Venkatessh Ramakrishnan

The persistent shadow of the supermassive black hole of M87: II. Model comparisons and theoretical interpretations

Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, John E. Carlstrom, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, Thomas M. Crawford, Geoffrey B. Crew, Dong Jin Kim, Zhiyuan Li, Venkatessh Ramakrishnan, Tuomas Savolainen, Jan Wagner, Jasmin E. Washington, Kaj Wiik 2025 Astronomy & Astrophysics

Origin of the ring ellipticity in the black hole images of M87

Rohan Dahale, Ilje Cho, Kotaro Moriyama, Kaj Wiik, Paul Tiede, José L. Gómez, Chi Kwan Chan, Roman Gold, Vadim Y. Bernshteyn, Marianna Foschi, Britton Jeter, Hung Yi Pu, Boris Georgiev, Abhishek V. Joshi, Alejandro Cruz-Osorio, Iniyan Natarajan, Avery E. Broderick, León D.S. Salas, Koushik Chatterjee, Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Roger Brissenden, Silke Britzen, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Douglas Ferreira Carlos, Venkatessh Ramakrishnan, Tuomas Savolainen, Jasmin E. Washington 2025 Astronomy & Astrophysics

Tracking X-Ray Variability in Next-generation EHT Low-luminosity Active Galactic Nucleus Targets

Nicole M. Ford, Michael Nowak, Venkatessh Ramakrishnan, Daryl Haggard, Kristen Dage, Dhanya G. Nair, Chi Kwan Chan 2025 Astrophysical Journal

First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA

Ciriaco Goddi, Douglas F. Carlos, Geoffrey B. Crew, Lynn D. Matthews, Hugo Messias, Alejandro Mus, Iván Martí-Vidal, Ezequiel Albentosa-Ruíz, Mariafelicia De Laurentis, Elisabetta Liuzzo, Nicola Marchili, Kazi L.J. Rygl, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Balokoviä, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Michael Bremer, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, John E. Carlstrom, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Venkatessh Ramakrishnan, Tuomas Savolainen, Jasmin E. Washington, Kaj Wiik 2025 Astronomy & Astrophysics

Gamma-ray flares from the jet of the blazar CTA 102 in 2016–2018

Sanghyun Kim, Sang Sung Lee, Juan Carlos Algaba, Bindu Rani, Jongho Park, Hyeon Woo Jeong, Whee Yeon Cheong, Filippo D’Ammando, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi, Venkatessh Ramakrishnan, Iván Agudo, Carolina Casadio, Juan Escudero, Antonio Fuentes, Efthalia Traianou, Ioannis Myserlis, Clemens Thum 2025 Astronomy & Astrophysics

Keplerian molecular gas disk and black hole mass of NGC 4751

J. Osorno, N. Nagar, T. Richtler, V. Ramakrishnan, C. Finlez, H. Messias, K. Gültekin, K. Gebhardt, P. Teuben 2025 Astronomy & Astrophysics

A multifrequency study of sub-parsec jets with the Event Horizon Telescope

Jan Röder, Maciek Wielgus, Andrei P. Lobanov, Thomas P. Krichbaum, Dhanya G. Nair, Sang Sung Lee, Eduardo Ros, Vincent L. Fish, Lindy Blackburn, Chi Kwan Chan, Sara Issaoun, Michael Janssen, Michael D. Johnson, Sheperd S. Doeleman, Geoffrey C. Bower, Geoffrey B. Crew, Remo P.J. Tilanus, Tuomas Savolainen, C. M. Violette Impellizzeri, Antxon Alberdi, Anne Kathrin Baczko, José L. Gómez, Ru Sen Lu, Georgios F. Paraschos, Efthalia Traianou, Ciriaco Goddi, Daewon Kim, Mikhail Lisakov, Yuri Y. Kovalev, Petr A. Voitsik, Kirill V. Sokolovsky, Kazunori Akiyama, Ezequiel Albentosa-Ruíz, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Dong Jin Kim, Zhiyuan Li, Venkatessh Ramakrishnan, Jan Wagner, Jasmin E. Washington, Kaj Wiik 2025 Astronomy & Astrophysics

Accessing a New Population of Supermassive Black Holes with Extensions to the Event Horizon Telescope

Xinyue Alice Zhang, Angelo Ricarte, Dominic W. Pesce, Michael D. Johnson, Neil Nagar, Ramesh Narayan, Venkatessh Ramakrishnan, Sheperd Doeleman, Daniel C.M. Palumbo 2025 Astrophysical Journal

Shared-optical-path VLBI frequency phase transfer from 86 to 258 GHz on an 8600km baseline: Demonstrated with the APEX and IRAM 30m telescopes

G. Y. Zhao, A. L. Roy, J. F. Wagner, E. Donoso, P. Torne, E. Ros, M. Lindqvist, A. P. Lobanov, V. Ramakrishnan, T. P. Krichbaum, H. Rottmann, J. A. Zensus, J. P. Pérez-Beaupuits, B. Klein, K. M. Menten, O. Ricken, N. Reyes, S. Sánchez, I. Ruiz, C. Durán, D. John, J. L. Santaren, M. Sánchez-Portal, M. Bremer, C. Kramer, K. F. Schuster, M. J. Rioja, R. Dodson 2025 Astronomy & Astrophysics

First Sagittarius A∗ Event Horizon Telescope Results. VIII. Physical Interpretation of the Polarized Ring

Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Uwe Bach, Anne Kathrin Baczko, David Ball, Mislav Baloković, Bidisha Bandyopadhyay, John Barrett, Michi Bauböck, Bradford A. Benson, Dan Bintley, Lindy Blackburn, Raymond Blundell, Katherine L. Bouman, Geoffrey C. Bower, Hope Boyce, Michael Bremer, Christiaan D. Brinkerink, Roger Brissenden, Silke Britzen, Avery E. Broderick, Dominique Broguiere, Thomas Bronzwaer, Sandra Bustamante, Do Young Byun, John E. Carlstrom, Chiara Ceccobello, Andrew Chael, Chi Kwan Chan, Dominic O. Chang, Koushik Chatterjee, Shami Chatterjee, Ming Tang Chen, Yongjun Chen, Xiaopeng Cheng, Ilje Cho, Pierre Christian, Nicholas S. Conroy, John E. Conway, James M. Cordes, Thomas M. Crawford, Venkatessh Ramakrishnan, Tuomas Savolainen, Jasmin E. Washington, Kaj Wiik 2024 Astrophysical Journal Letters

Publications