Search: WFRF:(Koekemoer A. M.) >
The deepest X-ray v...
The deepest X-ray view of high-redshift galaxies : Constraints on low-rate black hole accretion
-
- Vito, F. (author)
- INAF Osservatorio Astronomico di Bologna,Pennsylvania State University,University of Bologna
-
- Gilli, R. (author)
- INAF Osservatorio Astronomico di Bologna
-
- Vignali, C. (author)
- University of Bologna,INAF Osservatorio Astronomico di Bologna
-
show more...
-
- Brandt, W. N. (author)
- Pennsylvania State University
-
- Comastri, A. (author)
- INAF Osservatorio Astronomico di Bologna
-
- Yang, G. (author)
- Pennsylvania State University
-
- Lehmer, B. D. (author)
- University of Arkansas - Fayetteville
-
- Luo, B. (author)
- Nanjing University
-
- Basu-Zych, A. (author)
- NASA Goddard Space Flight Center,University of Maryland, Baltimore
-
- Bauer, F. E. (author)
- Millennium Institute for Astrophysics,Pontifical Catholic University of Chile,Space Science Institute
-
- Cappelluti, N. (author)
- Yale University
-
- Koekemoer, A. (author)
- Space Telescope Science Institute
-
- Mainieri, V. (author)
- European Southern Observatory
-
- Paolillo, M. (author)
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli,University of Naples Federico II,Italian Space Agency
-
- Ranalli, P. (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
-
Shemmer, O. (author)
-
- Trump, J. (author)
- Pennsylvania State University
-
- Wang, J. X. (author)
- Shanghai Astronomical Observatory, Chinese Academy of Sciences
-
- Xue, Y. Q. (author)
- Shanghai Astronomical Observatory, Chinese Academy of Sciences
-
show less...
-
(creator_code:org_t)
- 2016-08-10
- 2016
- English 27 s.
-
In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 463:1, s. 348-374
- Related links:
-
http://dx.doi.org/10...
-
show more...
-
http://arxiv.org/pdf...
-
https://lup.lub.lu.s...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- We exploit the 7 Ms Chandra observations in the Chandra Deep Field-South (CDF-S), the deepest X-ray survey to date, coupled with CANDELS/GOODS-S data, to measure the total X-ray emission arising from 2076 galaxies at 3.5 ≤ z < 6.5. This aim is achieved by stacking the Chandra data at the positions of optically selected galaxies, reaching effective exposure times of ≥109s.We detect significant (>3.7s) X-ray emission from massive galaxies at z ≈ 4. We also report the detection of massive galaxies at z ≈ 5 at a 99.7 per cent confidence level (2.7σ), the highest significance ever obtained for X-ray emission from galaxies at such high redshifts. No significant signal is detected from galaxies at even higher redshifts. The stacking results place constraints on theBHADassociated with the known high-redshift galaxy samples, as well as on the SFRD at high redshift, assuming a range of prescriptions for X-ray emission due to X- ray binaries.We find that the X-ray emission from our sample is likely dominated by processes related to star formation. Our results show that low-rate mass accretion on to SMBHs in individually X-ray-undetected galaxies is negligible, compared with the BHAD measured for samples of X-ray detected AGN, for cosmic SMBH mass assembly at high redshift. We also place, for the first time, constraints on the faint-end of the AGN X-ray luminosity function (logLX ~ 42) at z > 4, with evidence for fairly flat slopes. The implications of all of these findings are discussed in the context of the evolution of the AGN population at high redshift.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Galaxies: active
- Galaxies: evolution
- Galaxies: high
- methods: data analysis
- Redshift
- Surveys
- X-rays: galaxies
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
-
Vito, F.
-
Gilli, R.
-
Vignali, C.
-
Brandt, W. N.
-
Comastri, A.
-
Yang, G.
-
show more...
-
Lehmer, B. D.
-
Luo, B.
-
Basu-Zych, A.
-
Bauer, F. E.
-
Cappelluti, N.
-
Koekemoer, A.
-
Mainieri, V.
-
Paolillo, M.
-
Ranalli, P.
-
Shemmer, O.
-
Trump, J.
-
Wang, J. X.
-
Xue, Y. Q.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- Articles in the publication
-
Monthly Notices ...
- By the university
-
Lund University