Zobrazeno 1 - 10
of 1 259
pro vyhledávání: '"Buchner, Johannes"'
Autor:
Giustini, Margherita, Miniutti, Giovanni, Arcodia, Riccardo, Goodwin, Adelle, Alexander, Kate D., Chakraborty, Joheen, Buchner, Johannes, Kosec, Peter, Saxton, Richard, Bonetti, Matteo, Franchini, Alessia, Ryu, Taeho, Shu, Xinwen, Kara, Erin, Ponti, Gabriele, Quintin, Erwan, Vincentelli, Federico, Webb, Natalie, Kajava, Jari, von Fellenberg, Sebastiano D.
Quasi-periodic eruptions (QPEs) are an extreme X-ray variability phenomenon associated with low-mass supermassive black holes. First discovered in the nucleus of the galaxy GSN 069, they have been so far securely detected in five other galaxies, incl
Externí odkaz:
http://arxiv.org/abs/2409.01938
Autor:
Buchner, Johannes
Publikováno v:
A&A 689, L2 (2024)
The gas reservoir of galaxies can be altered by outflows driven by star-formation and luminous active galactic nuclei. Jets heating the surroundings of host galaxies can also prevent gas cooling and inflows. Spectacular examples for these three mass
Externí odkaz:
http://arxiv.org/abs/2407.11127
Autor:
Hagen, Scott, Done, Chris, Silverman, John D., Li, Junyao, Liu, Teng, Ren, Wenke, Buchner, Johannes, Merloni, Andrea, Nagao, Tohru, Salvato, Mara
The structure of the accretion flow onto supermassive black holes (SMBH) is not well understood. Standard disc models match to zeroth order in predicting substantial energy dissipation within optically-thick material producing a characteristic strong
Externí odkaz:
http://arxiv.org/abs/2406.06674
Autor:
Buchner, Johannes, Starck, Hattie, Salvato, Mara, Netzer, Hagai, Igo, Zsofi, Laloux, Brivael, Georgakakis, Antonis, Gauger, Isabelle, Olechowska, Anna, Lopez, Nicolas, Shankar, Suraj D, Li, Junyao, Nandra, Kirpal, Merloni, Andrea
The assembly and co-evolution of supermassive black holes (SMBH) and their host galaxy stellar population is a key open questions in galaxy evolution. Stellar mass ($M_\star$) and star formation rate (SFR), are inferred by modeling the spectral energ
Externí odkaz:
http://arxiv.org/abs/2405.19297
Autor:
Martínez-Ramírez, L. N., Rivera, G. Calistro, Lusso, Elisabeta, Bauer, F. E., Nardini, Emanuele, Buchner, Johannes, Brown, Michael J. I., Pineda, Juan C. B., Temple, Matthew J., Banerji, Manda, Stalevski, M., Hennawi, Joseph F.
We present new frontiers in the modelling of the spectral energy distributions (SED) of active galaxies by introducing the radio-to-X-ray fitting capabilities of the publicly available Bayesian code AGNfitter. The new code release, called AGNfitter-r
Externí odkaz:
http://arxiv.org/abs/2405.12111
Autor:
Kini, Yves, Salmi, Tuomo, Vinciguerra, Serena, Watts, Anna L., Bilous, Anna, Galloway, Duncan K., van der Wateren, Emma, Khalsa, Guru Partap, Bogdanov, Slavko, Buchner, Johannes, Suleimanov, Valery
Pulse profile modelling (PPM) is a comprehensive relativistic ray-tracing technique employed to determine the properties of neutron stars. In this study, we apply this technique to the Type I X-ray burster and accretion-powered millisecond pulsar XTE
Externí odkaz:
http://arxiv.org/abs/2405.10717
Autor:
Liu, Teng, Merloni, Andrea, Sanders, Jeremy, Ponti, Gabriele, Strong, Andrew, Yeung, Michael, Locatelli, Nicola, Predehl, Peter, Zheng, Xueying, Sasaki, Manami, Freyberg, Michael, Dennerl, Konrad, Becker, Werner, Nandra, Kirpal, Mayer, Martin, Buchner, Johannes
There are two contradictory views of the eROSITA bubbles: either a 10 kpc-scale pair of giant bubbles blown by the Galactic center (GC), or a 100 pc-scale local structure coincidentally located in the direction of GC. A key element of this controvers
Externí odkaz:
http://arxiv.org/abs/2405.04264
Autor:
Gan, Tianjun, Guo, Kangrou, Liu, Beibei, Wang, Sharon X., Mao, Shude, Buchner, Johannes, Fulton, Benjamin J.
We propose a second-order statistic parameter $\varepsilon$, the relative occurrence rate between hot and cold Jupiters ($\varepsilon=\eta_{\rm HJ}/\eta_{\rm CJ}$), to probe the migration of gas giants. Since the planet occurrence rate is the combine
Externí odkaz:
http://arxiv.org/abs/2404.07033
Autor:
Kocevski, Dale D., Finkelstein, Steven L., Barro, Guillermo, Taylor, Anthony J., Calabrò, Antonello, Laloux, Brivael, Buchner, Johannes, Trump, Jonathan R., Leung, Gene C. K., Yang, Guang, Dickinson, Mark, Pérez-González, Pablo G., Pacucci, Fabio, Inayoshi, Kohei, Somerville, Rachel S., McGrath, Elizabeth J., Akins, Hollis B., Bagley, Micaela B., Bisigello, Laura, Bowler, Rebecca A. A., Carnall, Adam, Casey, Caitlin M., Cheng, Yingjie, Cleri, Nikko J., Costantin, Luca, Cullen, Fergus, Davis, Kelcey, Donnan, Callum T., Dunlop, James S., Ellis, Richard S., Ferguson, Henry C., Fujimoto, Seiji, Fontana, Adriano, Giavalisco, Mauro, Grazian, Andrea, Grogin, Norman A., Hathi, Nimish P., Hirschmann, Michaela, Huertas-Company, Marc, Holwerda, Benne W., Illingworth, Garth, Juneau, Stéphanie, Kartaltepe, Jeyhan S., Koekemoer, Anton M., Li, Wenxiu, Lucas, Ray A., Magee, Dan, Mason, Charlotte, McLeod, Derek J., McLure, Ross J., Napolitano, Lorenzo, Papovich, Casey, Pirzkal, Nor, Rodighiero, Giulia, Santini, Paola, Wilkins, Stephen M., Yung, L. Y. Aaron
We present a sample of 341 "little red dots" (LRDs) spanning the redshift range $z\sim2-11$ using data from the CEERS, PRIMER, JADES, UNCOVER and NGDEEP surveys. These sources are likely heavily-reddened AGN that trace a previously-hidden phase of du
Externí odkaz:
http://arxiv.org/abs/2404.03576
Autor:
Laloux, Brivael, Georgakakis, Antonis, Alexander, David M., Buchner, Johannes, Andonie, Carolina, Acharya, Nischal, Aird, James, Alonso-Tetilla, Alba V., Bongiorno, Angela, Hickox, Ryan C., Lapi, Andrea, Musiimenta, Blessing, Almeida, Cristina Ramos, Vellforth, Carolin, Shankar, Francesco
We adopt a Bayesian X-ray spectral approach to investigate the accretion properties of unobscured ($20<\log(N_{\rm H}/{\rm cm}^{-2}<22$) and obscured ($22< \log(N_{\rm H}/{\rm cm}^{-2}<24$) active galactic nuclei (AGN) to shed light on the orientatio
Externí odkaz:
http://arxiv.org/abs/2403.07109