Results 11 to 20 of about 32,039 (196)

Mass Functions of Supermassive Black Holes across Cosmic Time [PDF]

Advances in Astronomy, 2012
The black hole mass function of supermassive black holes describes the evolution of the distribution of black hole mass. It is one of the primary empirical tools available for mapping the growth of supermassive black holes and for constraining ...
Brandon C. Kelly, Andrea Merloni
doaj   +4 more sources

Close supermassive binary black holes [PDF]

Nature, 2010
Nature in press. 4 pages, 1 figure [Title, abstract, text, and references shortened to conform to journal requirements]
Gaskell, C. Martin
openaire   +4 more sources

Supermassive Black Holes in Bulges [PDF]

The Astrophysical Journal, 2001
26 pages, 11 Postscript figures, accepted for publication on ...
Sarzi, Marc, Rix, Hans-Walter, Shields, Joseph C., Rudnick, Greg, Ho, Luis C., McIntosh, Daniel H., Filippenko, Alexei V., Sargent, Wallace L. W.   +7 more
openaire   +4 more sources

Formation of supermassive black holes [PDF]

The Astronomy and Astrophysics Review, 2010
To appear in The Astronomy and Astrophysics Review.
A Freise, A Heger, A Loeb, A Marconi, A Marconi, A Merloni, A Merloni, A Sesana, A Soltan, AJ Barth, AJ Barth, AM Ghez, AV Gruzinov, B Devecchi, BJ Carr, BJ Carr, C Alcock, C Lacey, CF McKee, CJ Willott, CJ Willott, CL Fryer, D Merritt, D Reed, D Spolyar, DJ Eisenstein, DN Page, E Berti, E Gallo, E Quataert, E Ripamonti, E Ripamonti, EH Wehner, F Hoyle, F Iocco, F Santoro, FC Bosch van den, G Ghisellini, G Lodato, HJ Mo, I Shlosman, J Diemand, J Kormendy, J Magorrian, JA Regan, JC Tan, JC Vernaleo, JE Greene, JF Navarro, JH Wise, JL Johnson, JR Bond, JS Bullock, K Freese, K Gebhardt, K Gebhardt, K Gültekin, K Omukai, K Omukai, KG Arun, L Ferrarese, L Ferrarese, L Ferrarese, L Gao, L Spitzer, LC Ho, M Ajello, M Dijkstra, M Elvis, M Freitag, M Freitag, M Mateo, M Milosavljević, M Ricotti, M Saijo, M Shibata, M Spaans, M Tegmark, M Trenti, M Valluri, M Volonteri, M Volonteri, M Volonteri, M Volonteri, M Volonteri, M Walter, MA Abramowicz, MA Abramowicz, MA Gürkan, MA Gürkan, Marta Volonteri, MC Aller, MC Begelman, MC Begelman, MC Begelman, MC Begelman, MC Begelman, MC Begelman, MC Miller, MG Haehnelt, MG Walker, MG Walker, MJ Turk, MS Bovill, MY Khlopov, N Häring, N Yoshida, NY Gnedin, P Côté, P Madau, PC Clark, PF Hopkins, Q Yu, R Decarli, R Salvaterra, R Schneider, R Schödel, RD Blandford, RD Blandford, RK Sheth, RP Kudritzki, S Hawking, S Tremaine, SA Hughes, SDM White, SE Woosley, SF Portegies Zwart, SF Portegies Zwart, SF Portegies Zwart, SL Shapiro, SM Koushiappas, SP Oh, SR Majewski, T Abel, T Ebisuzaki, T Tanaka, TH Greif, TW Baumgarte, V Bromm, V Bromm, V Bromm, V Springel, VR Eke, W Zhang, X Fan, X Fan, X Fan, YB Zeldovich, YB Zel’Dovich, Z Barkat, Z Haiman   +150 more
openaire   +3 more sources

Evolution of Supermassive Black Holes [PDF]

, 2007
Supermassive black holes (SMBHs) are nowadays believed to reside in most local galaxies, and the available data show an empirical correlation between bulge luminosity - or stellar velocity dispersion - and black hole mass, suggesting a single mechanism for assembling black holes and forming spheroids in galaxy halos. The evidence is therefore in favour
A. Cattaneo, A. Loeb, A. Marconi, A. Marconi, A. Merloni, A. Streblyanska, A.J. Barth, A.J. Barth, A.M. Ghez, A.M. Ghez, B.J. Carr, C.J. Willott, C.L. Fryer, D.J. Eisenstein, G. Fabbiano, G. Kauffmann, G. Miniutti, G.D. Quinlan, H. Mii, J. Crummy, J. Etherington, J. Magorrian, J. Yoo, J.S.B. Wyithe, J.S.B. Wyithe, K. Gebhardt, L. Ferrarese, L. Ferrarese, M. Elvis, M. Milosavljevic, M. Volonteri, M. Volonteri, M. Volonteri, M.C. Aller, M.C. Begelman, M.G. Haehnelt, N. Häring, P. Madau, Q. Yu, Q. Yu, R. Schödel, R.R. Islam, S. Tremaine, S.L. Shapiro, S.L. Shapiro, S.M. Koushiappas, T. Matteo di, V. Bromm, V. Springel, z. Haiman   +49 more
openaire   +4 more sources

Decomposition of the central structure of NGC 2273 in the NIR: A case study

Astronomische Nachrichten, Volume 344, Issue 10, December 2023., 2023
Abstract The Seyfert 2 galaxy NGC 2273 is a prime target to explore how active nuclei can be fed. It has a star‐forming innermost nuclear ring with a radius of 0.33kpc from where material may be funneled to the supermassive black hole in its center. In this article, we discuss high‐resolution adaptive optics aided JHKs images of NGC 2273 taken with the
L. Schey, J. Heidt, A. Pramskiy, D. Thompson, G. Agapito, S. Esposito, R. Gredel, D. Miller, E. Pinna, A. Puglisi, F. Rossi, W. Seifert, G. Taylor, A. Quirrenbach   +13 more
wiley   +1 more source

The potsdam arrayed waveguide spectrograph: A demonstrator of a cross‐dispersed integrated photonic spectrograph developed for the astronomical H‐band

Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023
The Potsdam Arrayed Waveguide Spectrograph (PAWS) is based on an integrated photonic spectrograph designed and developed by innoFSPEC to work in the astronomical H‐band. PAWS demonstrates how a traditional bulk optics spectrograph can be miniaturized and additionally serves as a tool for testing in‐house developed astrophotonical devices.
Eloy Hernandez, Alan Günther, Andreas Stoll, Svend‐Marian Bauer, Stella Vješnica, Kalaga Madhav, Martin M. Roth   +6 more
wiley   +1 more source

PAWS and POCO: NIR Astrophotonic Instruments for Astronomy

Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023
Abstract For near‐infrared ground and space‐based astronomy, compact photonic devices can replace the large bulk optical components in spectrographs, frequency combs, beam combiners, and sky subtraction filters, thus saving cost, reducing volume, weight, and power requirements.
Kalaga Madhav, Alan Günther, Eloy Hernandez, Stella Vjes̆nica, Daniel Bodenmüller, Andreas Stoll, Christer Sandin, Haydar Altuğ Yıldırım, Martin M. Roth   +8 more
wiley   +1 more source

Characterization of a C‐RED One camera for astrophotonical applications

Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023
Abstract To better understand the impact of the avalanche gain applied in the detector technology and apply this technology in our in‐house astrophotonic projects, we have characterized a C‐RED One camera and produced a stable and reliable method for calculating the system gain at any desired avalanche gain setting.
Stella Vješnica, Eloy Hernandez, Kalaga Madhav, Martin M. Roth   +3 more
wiley   +1 more source

Perturbative Solution of the Einstein Constraints with Spin and Momentum Far Away From a Binary Source in the Bowen‐York Formalism

Fortschritte der Physik, Volume 71, Issue 8-9, September 2023., 2023
Abstract The momentum and Hamiltonian constraints of vacuum Einstein equations, within the Bowen‐York formalism, for two interacting black holes in close separation, with anti‐parallel spins and anti‐parallel linear momenta is studied. An analytical solution using perturbation theory is given.
Emel Altas, Emine Ertugrul, Bayram Tekin
wiley   +1 more source