A. E. Hornschemeier
Brookhaven National Laboratory
10 Papers
72 Citations
A. E. Hornschemeier is an academic researcher from Brookhaven National Laboratory. The author has contributed to research in topics: Galaxy & Supermassive black hole. The author has an hindex of 4, co-authored 10 publications.
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Papers
Concurrent Supermassive Black Hole and Galaxy Growth: Linking Environment and Nuclear Activity in z = 2.23 H-alpha Emitters
Bret Lehmer,Adrian B. Lucy,David M. Alexander,P. N. Best,James E. Geach,Christopher Harrison,A. E. Hornschemeier,Yoichi Matsuda,James Mullaney,Ian Smail,David Sobral,A. M. Swinbank +11 more
TL;DR: In this paper, the 2QZ cluster 1004+00 structure at z = 2.23 was identified as an overdensity of four optically-selected QSOs within a 15x15 arcmin^2 region, with 2-10 keV luminosities of ~(8-60) x 10^43 ergs/s and X-ray spectral slopes consistent with unobscured AGN.
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The Fall of AGN and the Rise of Star-Forming Galaxies: A Close Look at the Chandra Deep Field X-ray Number
Franz E. Bauer,D. M. Alexander,W. N. Brandt,D. P. Schneider,Ezequiel Treister,A. E. Hornschemeier,Gordon P. Garmire +6 more
- 30 Jul 2004
TL;DR: In this article, the authors investigate the X-ray number counts in the 1-2 Ms Chandra Deep Fields (CDFs) to determine the contributions of faint Xray source populations to the extragalactic Xray background (XRB).
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Deep uv luminosity functions at the infall region of the coma cluster
D. Hammer,A. E. Hornschemeier,Samir Salim,Russell A. Smith,L. Jenkins,Bahram Mobasher,Neal A. Miller,Henry C. Ferguson +7 more
TL;DR: In this article, the authors used deep GALEX observations at the infall region of the Coma cluster to measure the faintest UV luminosity functions (LFs) presented for a rich galaxy cluster thus far.
•Posted Content
The evolution of galaxy clusters across cosmic time
M. Arnaud,Hans Böhringer,C. Jones,Brian R. McNamara,Takaya Ohashi,Daniel J. Patnaude,Keith A. Arnaud,Mark W. Bautz,Alain Blanchard,J. D. Bregman,G. Chartas,J. H. Croston,L. P. David,Megan Donahue,A. C. Fabian,Alexis Finoguenov,Akihiro Furuzawa,Sarah Gallagher,Yoshito Haba,A. E. Hornschemeier,Sebastian Heinz,Jelle Kaastra,W. Kapferer,G. Lamer,Andisheh Mahdavi,Kazuo Makishima,Kyoko Matsushita,Kazuhiro Nakazawa,Paul Nulsen,P. M. Ogle,Eric S. Perlman,Trevor J. Ponman,Daniel Proga,Gabriel W. Pratt,Scott W. Randall,Thomas H. Reiprich,Gordon T. Richards,Kathy Romer,Mateusz Ruszkowski,R. W. Schmidt,R. Smith,Harvey Tananbaum,Alexey Vikhlinin,J. Vrtilek,Diana M Worrall +44 more
TL;DR: In this paper, high-resolution X-ray observations of the evolving cluster population provide a unique opportunity to address such open and fundamental questions as: How do hot diffuse baryons dynamically evolve in dark matter potentials? How and when was the excess energy which we observe in the intergalactic medium generated? What is the cosmic history of heavy-element production and circulation?
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The Growth of Supermassive Black Holes Across Cosmic Time
Kirpal Nandra,James Aird,D. M. Alexander,David R. Ballantyne,Xavier Barcons,Franz E. Bauer,Thomas Boller,W. N. Brandt,Marcella Brusa,A. Cattaneo,George Chartas,Alison L. Coil,Andrea Comastri,D. J. Croton,R. Della Ceca,Mark Dickinson,A. C. Fabian,G. G. Fazio,Fabrizio Fiore,Kathryn Flanagan,William R. Forman,N. Gehrels,A. Georgakakis,I. Georgantopoulos,Roberto Gilli,Günther Hasinger,Philip F. Hopkins,A. E. Hornschemeier,Rob Ivison,G. Kauffmann,Andrew J. King,Anton M. Koekemoer,D. C. Koo,Hideyo Kunieda,E. S. Laird,N. A. Levenson,Y. Li,Piero Madau,Takaya Ohashi,Ken Pounds,J. R. Promack,P. Ranall,George R. Ricker,E. Rossi,Ohad Shemmer,Rachel S. Somerville,D. Stern,Massimo Stiavelli,Harvey Tananbaum,Yuichi Terashima,E. Treister,Y. Ueda,C. Vignali,M. G. Watson,N. E. White,Simon D. M. White +55 more
- 01 Jan 2009
TL;DR: In this paper, the formation of typical SMBH at z>6 and their subsequent growth over cosmic time is charted using X-ray observations, which is most effectively achieved with Xray observations.
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