Article

• Sun, Kang, Yousefi, Mahdi, Miller, Christopher Chan, Chance, Kelly, González Abad, Gonzalo, Gordon, Iouli E., Liu, Xiong, O'Sullivan, Ewan, Sioris, Christopher E., and Wofsy, Steven C. 2022. "An optimal estimation-based retrieval of upper atmospheric oxygen airglow and temperature from SCIAMACHY limb observations." Atmospheric Measurement Techniques, 15 3721–3745. https://doi.org/10.5194/amt-15-3721-2022. 2022
• Olivares, V., Salomé, P., Hamer, S. L., Combes, F., Gaspari, M., Kolokythas, K., O'Sullivan, Ewan, Beckmann, R. S., Babul, A., Polles, F. L., Lehnert, M., Loubser, S. I., Donahue, M., Gendron-Marsolais, M. -L, Lagos, P., Pineau des Forets, G., Godard, B., Rose, T., Tremblay, Grant, Ferland, G., and Guillard, P. 2022. "Gas condensation in brightest group galaxies unveiled with MUSE. Morphology and kinematics of the ionized gas." Astronomy and Astrophysics, 666 A94. https://doi.org/10.1051/0004-6361/202142475. 2022
• Jung, S. Lyla, Rennehan, Douglas, Saeedzadeh, Vida, Babul, Arif, Tremmel, Michael, Quinn, Thomas R., Loubser, S. Ilani, O'Sullivan, Ewan, and Yi, Sukyoung K. 2022. "Massive central galaxies of galaxy groups in the ROMULUS simulations: an overview of galaxy properties at z = 0." Monthly Notices of the Royal Astronomical Society, 515 22–47. https://doi.org/10.1093/mnras/stac1622. 2022
• Loubser, S. I., Lagos, P., Babul, A., O'Sullivan, Ewan, Jung, S. L., Olivares, V., and Kolokythas, K. 2022. "Merger histories of brightest group galaxies from MUSE stellar kinematics." Monthly Notices of the Royal Astronomical Society, 515 1104–1121. https://doi.org/10.1093/mnras/stac1781. 2022
• Lagos, P., Loubser, S. I., Scott, T. C., O'Sullivan, Ewan, Kolokythas, K., Babul, A., Nigoche-Netro, A., Olivares, V., and Sengupta, C. 2022. "Spatially resolved properties of early-type group-dominant galaxies with MUSE: gas content, ionization mechanisms, and metallicity gradients." Monthly Notices of the Royal Astronomical Society, 516 5487–5506. https://doi.org/10.1093/mnras/stac2535. 2022
• Kolokythas, Konstantinos, Vaddi, Sravani, O'Sullivan, Ewan, Loubser, Ilani, Babul, Arif, Raychaudhury, Somak, Lagos, Patricio, and Jarrett, Thomas H. 2022. "The Complete Local-Volume Groups Sample - IV. Star formation and gas content in group-dominant galaxies." Monthly Notices of the Royal Astronomical Society, 510 4191–4207. https://doi.org/10.1093/mnras/stab3699. 2022
• Schellenberger, Gerrit, Giacintucci, Simona, Lovisari, Lorenzo, O'Sullivan, Ewan, Vrtilek, Jan, David, Laurence P., Melin, Jean-Baptiste, Lal, Dharam Vir, Ettori, Stefano, Kolokythas, Konstantinos, Sereno, Mauro, and Raychaudhury, Somak. 2022. "The Unusually Weak and Exceptionally Steep Radio Relic in A2108." The Astrophysical Journal, 925 91. https://doi.org/10.3847/1538-4357/ac3b5a. 2022
• Seth, Ruchika, O'Sullivan, Ewan, Sebastian, Biny, Raychaudhury, Somak, Schellenberger, Gerrit, and Haines, Christopher P. 2022. "The contribution of non-central radio galaxies to AGN feedback in rich galaxy clusters." Monthly Notices of the Royal Astronomical Society, 513 3273–3288. https://doi.org/10.1093/mnras/stac1064. 2022
• Grossová, Romana, Werner, Norbert, Massaro, Francesco, Lakhchaura, Kiran, PlÅ¡ek, Tomáš, Gabányi, Krisztina, Rajpurohit, Kamlesh, Canning, Rebecca E. A., Nulsen, Paul, O'Sullivan, Ewan, Allen, Steven W., and Fabian, Andrew. 2022. "Very Large Array Radio Study of a Sample of Nearby X-Ray and Optically Bright Early-type Galaxies." The Astrophysical Journal Supplement Series, 258 30. https://doi.org/10.3847/1538-4365/ac366c. 2022
• O'Sullivan, Ewan, Kunert-Bajraszewska, Magdalena, Siemiginowska, Aneta, Burke, Douglas J., Combes, Françoise, Salomé, Philippe, and Giacintucci, Simona. 2021. "1321 045: A compact steepâ€'spectrum radio source in a coolâ€'core galaxy cluster." Astronomische Nachrichten, 342 1155–1159. https://doi.org/10.1002/asna.20210035. 2021
• Pasini, Thomas, Gitti, Myriam, Brighenti, Fabrizio, O'Sullivan, Ewan, Gastaldello, Fabio, Temi, Paquale, and Hamer, Stephen L. 2021. "A First Chandra View of the Cool Core Cluster A1668: Offset Cooling and AGN Feedback Cycle." The Astrophysical Journal, 911 66. https://doi.org/10.3847/1538-4357/abe85f. 2021
• O'Sullivan, Ewan, Combes, Françoise, Babul, Arif, Chapman, Scott, Phadke, Kedar A., Schellenberger, Gerrit, and Salomé, Philippe. 2021. "Molecular gas along the old radio jets of the cluster-central type 2 quasar IRAS 09104 4109." Monthly Notices of the Royal Astronomical Society, 508 3796–3811. https://doi.org/10.1093/mnras/stab2825. 2021
• Schellenberger, Gerrit, David, Laurence P., Vrtilek, Jan, O'Sullivan, Ewan, Lim, Jeremy, Forman, William, Sun, Ming, Combes, Francoise, Salome, Philippe, Jones, Christine, Giacintucci, Simona, Edge, Alastair, Gastaldello, Fabio, Temi, Pasquale, Brighenti, Fabrizio, and Bardelli, Sandro. 2020. "Atacama Compact Array Measurements of the Molecular Mass in the NGC 5044 Cooling-flow Group." The Astrophysical Journal, 894 72. https://doi.org/10.3847/1538-4357/ab879c. 2020
• Loubser, S. I., Babul, A., Hoekstra, H., Bahé, Y. M., O'Sullivan, Ewan, and Donahue, M. 2020. "Dynamical masses of brightest cluster galaxies I: stellar velocity anisotropy and mass-to-light ratios." Monthly Notices of the Royal Astronomical Society, 496 1857–1880. https://doi.org/10.1093/mnras/staa1682. 2020
• Pan, Hsi-An, Lin, Lihwai, Hsieh, Bau-Ching, Michalowski, Michal J., Bothwell, Matthew S., Huang, Song, Moiseev, Alexei V., Oparin, Dmitry, O'Sullivan, Ewan, Worrall, Diana M., Sánchez, Sebastián F., Gwyn, Stephen, Law, David R., Stark, David V., Bizyaev, Dmitry, Li, Cheng, Lee, Chien-Hsiu, Fu, Hai, Belfiore, Francesco, Bundy, Kevin, Fernández-Trincado, José G., Gelfand, Joseph, and Peirani, Sébastien. 2020. "SDSS-IV MaNGA: The Nature of an Off-galaxy H_a Blob-A Multiwavelength View of Offset Cooling in a Merging Galaxy Group." The Astrophysical Journal, 903 16. https://doi.org/10.3847/1538-4357/abb80c. 2020
• Kim, Dong-Woo, Traynor, Liam, Paggi, Alessandro, O'Sullivan, Ewan, Anderson, Craig, Burke, Douglas, D'Abrusco, Raffaele, Fabbiano, Giuseppina, Fruscione, Antonella, Lauer, Jennifer, McCollough, Michael, Morgan, Douglas, Mossman, Amy, Vrtilek, Saeqa, and Trinchieri, Ginevra. 2020. "Temperature profiles of hot gas in early-type galaxies." Monthly Notices of the Royal Astronomical Society, 492 2095–2118. https://doi.org/10.1093/mnras/stz3530. 2020
• Pasini, T., Brüggen, M., de Gasperin, F., Bîrzan, L., O'Sullivan, Ewan, Finoguenov, A., Jarvis, M., Gitti, M., Brighenti, F., Whittam, I. H., Collier, J. D., Heywood, I., and Gozaliasl, G. 2020. "The relation between the diffuse X-ray luminosity and the radio power of the central AGN in galaxy groups." Monthly Notices of the Royal Astronomical Society, 497 2163–2174. https://doi.org/10.1093/mnras/staa2049. 2020
• Pasini, T., Gitti, M., Brighenti, F., Temi, P., Amblard, A., Hamer, S. L., Ettori, S., O'Sullivan, Ewan, and Gastaldello, F. 2019. "A BCG with Offset Cooling: Is the AGN Feedback Cycle Broken in A2495?" The Astrophysical Journal, 885 111. https://doi.org/10.3847/1538-4357/ab4808. 2019
• O'Sullivan, Ewan, Schellenberger, Gerrit, Burke, Douglas J., Sun, Ming, Vrtilek, Jan M., David, Laurence P., and Sarazin, Craig. 2019. "Building a cluster: shocks, cavities, and cooling filaments in the group-group merger NGC 6338." Monthly Notices of the Royal Astronomical Society, 488 2925–2946. https://doi.org/10.1093/mnras/stz1711. 2019
• Kim, Dong-Woo, Anderson, Craig S., Burke, Douglas J., D'Abrusco, Raffaele, Fabbiano, Giuseppina, Fruscione, Antonella, Lauer, Jennifer, McCollough, Michael, Morgan, Douglas, Mossman, Amy, O'Sullivan, Ewan, Paggi, Alessandro, Vrtilek, Saeqa, and Trinchieri, Ginevra. 2019. "Chandra Early-type Galaxy Atlas." The Astrophysical Journal Supplement Series, 241 36. https://doi.org/10.3847/1538-4365/ab0ca4. 2019
• Schellenberger, Gerrit, David, Laurence, O'Sullivan, Ewan, Vrtilek, Jan M., and Haines, C. P. 2019. "Forming One of the Most Massive Objects in the Universe: The Quadruple Merger in Abell 1758." The Astrophysical Journal, 882 59. https://doi.org/10.3847/1538-4357/ab35e4. 2019
• Kolokythas, Konstantinos, O'Sullivan, Ewan, Intema, Huib, Raychaudhury, Somak, Babul, Arif, Giacintucci, Simona, and Gitti, Myriam. 2019. "The complete local volume groups sample - III. Characteristics of group central radio galaxies in the Local Universe." Monthly Notices of the Royal Astronomical Society, 489 2488–2504. https://doi.org/10.1093/mnras/stz2082. 2019
• van Dokkum, Pieter, Danieli, Shany, Cohen, Yotam, Merritt, Allison, Romanowsky, Aaron J., Abraham, Roberto, Brodie, Jean, Conroy, Charlie, Lokhorst, Deborah, Mowla, Lamiya, O'Sullivan, Ewan, and Zhang, Jielai. 2018. "A galaxy lacking dark matter." Nature, 555 629–632. https://doi.org/10.1038/nature25767. 2018
• van Dokkum, Pieter, Cohen, Yotam, Danieli, Shany, Kruijssen, J. M. Diederik, Romanowsky, Aaron J., Merritt, Allison, Abraham, Roberto, Brodie, Jean, Conroy, Charlie, Lokhorst, Deborah, Mowla, Lamiya, O'Sullivan, Ewan, and Zhang, Jielai. 2018. "An Enigmatic Population of Luminous Globular Clusters in a Galaxy Lacking Dark Matter." The Astrophysical Journal Letters, 856 L30. https://doi.org/10.3847/2041-8213/aab60b. 2018
• O'Sullivan, Ewan J., Combes, F., Salomé, P., David, L. P., Babul, A., Vrtilek, Jan M., Lim, J., Olivares, V., Raychaudhury, S., and Schellenberger, Gerrit. 2018. "Cold gas in a complete sample of group-dominant early-type galaxies." Astronomy and Astrophysics, 618 A126. https://doi.org/10.1051/0004-6361/201833580. 2018
• Kim, Dong-Woo, Anderson, Craig, Burke, Doug, Fabbiano, Giuseppina, Fruscione, Antonella, Lauer, Jen, McCollough, Michael, Morgan, Doug, Mossman, Amy, O'Sullivan, Ewan, Paggi, Alessandro, Vrtilek, Saeqa, and Trinchieri, Ginevra. 2018. "Disturbed Fossil Group Galaxy NGC 1132." The Astrophysical Journal, 853 129. https://doi.org/10.3847/1538-4357/aaa43a. 2018
• Kolokythas, Konstantinos, O'Sullivan, Ewan, Raychaudhury, Somak, Giacintucci, Simona, Gitti, Myriam, and Babul, Arif. 2018. "The Complete Local-volume Groups Sample - II. A study of the central radio galaxies in the high-richness sub-sample." Monthly Notices of the Royal Astronomical Society, 481 1550–1577. https://doi.org/10.1093/mnras/sty2030. 2018
• Ignesti, A., Gitti, M., Brunetti, G., O'Sullivan, Ewan, Sarazin, C., and Wong, K. 2018. "The mystery of the "Kite" radio source in Abell 2626: Insights from new Chandra observations." Astronomy and Astrophysics, 610 A89. https://doi.org/10.1051/0004-6361/201731380. 2018
• O'Sullivan, Ewan, Kolokythas, Konstantinos, Kantharia, Nimisha G., Raychaudhury, Somak, David, Laurence P., and Vrtilek, Jan M. 2018. "The origin of the X-ray, radio and H I structures in the NGC 5903 galaxy group." Monthly Notices of the Royal Astronomical Society, 473 5248–5266. https://doi.org/10.1093/mnras/stx2702. 2018
• Paggi, Alessandro, Kim, Dong-Woo, Anderson, Craig, Burke, Doug, D'Abrusco, Raffaele, Fabbiano, Giuseppina, Fruscione, Antonella, Gokas, Tara, Lauer, Jen, McCollough, Michael, Morgan, Doug, Mossman, Amy, O'Sullivan, Ewan, Trinchieri, Ginevra, Vrtilek, Saeqa, Pellegrini, Silvia, Romanowsky, Aaron J., and Brodie, Jean. 2017. "Constraining the Physical State of the Hot Gas Halos in NGC 4649 and NGC 5846." The Astrophysical Journal, 844 5. https://doi.org/10.3847/1538-4357/aa7897. 2017
• O'Sullivan, Ewan, Ponman, Trevor J., Kolokythas, Konstantinos, Raychaudhury, Somak, Babul, Arif, Vrtilek, Jan M., David, Laurence P., Giacintucci, Simona, Gitti, Myriam, and Haines, Chris P. 2017. "The Complete Local Volume Groups Sample - I. Sample selection and X-ray properties of the high-richness subsample." Monthly Notices of the Royal Astronomical Society, 472 1482–1505. https://doi.org/10.1093/mnras/stx2078. 2017
• David, Laurence P., Vrtilek, Jan, O'Sullivan, Ewan, Jones, Christine, Forman, William, and Sun, Ming. 2017. "The Presence of Thermally Unstable X-Ray Filaments and the Production of Cold Gas in the NGC 5044 Group." The Astrophysical Journal, 842 84. https://doi.org/10.3847/1538-4357/aa756c. 2017
• O'Sullivan, Ewan J., Combes, F., Hamer, S., Salomé, P., Babul, A., and Raychaudhury, S. 2015. "Cold gas in group-dominant elliptical galaxies." Astronomy and Astrophysics, 573 A111. https://doi.org/10.1051/0004-6361/201424835. 2015
• Kolokythas, Konstantinos, O'Sullivan, Ewan J., Giacintucci, Simona, Raychaudhury, Somak, Ishwara-Chandra, C. H., Worrall, Diana M., and Birkinshaw, Mark. 2015. "New insights into the evolution of the FR I radio galaxy 3C 270 (NGC 4261) from VLA and GMRT radio observations." Monthly Notices of the Royal Astronomical Society, 450 1732–1744. https://doi.org/10.1093/mnras/stv665. 2015
• O'Sullivan, Ewan J., Zezas, Andreas, Vrtilek, J. M., Giacintucci, S., Trevisan, M., David, L. P., Ponman, T. J., Mamon, G. A., and Raychaudhury, S. 2014. "Deep Chandra Observations of HCG 16. I. Active Nuclei, Star Formation, and Galactic Winds." The Astrophysical Journal, 793 73. https://doi.org/10.1088/0004-637X/793/2/73. 2014
• O'Sullivan, Ewan J., Vrtilek, J. M., David, L. P., Giacintucci, S., Zezas, Andreas, Ponman, T. J., Mamon, G. A., Nulsen, P., and Raychaudhury, S. 2014. "Deep Chandra Observations of HCG 16. II. The Development of the Intra-group Medium in a Spiral-rich Group." The Astrophysical Journal, 793 74. https://doi.org/10.1088/0004-637X/793/2/74. 2014
• David, Laurence P., Lim, Jeremy, Forman, William, Vrtilek, Jan, Combes, Francoise, Salome, Philippe, Edge, Alastair, Hamer, Stephen, Jones, Christine, Sun, Ming, O'Sullivan, Ewan J., Gastaldello, Fabio, Bardelli, Sandro, Temi, Pasquale, Schmitt, Henrique, Ohyama, Youichi, Mathews, William, Brighenti, Fabrizio, Giacintucci, Simona, and Trung, Dinh-V. 2014. "Molecular Gas in the X-Ray Bright Group NGC 5044 as Revealed by ALMA." The Astrophysical Journal, 792 94. https://doi.org/10.1088/0004-637X/792/2/94. 2014
• O'Sullivan, Ewan J., David, Laurence P., and Vrtilek, Jan M. 2014. "The impact of sloshing on the intragroup medium and old radio lobe of NGC 5044." Monthly Notices of the Royal Astronomical Society, 437 730–739. https://doi.org/10.1093/mnras/stt1926. 2014
• Ettori, S., Gastaldello, F., Gitti, M., O'Sullivan, Ewan J., Gaspari, M., Brighenti, F., David, L., and Edge, A. C. 2013. "Cold fronts and metal anisotropies in the X-ray cool core of the galaxy cluster Zw 1742 3306." Astronomy and Astrophysics, 555 93. https://doi.org/10.1051/0004-6361/201321107. 2013
• Appleton, P. N., Guillard, P., Boulanger, F., Cluver, M. E., Ogle, P., Falgarone, E., Pineau des Forêts, G., O'Sullivan, Ewan J., Duc, P. -A, Gallagher, S., Gao, Y., Jarrett, T., Konstantopoulos, I., Lisenfeld, U., Lord, S., Lu, N., Peterson, B. W., Struck, C., Sturm, E., Tuffs, R., Valchanov, I., van der Werf, P., and Xu, K. C. 2013. "Shock-enhanced C Emission and the Detection of H2O from the Stephan's Quintet Group-wide Shock Using Herschel." The Astrophysical Journal, 777 66. https://doi.org/10.1088/0004-637X/777/1/66. 2013
• O'Sullivan, Ewan J., Giacintucci, Simona, Babul, Arif, Raychaudhury, Somak, Venturi, Tiziana, Bildfell, Chris, Mahdavi, Andisheh, Oonk, J. B. R., Murray, Norman, Hoekstra, Henk, and Donahue, Megan. 2012. "A Giant Metrewave Radio Telescope/Chandra view of IRAS 09104 4109: a type 2 QSO in a cooling flow." Monthly Notices of the Royal Astronomical Society, 424 2971–2993. https://doi.org/10.1111/j.1365-2966.2012.21459.x. 2012
• Giacintucci, Simona, O'Sullivan, Ewan J., Clarke, Tracy E., Murgia, Matteo, Vrtilek, Jan M., Venturi, Tiziana, David, Laurence P., Raychaudhury, Somak, and Athreya, Ramana M. 2012. "Recurrent Radio Outbursts at the Center of the NGC 1407 Galaxy Group." The Astrophysical Journal, 755 172. https://doi.org/10.1088/0004-637X/755/2/172. 2012
• Bonfini, P., Zezas, Andreas, Birkinshaw, M., Worrall, D. M., Fabbiano, G., O'Sullivan, Ewan J., Trinchieri, G., and Wolter, A. 2012. "Studying the asymmetry of the globular cluster population of NGC 4261." Monthly Notices of the Royal Astronomical Society, 421 2872–2887. https://doi.org/10.1111/j.1365-2966.2012.20514.x. 2012
• Humphrey, Philip J., Buote, David A., O'Sullivan, Ewan J., and Ponman, Trevor J. 2012. "The ElIXr Galaxy Survey. II. Baryons and Dark Matter in an Isolated Elliptical Galaxy." The Astrophysical Journal, 755 166. https://doi.org/10.1088/0004-637X/755/2/166. 2012
• Forbes, Duncan A., Ponman, Trevor, and O'Sullivan, Ewan J. 2012. "The baryonic haloes of elliptical galaxies: radial distribution of globular clusters and diffuse hot gas." Monthly Notices of the Royal Astronomical Society, 425 66–73. https://doi.org/10.1111/j.1365-2966.2012.21368.x. 2012
• Giacintucci, Simona, O'Sullivan, Ewan J., Vrtilek, Jan, David, Laurence P., Raychaudhury, Somak, Venturi, Tiziana, Athreya, Ramana M., Clarke, Tracy E., Murgia, Matteo, Mazzotta, Pasquale, Gitti, Myriam, Ponman, Trevor, Ishwara-Chandra, C. H., Jones, Christine, and Forman, William R. 2011. "A Combined Low-radio Frequency/X-ray Study of Galaxy Groups. I. Giant Metrewave Radio Telescope Observations at 235 MHz AND 610 MHz." The Astrophysical Journal, 732 95. https://doi.org/10.1088/0004-637X/732/2/95. 2011
• O'Sullivan, Ewan J., Giacintucci, Simona, David, Laurence P., Vrtilek, Jan M., and Raychaudhury, Somak. 2011. "A deep Chandra observation of the poor cluster AWM 4 - II. The role of the radio jets in enriching the intracluster medium." Monthly Notices of the Royal Astronomical Society, 411 1833–1842. https://doi.org/10.1111/j.1365-2966.2010.17812.x. 2011
• David, Laurence P., O'Sullivan, Ewan J., Jones, Christine, Giacintucci, Simona, Vrtilek, Jan, Raychaudhury, Somak, Nulsen, Paul E. J., Forman, William R., Sun, Ming, and Donahue, Megan. 2011. "Active-Galactic-Nucleus-Driven Weather and Multiphase Gas in the Core of the NGC 5044 Galaxy Group." The Astrophysical Journal, 728, (2) 162. https://doi.org/10.1088/0004-637X/728/2/162. 2011
• O'Sullivan, Ewan J., Giacintucci, S., David, L. P., Gitti, M., Vrtilek, J. M., Raychaudhury, S., and Ponman, T. J. 2011. "Heating the Hot Atmospheres of Galaxy Groups and Clusters with Cavities: The Relationship between Jet Power and Low-frequency Radio Emission." The Astrophysical Journal, 735 11. https://doi.org/10.1088/0004-637X/735/1/11. 2011
• O'Sullivan, Ewan J., Worrall, D. M., Birkinshaw, Mark, Trinchieri, G., Wolter, A., Zezas, Andreas, and Giacintucci, S. 2011. "Interaction between the intergalactic medium and central radio source in the NGC 4261 group of galaxies." Monthly Notices of the Royal Astronomical Society, 416 2916–2931. https://doi.org/10.1111/j.1365-2966.2011.19239.x. 2011
• O'Sullivan, Ewan J., Giacintucci, Simona, David, Laurence P., Vrtilek, Jan M., and Raychaudhury, Somak. 2010. "A deep Chandra observation of the poor cluster AWM 4 - I. Properties of the central radio galaxy and its effects on the intracluster medium." Monthly Notices of the Royal Astronomical Society, 407 321–338. https://doi.org/10.1111/j.1365-2966.2010.16895.x. 2010
• Gitti, Myriam, O'Sullivan, Ewan J., Giacintucci, Simona, David, Laurence P., Vrtilek, Jan, Raychaudhury, Somak, and Nulsen, Paul E. J. 2010. "Cavities and Shocks in the Galaxy Group HCG 62 as Revealed by Chandra, XMM-Newton, and Giant Metrewave Radio Telescope Data." The Astrophysical Journal, 714 758–771. https://doi.org/10.1088/0004-637X/714/1/758. 2010
• Machacek, M. E., O'Sullivan, Ewan J., Randall, Scott W., Jones, C., and Forman, William R. 2010. "The Mysterious Merger of NGC 6868 and NGC 6861 in the Telescopium Group." The Astrophysical Journal, 711 1316–1332. 2010
• Worrall, D. M., Birkinshaw, Mark, O'Sullivan, Ewan J., Zezas, Andreas, Wolter, A., Trinchieri, G., and Fabbiano, Giuseppina. 2010. "The jet and counterjet of 3C270 (NGC4261) viewed in the X-ray with Chandra." Monthly Notices of the Royal Astronomical Society, 408 701–712. https://doi.org/10.1111/j.1365-2966.2010.17162.x. 2010
• O'Sullivan, Ewan J., Giacintucci, Simona, Vrtilek, J. M., Raychaudhury, S., and David, L. P. 2009. "A Chandra X-ray View of Stephan's Quintet: Shocks and Star Formation." The Astrophysical Journal, 701 1560–1568. https://doi.org/10.1088/0004-637X/701/2/1560. 2009
• Sanderson, Alastair J. R., O'Sullivan, Ewan J., and Ponman, Trevor J. 2009. "A statistically selected Chandra sample of 20 galaxy clusters - II. Gas properties and cool core/non-cool core bimodality." Monthly Notices of the Royal Astronomical Society, 395, (2) 764–776. https://doi.org/10.1111/j.1365-2966.2009.14613.x. 2009
• Johnson, Ria, Chakrabarty, Dalia, O'Sullivan, Ewan J., and Raychaudhury, Somak. 2009. "Comparing X-ray and Dynamical Mass Profiles in the Early-type Galaxy NGC 4636." The Astrophysical Journal, 706 980–994. 2009
• David, Laurence P., Jones, Christine, Forman, William R., Nulsen, Paul E. J., Vrtilek, Jan, O'Sullivan, Ewan J., Giacintucci, Simona, and Raychaudhury, Somak. 2009. "Isotropic Active Galactic Nucleus Heating with Small Radio-quiet Bubbles in the NGC 5044 Group." The Astrophysical Journal, 705 624–638. https://doi.org/10.1088/0004-637X/705/1/624. 2009
• Napolitano, N. R., Romanowsky, A. J., Coccato, L., Capaccioli, M., Douglas, N. G., Noordermeer, E., Gerhard, O., Arnaboldi, M., de Lorenzi, F., Kuijken, K., Merrifield, M. R., O'Sullivan, Ewan J., Cortesi, A., Das, P., and Freeman, K. C. 2009. "The Planetary Nebula Spectrograph elliptical galaxy survey: the dark matter in NGC 4494." Monthly Notices of the Royal Astronomical Society, 393 329–353. https://doi.org/10.1111/j.1365-2966.2008.14053.x. 2009
• Giacintucci, Simona, Vrtilek, Jan M., Murgia, Matteo, Raychaudhury, Somak, O'Sullivan, Ewan J., Venturi, Tiziana, David, Laurence P., Mazzotta, Pasquale, Clarke, Tracy E., and Athreya, Ramana M. 2008. "A Giant Metrewave Radio Telescope Multifrequency Radio Study of the Isothermal Core of the Poor Galaxy Cluster AWM 4." The Astrophysical Journal, 682 186–198. https://doi.org/10.1086/589280. 2008
• Jetha, Nazirah N., Hardcastle, Martin J., Babul, Arif, O'Sullivan, Ewan J., Ponman, Trevor J., Raychaudhury, Somak, and Vrtilek, Jan. 2008. "The nature of the ghost cavity in the NGC 741 group." Monthly Notices of the Royal Astronomical Society, 384 1344–1354. 2008