Article

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• Matković, F., Brajša, R., Temmer, M., Heinemann, S. G., Ludwig, H. -G, Saar, S. H., Selhorst, C. L., Skokić, I., and Sudar, D. 2023. "Differences in physical properties of coronal bright points and their ALMA counterparts within and outside coronal holes." Astronomy and Astrophysics, 670 A146. https://doi.org/10.1051/0004-6361/202244160. 2023
• Velloso, E. N., Anthony, F., do Nascimento, J. -D, Silveira, L. F. Q., Hall, J., and Saar, S. H. 2023. "Multicomponent Activity Cycles Using Hilbert-Huang Analysis." The Astrophysical Journal, 945. https://doi.org/10.3847/2041-8213/acb8b4. 2023
• Irving, Zackery A., Saar, Steven H., Wargelin, Bradford J., and do Nascimento, José-Dias. 2023. "Stellar Cycles in Fully Convective Stars and a New Interpretation of Dynamo Evolution." The Astrophysical Journal, 949 51. https://doi.org/10.3847/1538-4357/acc468. 2023
• Acharya, Anshuman, Kashyap, Vinay L., Saar, Steven H., Singh, Kulinder Pal, and Cuntz, Manfred. 2023. "X-Ray Activity Variations and Coronal Abundances of the Star-Planet Interaction Candidate HD 179949." The Astrophysical Journal, 951 152. https://doi.org/10.3847/1538-4357/acd054. 2023
• Luhn, Jacob K., Wright, Jason T., Henry, Gregory W., Saar, Steven H., and Baum, Anna C. 2022. "HD 166620: Portrait of a Star Entering a Grand Magnetic Minimum." The Astrophysical Journal, 936 L23. https://doi.org/10.3847/2041-8213/ac8b13. 2022
• Haywood, R. D., Milbourne, Timothy W., Saar, S. H., Mortier, A., Phillips, David F., Charbonneau, D., Cameron, A. Collier, Cegla, H. M., Meunier, N., and Palumbo, M. L., III. 2022. "Unsigned Magnetic Flux as a Proxy for Radial-velocity Variations in Sun-like Stars." The Astrophysical Journal, 935 6. https://doi.org/10.3847/1538-4357/ac7c12. 2022
• Brajša, R., Skokić, I., Sudar, D., Benz, A. O., Krucker, S., Ludwig, H. -G, Saar, S. H., and Selhorst, C. L. 2021. "ALMA small-scale features in the quiet Sun and active regions." Astronomy and Astrophysics, 651 A6. https://doi.org/10.1051/0004-6361/201936231. 2021
• Costes, Jean C., Watson, Christopher A., de Mooij, Ernst, Saar, Steven H., Dumusque, Xavier, Cameron, Collier, Phillips, David F., Günther, Maximilian N., Jenkins, James S., Mortier, Annelies, and Thompson, Andrew P. G. 2021. "Long-term stellar activity variations and their effect on radial-velocity measurements." Monthly Notices of the Royal Astronomical Society, 505 830–850. https://doi.org/10.1093/mnras/stab1183. 2021
• Metcalfe, Travis S., van Saders, Jennifer L., Basu, Sarbani, Buzasi, Derek, Drake, Jeremy J., Egeland, Ricky, Huber, Daniel, Saar, Steven H., Stassun, Keivan G., Ball, Warrick H., Campante, Tiago L., Finley, Adam J., Kochukhov, Oleg, Mathur, Savita, Reinhold, Timo, See, Victor, Baliunas, Sallie, and Soon, Willie. 2021. "Magnetic and Rotational Evolution of ρ CrB from Asteroseismology with TESS." The Astrophysical Journal, 921 122. https://doi.org/10.3847/1538-4357/ac1f19. 2021
• Karna, Mahendra Lal, Karna, Nishu, Saar, Steven H., Pesnell, W. Dean, and DeLuca, Edward E. 2020. "A Study of Equatorial Coronal Holes during the Maximum Phase of Four Solar Cycles." The Astrophysical Journal, 901 124. https://doi.org/10.3847/1538-4357/abafae. 2020
• Velloso, E. N., Do Nascimento, Jose-Dias, Jr., and Saar, Steven H. 2020. "Long-term Periodicities in Kepler Photometry of Open Cluster NGC 6811." The Astrophysical Journal, 900 173. https://doi.org/10.3847/1538-4357/aba8a3. 2020
• do Nascimento, J. -D, Jr., de Almeida, L., Velloso, E. N., Anthony, F., Barnes, S. A., Saar, Steven H., Meibom, Søren, da Costa, J. S., Castro, M., Galarza, J. Y., Lorenzo-Oliveira, D., Beck, P. G., and Meléndez, J. 2020. "Rotation of Solar Analogs Crossmatching Kepler and Gaia DR2." The Astrophysical Journal, 898 173. https://doi.org/10.3847/1538-4357/ab9c16. 2020
• Miklos, M., Milbourne, Timothy W., Haywood, Raphaëlle D., Phillips, David F., Saar, Steven H., Meunier, N., Cegla, H. M., Dumusque, X., Langellier, Nicholas, Maldonado, J., Malavolta, L., Mortier, A., Thompson, S., Watson, C. A., Cecconi, M., Cosentino, R., Ghedina, A., Li, C. -H, López-Morales, Mercedes, Molinari, E., Poretti, Ennio, Sasselov, Dimitar, Sozzetti, A., and Walsworth, Ronald L. 2020. "Testing the Spectroscopic Extraction of Suppression of Convective Blueshift." The Astrophysical Journal, 888 117. https://doi.org/10.3847/1538-4357/ab59d5. 2020
• Thompson, A. P. G., Watson, C. A., Haywood, Raphaëlle D., Costes, J. C., de Mooij, E., Collier Cameron, A., Dumusque, X., Phillips, David F., Saar, Steven H., Mortier, A., Milbourne, T. W., Aigrain, S., Cegla, H. M., Charbonneau, David, Cosentino, R., Ghedina, A., Latham, David W., López-Morales, M., Micela, G., Molinari, E., Poretti, E., Sozzetti, A., Thompson, S., and Walsworth, Ronald L. 2020. "The spectral impact of magnetic activity on disc-integrated HARPS-N solar observations: exploring new activity indicators." Monthly Notices of the Royal Astronomical Society, 494 4279–4290. https://doi.org/10.1093/mnras/staa1010. 2020
• Curtis, Jason Lee, Agüeros, Marcel A., Matt, Sean P., Covey, Kevin R., Douglas, Stephanie T., Angus, Ruth, Saar, Steven H., Cody, Ann Marie, Vanderburg, Andrew, Law, Nicholas M., Kraus, Adam L., Latham, David W., Baranec, Christoph, Riddle, Reed, Ziegler, Carl, Lund, Mikkel N., Torres, Guillermo, Meibom, Søren, Aguirre, Victor Silva, and Wright, Jason T. 2020. "When Do Stalled Stars Resume Spinning Down? Advancing Gyrochronology with Ruprecht 147." The Astrophysical Journal, 904 140. https://doi.org/10.3847/1538-4357/abbf58. 2020
• Milbourne, Timothy W., Haywood, Raphaëlle D., Phillips, David F., Saar, Steve H., Cegla, H. M., Cameron, A. C., Costes, J., Dumusque, X., Langellier, Nicholas, Latham, David W., Maldonado, J., Malavolta, L., Mortier, A., Palumbo, Michael L.,III, Thompson, S., Watson, C. A., Bouchy, F., Buchschacher, N., Cecconi, M., Charbonneau, David, Cosentino, R., Ghedina, A., Glenday, Alexander G., Gonzalez, M., Li, C. -H et al. 2019. "HARPS-N Solar RVs Are Dominated by Large, Bright Magnetic Regions." The Astrophysical Journal, 874 107. https://doi.org/10.3847/1538-4357/ab064a. 2019
• Maldonado, J., Phillips, David F., Dumusque, X., Collier Cameron, A., Haywood, Raphaëlle D., Lanza, A. F., Micela, G., Mortier, A., Saar, Steven H., Sozzetti, A., Rice, K., Milbourne, Timothy, Cecconi, M., Cegla, H. M., Cosentino, R., Costes, J., Ghedina, A., Gonzalez, M., Guerra, J., Hernández, N., Li, C. -H, Lodi, M., Malavolta, L., Molinari, E., Pepe, F. et al. 2019. "Temporal evolution and correlations of optical activity indicators measured in Sun-as-a-star observations." Astronomy and Astrophysics, 627 A118. https://doi.org/10.1051/0004-6361/201935233. 2019
• Collier Cameron, A., Mortier, A., Phillips, David, Dumusque, X., Haywood, Raphaëlle D., Langellier, Nicholas, Watson, C. A., Cegla, H. M., Costes, J., Charbonneau, David, Coffinet, A., Latham, David W., Lopez-Morales, Mercedes, Malavolta, L., Maldonado, J., Micela, G., Milbourne, Timothy, Molinari, Emilio, Saar, S. H., Thompson, S., Buchschacher, Nicholas, Cecconi, M., Cosentino, R., Ghedina, A., Glenday, Alexander G. et al. 2019. "Three years of Sun-as-a-star radial-velocity observations on the approach to solar minimum." Monthly Notices of the Royal Astronomical Society, 487 1082–1100. https://doi.org/10.1093/mnras/stz1215. 2019
• Skokić, I., Brajša, R., Sudar, D., Ruždjak, D., and Saar, Steven H. 2019. "Turbulent Diffusion Derived from the Motions of SDO/AIA Coronal Bright Points." The Astrophysical Journal, 877 142. https://doi.org/10.3847/1538-4357/ab1d4f. 2019
• Wülser, J. P., Jaeggli, S., De Pontieu, B., Tarbell, T., Boerner, P., Freeland, S., Liu, W., Timmons, R., Brannon, S., Kankelborg, C., Madsen, Chad, McKillop, Sean, Prchlik, Jakub, Saar, Steven, Schanche, Nicole E., Testa, P., Bryans, P., and Wiesmann, M. 2018. "Instrument Calibration of the Interface Region Imaging Spectrograph (IRIS) Mission." Solar Physics, 293 Article 149. https://doi.org/10.1007/s11207-018-1364-8. 2018
• Cegla, H. M., Watson, C. A., Shelyag, S., Chaplin, W. J., Davies, G. R., Mathioudakis, M., Palumbo, M. L.,III, Saar, S. H., and Haywood, R. D. 2018. "Stellar Surface Magneto-convection as a Source of Astrophysical Noise. II. Center-to-limb Parameterization of Absorption Line Profiles and Comparison to Observations." The Astrophysical Journal, 866 55. https://doi.org/10.3847/1538-4357/aaddfc. 2018
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• Wargelin, B. J., Drake, Jeremy J., Pojmański, G., Kashyap, V. L., and Saar, S. H. 2017. "Optical, UV, and X-ray evidence for a 7-yr stellar cycle in Proxima Centauri." Monthly Notices of the Royal Astronomical Society, 464 3281–3296. https://doi.org/10.1093/mnras/stw2570. 2017
• Sudar, D., Saar, S. H., Skokic, I., Poljancic Beljan, I., and Brajša, R. 2016. "Meridional motions and Reynolds stress from SDO/AIA coronal bright points data." Astronomy and Astrophysics, 587 A29. https://doi.org/10.1051/0004-6361/201527217. 2016
• Takeda, Aki, Yoshimura, Keiji, and Saar, Steven H. 2016. "The Hinode/XRT Full-Sun Image Corrections and the Improved Synoptic Composite Image Archive." Solar Physics, 291 317–333. https://doi.org/10.1007/s11207-015-0823-8. 2016
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• Núñez, Alejandro, Agüeros, Marcel A., Covey, Kevin R., Hartman, Joel D., Kraus, Adam L., Bowsher, Emily C., Douglas, Stephanie T., López-Morales, Mercedes, Pooley, David A., Posselt, Bettina, Saar, Steven H., and West, Andrew A. 2015. "Linking Stellar Coronal Activity and Rotation at 500 Myr: A Deep Chandra Observation of M37." The Astrophysical Journal, 809 161. https://doi.org/10.1088/0004-637X/809/2/161. 2015
• Brown, Alexander, Neff, James E., Ayres, Thomas R., Kowalski, Adam, Hawley, Suzanne, Berdyugina, Svetlana, Harper, Graham M., Korhonen, Heidi, Piskunov, Nikolai, Saar, Steven, Walkowicz, Lucianne, and Wells, Mark A. 2015. "Serendipitous Discovery of a Dwarf Nova in the Kepler Field Near the G Dwarf KIC 5438845." The Astronomical Journal, 149 67. https://doi.org/10.1088/0004-6256/149/2/67. 2015
• Sudar, D., Skokic, I., Brajša, R., and Saar, S. H. 2015. "Steps towards a high precision solar rotation profile: Results from SDO/AIA coronal bright point data." Astronomy and Astrophysics, 575 A63. https://doi.org/10.1051/0004-6361/201424929. 2015
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• Kobelski, Adam R., Saar, Steven H., Weber, Mark A., McKenzie, David E., and Reeves, Katharine K. 2014. "Calibrating Data from the Hinode/X-Ray Telescope and Associated Uncertainties." Solar Physics, 289 2781–2802. https://doi.org/10.1007/s11207-014-0487-9. 2014
• Cranmer, Steven R., Bastien, Fabienne A., Stassun, Keivan G., and Saar, Steven H. 2014. "Stellar Granulation as the Source of High-frequency Flicker in Kepler Light Curves." The Astrophysical Journal, 781 124. https://doi.org/10.1088/0004-637X/781/2/124. 2014
• McCauley, Patrick I., Saar, Steven H., Raymond, John C., Ko, Yuan-Kuen, and Saint-Hilaire, Pascal. 2013. "Extreme-ultraviolet and X-Ray Observations of Comet Lovejoy (C/2011 W3) in the Lower Corona." The Astrophysical Journal, 768 161. https://doi.org/10.1088/0004-637X/768/2/161. 2013
• Martens, P. C. H., Attrill, G. D. R., Davey, Alisdair R., Engell, Alexander J., Farid, Samaiyah, Grigis, P. C., Kasper, Justin C., Korreck, Kelly E., Saar, S. H., Savcheva, A., Su, Y., Testa, P., Wills-Davey, M., Bernasconi, P. N., Raouafi, N. -E, Delouille, V. A., Hochedez, J. F., Cirtain, J. W., DeForest, C. E., Angryk, R. A., De Moortel, I., Wiegelmann, T., Georgoulis, M. K., McAteer, R. T. J., and Timmons, R. P. 2012. "Computer Vision for the Solar Dynamics Observatory (SDO)." Solar Physics, 275 79–113. https://doi.org/10.1007/s11207-010-9697-y. 2012
• Cheng, X., Zhang, J., Saar, S. H., and Ding, M. D. 2012. "Differential Emission Measure Analysis of Multiple Structural Components of Coronal Mass Ejections in the Inner Corona." The Astrophysical Journal, 761 62. https://doi.org/10.1088/0004-637X/761/1/62. 2012
• Schmelz, J. T., Worley, B. T., Anderson, D. J., Pathak, S., Kimble, J. A., Jenkins, B. S., and Saar, S. H. 2011. "Isothermal and Multithermal Analysis of Coronal Loops Observed with Atmospheric Imaging Assembly. II. 211 Å Selected Loops." The Astrophysical Journal, 739 33. https://doi.org/10.1088/0004-637X/739/1/33. 2011
• Kariyappa, R., DeLuca, Edward E., Saar, S. H., Golub, Leon, Damé, L., Pevtsov, A. A., and Varghese, B. A. 2011. "Temperature variability in X-ray bright points observed with Hinode/XRT." Astronomy and Astrophysics, 526 78. 2011
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• Winebarger, Amy R., Schmelz, Joan T., Warren, Harry P., Saar, Steve H., and Kashyap, Vinay L. 2011. "Using a Differential Emission Measure and Density Measurements in an Active Region Core to Test a Steady Heating Model." The Astrophysical Journal, 740 2. https://doi.org/10.1088/0004-637X/740/1/2. 2011
• Schmelz, J. T., Rightmire, L. A., Saar, S. H., Kimble, J. A., Worley, B. T., and Pathak, S. 2011. "Warm and Fuzzy: Temperature and Density Analysis of an Fe XV EUV Imaging Spectrometer Loop." The Astrophysical Journal, 738 146. https://doi.org/10.1088/0004-637X/738/2/146. 2011
• Schmelz, J. T., Kimble, J. A., Jenkins, B. S., Worley, B. T., Anderson, D. J., Pathak, S., and Saar, S. H. 2010. "Atmospheric Imaging Assembly Multithermal Loop Analysis: First Results." The Astrophysical Journal Letters, 725 L34–L37. https://doi.org/10.1088/2041-8205/725/1/L34. 2010
• Schmelz, J. T., Saar, S. H., Nasraoui, K., Kashyap, Vinay L., Weber, Mark A., DeLuca, Edward E., and Golub, Leon. 2010. "Multi-stranded and Multi-thermal Solar Coronal Loops: Evidence from Hinode X-ray Telescope and EUV Imaging Spectrometer Data." The Astrophysical Journal, 723 1180–1187. https://doi.org/10.1088/0004-637X/723/2/1180. 2010
• Schmelz, J. T., Saar, S. H., DeLuca, Edward E., Golub, Leon, Kashyap, Vinay L., Weber, Mark A., and Klimchuk, J. A. 2009. "Hinode X-Ray Telescope Detection of Hot Emission from Quiescent Active Regions: A Nanoflare Signature?" The Astrophysical Journal Letters, 693 L131–L135. 2009
• Cohen, O., Drake, Jeremy J., Kashyap, Vinay L., Saar, S. H., Sokolov, I. V., Manchester, W. B., Hansen, K. C., and Gombosi, T. I. 2009. "Interactions of the Magnetospheres of Stars and Close-In Giant Planets." The Astrophysical Journal Letters, 704 L85–L88. https://doi.org/10.1088/0004-637X/704/2/L85. 2009
• Schmelz, J. T., Kashyap, Vinay L., Saar, S. H., Dennis, B. R., Grigis, P. C., Lin, L., De Luca, E. E., Holman, G. D., Golub, Leon, and Weber, Mark A. 2009. "Some Like It Hot: Coronal Heating Observations from Hinode X-ray Telescope and RHESSI." The Astrophysical Journal, 704 863–869. https://doi.org/10.1088/0004-637X/704/1/863. 2009
• Hall, Jeffrey C., Henry, Gregory W., Lockwood, G. W., Skiff, Brian A., and Saar, Steven H. 2009. "The Activity and Variability of the Sun and Sun-Like Stars. II. Contemporaneous Photometry and Spectroscopy of Bright Solar Analogs." The Astronomical Journal, 138 312–322. 2009
• Ayres, Thomas R., Judge, Philip G., Saar, Steven H., and Schmitt, Jürgen H. M. M. 2008. "The Fainting of ? Centauri A, Resolved." The Astrophysical Journal Letters, 678 L121–L124. https://doi.org/10.1086/588581. 2008
• Moss, David, Saar, Steven H., and Sokoloff, Dmitry. 2008. "What can we hope to know about the symmetry properties of stellar magnetic fields?" Monthly Notices of the Royal Astronomical Society, 388 416–420. https://doi.org/10.1111/j.1365-2966.2008.13404.x. 2008
• Li, H., Sakurai, T., Ichimito, K., Suematsu, Y., Tsuneta, S., Katsukawa, Y., Shimizu, T., Shine, R. A., Tarbell, T. D., Title, A. M., Lites, B., Kubo, M., Nagata, S., Kotoku, J., Shibasaki, K., Saar, S. H., and Bobra, M. 2007. "Response of the Solar Atmosphere to Magnetic Flux Emergence from Hinode Observations." Publications of the Astronomical Society of Japan, 59 643. 2007