Monitoring the first candidate host for the merger of a Supermassive Black Hole Binary with H.E.S.S.
On behalf of the Hess Collaboration,
F. Aharonian,
F. Ait-Benkhali,
A. Alkan,
J. Aschersleben,
H. Ashkar,
M. Backes, A. Baktash, V. Barbosa Martins, A. Barnacka, J. Barnard, R.W. Batzofin, Y. Becherini, G. Beck, D. Berge, K. Bernloehr, B. Bi, M. Boettcher, C. Boisson, J. Bolmont, M. Bony (de), J. Borowska, M. Bouyahiaoui, F. Bradascio, M. Breuhaus, R. Brose, A. Brown, F. Brun, B. Bruno, T. Bulik, C. Burger-Scheidlin, T. Bylund, F. Cangemi, S. Caroff, S. Casanova, R. Cecil, J. Celic, M. Cerruti, P. Chambéry, T.B. Chand, S. Chandra, A. Chen, J.O. Chibueze, O. Chibueze, T. Collins, G. Cotter, P. Cristofari, J. Damascene Mbarubucyeye, I.D. Davids, J. Davies, L. de Jonge, J. Devin, A. Djannati-Ataï, J.I. Djuvsland, A. Dmytriiev, V. Doroshenko, L. Dreyer, L. Du Plessis, K. Egberts, S. Einecke, J.P. Ernenwein, S. Fegan, K. Feijen, G. Fichet de Clairfontaine, G. Fontaine, L. Frans, M. Fuessling, S. Funk, S. Gabici, Y. Gallant, S. Ghafourizadeh, G. Giavitto, L. Giunti, D. Glawion, J.F. Glicenstein, J. Glombitza, P. Goswami, G. Grolleron, M.H. Grondin, L. Haerer, S. Hattingh, M. Haupt, G. Hermann, J. Hinton, W. Hofmann, T. Holch, M. Holler, D. Horns, Z.Q. Huang, A. Jaitly*, M. Jamrozy, F. Jankowsky, A. Jardin-Blicq, V. Joshi, I. Jung-Richardt, E. Kasai, K. Katarzynski, H. Katjaita, D. Khangulyan, R. Khatoon, B. Khelifi, S. Klepser, W. Kluzniak, N. Komin, R. Konno, K. Kosack, D. Kostunin, A. Kundu, G. Lamanna, R.G. Lang, S. Le Stum, V. Lefranc, F. Leitl, A. Lemiere, M. Lemoine-Goumard, J.P. Lenain, F. Leuschner, A. Luashvili, I. Lypova, J. Mackey, D. Malyshev, D. Malyshev, V. Marandon, A. Marcowith, P.D. Marinos, G. Marti'i-Devesa, R. Marx, G. Maurin, A. Mehta, P. Meintjes, M. Meyer, A. Mitchell, R. Moderski, L. Mohrmann, A. Montanari, C. Moore, E. Moulin, T. Murach, K. Nakashima, M. Naurois (de), H. Ndiyavala, J. Niemiec, A. Noel, P. O'Brien, S. Ohm, L. Olivera-Nieto, E. Ona-Wilhelmi (de), M. Ostrowski, E. Oukacha, S. Panny, M. Panter, D. Parsons, U. Pensec, G. Peron, S. Pita, V. Poireau, D. Prokhorov, H. Prokoph, G. Puehlhofer, M. Punch, A. Quirrenbach, M. Regeard, P. Reichherzer, A. Reimer, O. Reimer, I. Reis, Q. Remy, H.X. Ren, M. Renaud, B. Reville, F. Rieger, G. Roellinghoff, E. Rol, G.P. Rowell, B. Rudak, H. Rueda Ricarte, E. Ruiz Velasco, K. Sabri, V. Sahakian, S. Sailer, H. Salzmann, D. Sanchez, A. Santangelo, M. Sasaki, J. Schaefer, F. Schüssler, H. Schutte, M. Senniappan, J.N.S. Shapopi, S. Shilunga, K. Shiningayamwe, H. Sol, H. Spackman, A. Specovius, S. Spencer, L. Stawarz, R. Steenkamp, C. Stegmann, S. Steinmassl, C. Steppa, K. Streil, I. Sushch, H. Suzuki, T. Takahashi, T. Tanaka, T. Tavernier, A. Taylor, R. Terrier, A. Thakur, H. Thiersen, C. Thorpe-Morgan, M. Tluczykont, M. Tsirou, N. Tsuji, R. Tuffs, Y. Uchiyama, M. Ullmo, T. Unbehaun, P. van der Merwe, C. van Eldik, B. van Soelen, G. Vasileiadis, M. Vecchi, J. Veh, C. Venter, J. Vink, H. Voelk, N. Vogel, T. Wach, S. Wagner, F. Werner, R. White, A. Wierzcholska, Y.W. Wong, H.M. Yassin, M. Zacharias, D. Zargaryan, A. Zdziarski, A. Zech, S. Zhu, A. Zmija, S. Zouari and N. Żywuckaet al. (click to show)*: corresponding author
Pre-published on:
August 09, 2023
Published on:
September 27, 2024
Abstract
Supermassive black hole binary (SMBHB) is a result of galaxies coalescing, when two supermas-
sive black holes form a hard binary with distances from kpc to pc. If the system reaches milliparsec
separation, the black holes eventually merge. There are a growing number of few sub-pc SMBHB
candidates, one of which according to Jiang et al (2022). will merge within three years. We have
performed the monitoring of the host galaxy SDSSJ143016.05+230344.4 during its visibility with
H.E.S.S. in April–July 2022. Given that subsequent follow-up observations with optical and X-ray
instruments have not confirmed some of the predictions initially presented, and time constraints
for the merger beyond 2022 are less precise, we changed our monitoring and follow-up strategy
for further observations. In this work we present our results of the monitoring and discuss the
prospects of these kind of observations with imaging atmospheric Cherenkov telescopes.
DOI: https://doi.org/10.22323/1.444.0688
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