Publications of S. P. Rajaguru ordered by citations

A list of publications authored or co-authored by S. P. Rajaguru, derived from the SAO/NASA Astrophysics Data System (ADS) and ordered by the numbers of citations.

Orcid ID: 0000-0003-0003-4561

111	Meridional Circulation in the Solar Convection Zone: Time-Distance Helioseismic Inferences from Four Years of HMI/SDO Observations Rajaguru, S. P. & Antia, H. M., 2015, ApJ, 813, 114
101	Modeling the Subsurface Structure of Sunspots Moradi, H., Baldner, C., Birch, A. C., Braun, D. C., Cameron, R. H., Duvall, T. L., Gizon, L., Haber, D., Hanasoge, S. M., Hindman, B. W., Jackiewicz, J., Khomenko, E., Komm, R., Rajaguru, P., Rempel, M., Roth, M., Schlichenmaier, R., Schunker, H., Spruit, H. C., Strassmeier, K. G., Thompson, M. J. & Zharkov, S., 2010, Solar Physics, 267, 1
64	Ring Diagram Analysis of the Characteristics of Solar Oscillation Modes in Active Regions Rajaguru, S. P., Basu, Sarbani & Antia, H. M., 2001, ApJ, 563, 410
60	Line-of-Sight Observables Algorithms for the Helioseismic and Magnetic Imager (HMI) Instrument Tested with Interferometric Bidimensional Spectrometer (IBIS) Observations Couvidat, Sébastien, Rajaguru, S. P., Wachter, Richard, Sankarasubramanian, K., Schou, Jesper & Scherrer, Philip H., 2012, Solar Physics, 278, 217
42	Radiative Transfer Effects on Doppler Measurements as Sources of Surface Effects in Sunspot Seismology Rajaguru, S. P., Sankarasubramanian, K., Wachter, R. & Scherrer, P. H., 2007, ApJ, 654, L175
39	Host Star Metallicity of Directly Imaged Wide-orbit Planets: Implications for Planet Formation Swastik, C., Banyal, Ravinder K., Narang, Mayank, Manoj, P., Sivarani, T., Reddy, Bacham E. & Rajaguru, S. P., 2021, The Astronomical Journal, 161, 114
38	Sensitivity of Time-Distance Helioseismic Measurements to Spatial Variation of Oscillation Amplitudes. I. Observations and a Numerical Model Rajaguru, S. P., Birch, A. C., Duvall, T. L., Jr., Thompson, M. J. & Zhao, J., 2006, ApJ, 646, 543
36	Contamination by Surface Effects of Time-Distance Helioseismic Inversions for Sound Speed beneath Sunspots Couvidat, S. & Rajaguru, S. P., 2007, ApJ, 661, 558
35	Properties of High-Frequency Wave Power Halos Around Active Regions: An Analysis of Multi-height Data from HMI and AIA Onboard SDO Rajaguru, S. P., Couvidat, S., Sun, Xudong, Hayashi, K. & Schunker, H., 2013, Solar Physics, 287, 107
32	Solar meridional circulation from twenty-one years of SOHO/MDI and SDO/HMI observations. Helioseismic travel times and forward modeling in the ray approximation Liang, Zhi-Chao, Gizon, Laurent, Birch, Aaron C., Duvall, Thomas L. & Rajaguru, S. P., 2018, A&A, 619, A99
29	Magnetic Fields and the Supply of Low-frequency Acoustic Wave Energy to the Solar Chromosphere Rajaguru, S. P., Sangeetha, C. R. & Tripathi, Durgesh, 2019, ApJ, 871, 155
28	3D Simulations of Realistic Power Halos in Magnetohydrostatic Sunspot Atmospheres: Linking Theory and Observation Rijs, Carlos, Rajaguru, S. P., Przybylski, Damien, Moradi, Hamed, Cally, Paul S. & Shelyag, Sergiy, 2016, ApJ, 817, 45
28	Simulation of the small-scale magnetism in main-sequence stellar atmospheres Salhab, R. G., Steiner, O., Berdyugina, S. V., Freytag, B., Rajaguru, S. P. & Steffen, M., 2018, A&A, 614, A78
28	Helioseismic Inversion to Infer the Depth Profile of Solar Meridional Flow Using Spherical Born Kernels Mandal, K., Hanasoge, S. M., Rajaguru, S. P. & Antia, H. M., 2018, ApJ, 863, 39
22	Impact of locally suppressed wave sources on helioseismic traveltimes Hanasoge, S. M., Couvidat, S., Rajaguru, S. P. & Birch, A. C., 2008, MNRAS, 391, 1931
19	Galactic Chemical Evolution of Exoplanet Hosting Stars: Are High-mass Planetary Systems Young? Swastik, C., Banyal, Ravinder K., Narang, Mayank, Manoj, P., Sivarani, T., Rajaguru, S. P., Unni, Athira & Banerjee, Bihan, 2022, The Astronomical Journal, 164, 60
19	Local Helioseismic and Spectroscopic Analyses of Interactions Between Acoustic Waves and a Sunspot Rajaguru, S. P., Wachter, R., Sankarasubramanian, K. & Couvidat, S., 2010, ApJ, 721, L86
19	Comparison of GONG and MDI: Sound-Speed Anomalies beneath Two Active Regions Hughes, S. J., Rajaguru, S. P. & Thompson, M. J., 2005, ApJ, 627, 1040
16	Comparison OF Noise Properties Of GONG And MDI Time-Distance Helioseismic Data Rajaguru, S. P., Hughes, S. J. & Thompson, M. J., 2004, Solar Physics, 220, 381
15	The Propagation of Coherent Waves Across Multiple Solar Magnetic Pores Grant, S. D. T., Jess, D. B., Stangalini, M., Jafarzadeh, S., Fedun, V., Verth, G., Keys, P. H., Rajaguru, S. P., Uitenbroek, H., MacBride, C. D., Bate, W. & Gilchrist-Millar, C. A., 2022, ApJ, 938, 143
15	Solar Physics at the Kodaikanal Observatory: A Historical Perspective Hasan, S. S., Mallik, D. C. V., Bagare, S. P. & Rajaguru, S. P., 2010, Magnetic Coupling between the Interior and Atmosphere of the Sun (Editors: Hasan, S. S. & Rutten, R. J.), Astrophysics and Space Science Proceedings, 19, p. 12
14	Properties of small-scale magnetism of stellar atmospheres Steiner, Oskar, Salhab, René, Freytag, Bernd, Rajaguru, Paul, Schaffenberger, Werner & Steffen, Matthias, 2014, Publications of the Astronomical Society of Japan, 66, S5
14	p-Mode Interaction with Sunspots Cally, P. S., Moradi, H. & Rajaguru, S. P., 2016, Geophysical Monograph Series, 216, 489
12	Wave analysis tools Jafarzadeh, Shahin, Jess, David B., Stangalini, Marco, Grant, Samuel D. T., Higham, Jonathan E., Pessah, Martin E., Keys, Peter H., Belov, Sergey, Calchetti, Daniele, Duckenfield, Timothy J., Fedun, Viktor, Fleck, Bernhard, Gafeira, Ricardo, Jefferies, Stuart M., Khomenko, Elena, Morton, Richard J., Norton, Aimee A., Rajaguru, S. P., Schiavo, Luiz A. C. A., Sharma, Rahul, Silva, Suzana S. A., Solanki, Sami K., Steiner, Oskar, Verth, Gary, Vigeesh, Gangadharan & Yadav, Nitin, 2025, Nature Reviews Methods Primers, 5, 21
12	Signatures of the impact of flare-ejected plasma on the photosphere of a sunspot light bridge Felipe, T., Collados, M., Khomenko, E., Rajaguru, S. P., Franz, M., Kuckein, C. & Asensio Ramos, A., 2017, A&A, 608, A97
12	Origin of Quasi-periodic Pulsation at the Base of a Kink-unstable Jet Mishra, Sudheer K., Sangal, Kartika, Kayshap, Pradeep, Jelínek, Petr, Srivastava, A. K. & Rajaguru, S. P., 2023, ApJ, 945, 113
12	Carbon Abundance of Stars in the LAMOST-Kepler Field Unni, Athira, Narang, Mayank, Sivarani, Thirupathi, Manoj, P., Banyal, Ravinder K., Surya, Arun, Rajaguru, S. P. & Swastik, C., 2022, The Astronomical Journal, 164, 181
12	Convective Intensification of Magnetic Flux Tubes in Stellar Photospheres Rajaguru, S. P., Kurucz, R. L. & Hasan, S. S., 2002, ApJ, 565, L101
11	Radiative Transfer Effects and the Dynamics of Small-Scale Magnetic Structures on the Sun Rajaguru, S. P. & Hasan, S. S., 2000, ApJ, 544, 522
11	Local Modulation of Solar Oscillations by Magnetic Fields Nicholas, C. J., Thompson, M. J. & Rajaguru, S. P., 2004, Solar Physics, 225, 213
10	Acoustic Wave Propagation in the Sun: Implications for Wave Field and Time-Distance Helioseismology Tong, C. H., Thompson, M. J., Warner, M. R., Rajaguru, S. P. & Pain, C. C., 2003, ApJ, 582, L121
10	Time-Distance Helioseismology of Deep Meridional Circulation Rajaguru, S. P. & Antia, H. M., 2020, Dynamics of the Sun and Stars; Honoring the Life and Work of Michael J. Thompson (Editors: Monteiro, Mário J. P. F. G., Garcia, Rafael A., Christensen-Dalsgaard, J\orgen & McIntosh, Scott W.), Astrophysics and Space Science Proceedings, 57, p. 107
10	Phase Shifts Measured in Evanescent Acoustic Waves above the Solar Photosphere and Their Possible Impacts on Local Helioseismology Zhao, Junwei, Rajaguru, S. P. & Chen, Ruizhu, 2022, ApJ, 933, 109
8	First steps with CO5BOLD using HLLMHD and PP reconstruction . Steiner, O., Rajaguru, S. P., Vigeesh, G., Steffen, M., Schaffenberger, W. & Freytag, B., 2013, Memorie della Societa Astronomica Italiana Supplementi, 24, 100
7	Structure and Dynamics of the Sun's Interior Revealed by the Helioseismic and Magnetic Imager Kosovichev, Alexander G., Basu, Sarbani, Bekki, Yuto, Buitrago-Casas, Juan Camilo, Chatzistergos, Theodosios, Chen, Ruizhu, Christensen-Dalsgaard, Jørgen, Donea, Alina, Fleck, Bernhard, Fournier, Damien, García, Rafael A., Getling, Alexander V., Gizon, Laurent, Gough, Douglas O., Hanasoge, Shravan, Hanson, Chris S., Hess Webber, Shea A., Hoeksema, J. Todd, Howe, Rachel, Jain, Kiran, Kasapis, Spiridon, Kashyap, Samarth G., Kitiashvili, Irina N., Komm, Rudolf, Korzennik, Sylvain G., Krivova, Natalie A., Kuhn, Jeffrey R., Liang, Zhi-Chao, Lindsey, Charles, Mahajan, Sushant S., Mandal, Krishnendu, Mani, Prasad, Martinez Oliveros, Juan Carlos, Mathur, Savita, Rabello Soares, M. Cristina, Rajaguru, S. Paul, Reiter, Johann, Rhodes, Edward J., Rozelot, Jean-Pierre, Scherrer, Philip H., Solanki, Sami K., Stefan, John T., Toomre, Juri, Tripathy, Sushanta C., Upton, Lisa A. & Zhao, Junwei, 2025, Solar Physics, 300, 70
5	Dynamics of Photospheric Magnetic Flux Distribution and Variations in Solar RVs: A Study Using HARPS-N Solar and SDO Observations Sen, Anisha & Rajaguru, S. P., 2023, ApJ, 956, 145
4	Relationships between Fluid Vorticity, Kinetic Helicity, and Magnetic Field on Small-scales (Quiet-Network) on the Sun Sangeetha, C. R. & Rajaguru, S. P., 2016, ApJ, 824, 120
4	A study of acoustic halos in active region NOAA 11330 using multi-height SDO observations Tripathy, S. C., Jain, K., Kholikov, S., Hill, F., Rajaguru, S. P. & Cally, P. S., 2018, Advances in Space Research, 61, 691
3	Application of Local-Area Helioseismic Methods as Predictors of Space Weather Jensen, J. M., Lundstedt, H., Thompson, M. J., Pijpers, F. P. & Rajaguru, S. P., 2004, SOHO 14 Helio- and Asteroseismology: Towards a Golden Future (Editors: Danesy, D.), ESA Special Publication, 559, p. 497
3	Separating surface magnetic effects in sunspot seismology: new time-distance helioseismic diagnostics Rajaguru, S. P., 2008, arXiv:0802.2756
3	Influence of magnetic field on the Doppler measurements of velocity field in the solar photosphere and implications for helioseismology Rajaguru, S. P., Wachter, R. & Hasan, S. S., 2006, Proceedings of the ILWS Workshop (Editors: Gopalswamy, N. & Bhattacharyya, A.), p. 21
3	Comparison of subsurface sound-speed structures of three active regions Couvidat, S., Birch, A. C., Rajaguru, S. P. & Kosovichev, A. G., 2006, Solar Activity and its Magnetic Origin (Editors: Bothmer, Volker & Hady, Ahmed Abdel), IAU Symposium, 233, p. 75
2	Reflection and Refraction of (Magneto-)Acoustic Waves at the Magnetic Canopy: Further Evidences from Multi-Height Seismic Data Rajaguru, S. P., Sun, X., Hayashi, K. & Couvidat, S., 2013, Fifty Years of Seismology of the Sun and Stars (Editors: Jain, K., Tripathy, S. C., Hill, F., Leibacher, J. W. & Pevtsov, A. A.), Astronomical Society of the Pacific Conference Series, 478, p. 345
2	Formation of Jet-driven Forced Reconnection Region and Associated Plasma Blobs in a Prominence Segment Mishra, Sudheer K., Srivastava, A. K., Rajaguru, S. P. & Jelínek, P., 2025, ApJ, 982, 147
2	Investigation of Phase Shift and Travel Time of Acoustic Waves in the Lower Solar Atmosphere Using Multiheight Velocities Kumar, Hirdesh, Kumar, Brajesh, Mathew, Shibu K., Bayanna, A. Raja & Rajaguru, S. P., 2024, ApJ, 972, 39
2	The Effect of Strong Magnetic Fields on Acoustic Power in Their Surroundings at the Surface of the Sun Nicholas, C. J., Thompson, M. J. & Rajaguru, S. P., 2004, SOHO 14 Helio- and Asteroseismology: Towards a Golden Future (Editors: Danesy, D.), ESA Special Publication, 559, p. 590
2	Solar Cycle Variations in Meridional Flows and Rotational Shear within the Sun's Near-surface Shear Layer Sen, Anisha, Rajaguru, S. P., Iyer, Abhinav Govindan, Chen, Ruizhu, Zhao, Junwei & Kholikov, Shukur, 2025, ApJ, 984, L1
1	Radiative Transfer Effects and Convective Collapse: Size(flux)-Strength Distribution for the Small-Scale Solar Magnetic Flux Tubes Rajaguru, S. & Hasan, S., 1999, High Resolution Solar Physics: Theory, Observations, and Techniques (Editors: Rimmele, T. R., Balasubramaniam, K. S. & Radick, R. R.), Astronomical Society of the Pacific Conference Series, 183, p. 53
1	Sunspot seismology: accounting for magnetohydrodynamic wave processes using imaging spectropolarimetry Rajaguru, S. P., 2012, arXiv:1206.5671
1	Comparison of GONG and MDI Sound-Speed Anomalies Beneath Two Active Regions Hughes, S. J., Rajaguru, S. P. & Thompson, M. J., 2004, SOHO 14 Helio- and Asteroseismology: Towards a Golden Future (Editors: Danesy, D.), ESA Special Publication, 559, p. 493
0	Hemispheric Magnetic Asymmetry and Cross-equatorial Circulation Cells within the Sun's Near-surface Shear Layer Sen, Anisha, Rajaguru, S. P., Chen, Ruizhu, Zhao, Junwei & Kholikov, Shukur, 2026, ApJ, 997, 57
0	Radiative Cooling, Convective Downflows and the Formation of Small-Scale Strong Magnetic Field Structures on the Sun Rajaguru, S. Paul & Hasan, S. S., 1999, SOHO-9 Workshop on Helioseismic Diagnostics of Solar Convection and Activity (Editors: Duvall, Jr., T. L. & Kosovichev, A. G.), 9, p. 16
0	Photospheric Flow Fields and Properties of Embedded Small-scale Magnetic Flux Concentrations Rajaguru, S. P., Srikanth, R. & Hasan, S. S., 2001, Recent Insights into the Physics of the Sun and Heliosphere: Highlights from SOHO and Other Space Missions (Editors: Brekke, P\ral, Fleck, Bernhard & Gurman, Joseph B.), IAU Symposium, 203, p. 205
0	Time-distance analysis of GONG+ data Rajaguru, S. P., Hughes, S. J. & Thompson, M. J., 2003, GONG+ 2002. Local and Global Helioseismology: the Present and Future (Editors: Sawaya-Lacoste, Huguette), ESA Special Publication, 517, p. 75
0	How Similar are Starspots to Sunspots? Rajaguru, S. P., Kurucz, R. L. & Hasan, S. S., 2005, Bulletin of the Astronomical Society of India, 33, 362
0	Systematic Errors in Dopplergrams of Active Regions and Their Correction Wachter, R. & Rajaguru, S. P., 2006, Solar Polarization 4 (Editors: Casini, R. & Lites, B. W.), Astronomical Society of the Pacific Conference Series, 358, p. 100
0	Correcting Dopplergrams for solar active regions: consequences for local helioseismology Wachter, R., Rajaguru, S. P. & Bogart, R. S., 2006, Proceedings of SOHO 18/GONG 2006/HELAS I, Beyond the spherical Sun (Editors: Fletcher, Karen & Thompson, Michael), ESA Special Publication, 624, p. 48
0	Sunspot seismology: accounting for magnetohydrodynamic wave processes using imaging spectropolarimetry Rajaguru, S. P., 2011, Astronomical Society of India Conference Series, Astronomical Society of India Conference Series, 2, p. 181
0	Solar physics in India: developments from the nineteenth century to the present era Hasan, S. S., Choudhuri, Arnab Rai & Rajaguru, S. P., 2011, Astronomical Society of India Conference Series, Astronomical Society of India Conference Series, 2, p. 367
0	Magnetohydrostatic equilibrium in starspots: dependences on color (Teff) and surface gravity (g) Rajaguru, S. P. & Hasan, S. S., 2011, Physics of Sun and Star Spots (Editors: Prasad Choudhary, Debi & Strassmeier, Klaus G.), IAU Symposium, 273, p. 276
0	Studies of waves in sunspots using spectropolarimetric observations MacDonald, Gordon A. & Rajaguru, S. P., 2011, Physics of Sun and Star Spots (Editors: Prasad Choudhary, Debi & Strassmeier, Klaus G.), IAU Symposium, 273, p. 361
0	A study of acoustic power maps over sunspot regions using HMI and AIA (1600 A and 1700 A) data Rajaguru, S. P. & Couvidat, S., 2011, SDO-3: Solar Dynamics and Magnetism from the Interior to the Atmosphere (Editors: Pesnell, W. Dean & Thompson, Barbara), p. 65
0	Effects of observation heights and atmospheric wave evolution in sunspot seismology: a study using HMI and AIA (1600 A and 1700 A) data Rajaguru, S. P. & Couvidaa, S., 2011, SDO-3: Solar Dynamics and Magnetism from the Interior to the Atmosphere (Editors: Pesnell, W. Dean & Thompson, Barbara), p. 66
0	Modeling approaches in helioseismology Rajaguru, S. P., 2015, Extraterrestrial Seismology (Editors: Tong, V. & Garci, R.), p.123
0	Twenty-one-year helioseismic measurement of solar meridional circulation from SOHO/MDI and SDO/HMI: Anomalous northern hemisphere during cycle 24 Liang, Zhi-Chao, Gizon, Laurent, Birch, Aaron C., Duvall, Thomas L., Jr. & Rajaguru, S. P., 2018, Catalyzing Solar Connections, p. 59
0	Signatures of Untwisting Magnetic Field in a Small Emerging Bipole in the Solar Photosphere Sangeetha, C. R., Tripathi, Durgesh & Rajaguru, S. P., 2020, ApJ, 895, 67
0	Determination of linear polarization of solar corona from observations of the eclipse of October 24, 1995. Srikanth, R., Sharma, M. & Rajaguru, S., 1997, Kodaikanal Observatory Bulletins, 13, 59