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The deepest X-ray v...
The deepest X-ray view of high-redshift galaxies : Constraints on low-rate black hole accretion
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- Vito, F. (författare)
- INAF Osservatorio Astronomico di Bologna,Pennsylvania State University,University of Bologna
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- Gilli, R. (författare)
- INAF Osservatorio Astronomico di Bologna
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- Vignali, C. (författare)
- University of Bologna,INAF Osservatorio Astronomico di Bologna
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- Brandt, W. N. (författare)
- Pennsylvania State University
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- Comastri, A. (författare)
- INAF Osservatorio Astronomico di Bologna
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- Yang, G. (författare)
- Pennsylvania State University
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- Lehmer, B. D. (författare)
- University of Arkansas - Fayetteville
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- Luo, B. (författare)
- Nanjing University
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- Basu-Zych, A. (författare)
- NASA Goddard Space Flight Center,University of Maryland, Baltimore
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- Bauer, F. E. (författare)
- Millennium Institute for Astrophysics,Pontifical Catholic University of Chile,Space Science Institute
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- Cappelluti, N. (författare)
- Yale University
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- Koekemoer, A. (författare)
- Space Telescope Science Institute
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- Mainieri, V. (författare)
- European Southern Observatory
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- Paolillo, M. (författare)
- Istituto Nazionale di Fisica Nucleare, Sezione di Napoli,University of Naples Federico II,Italian Space Agency
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- Ranalli, P. (författare)
- 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
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Shemmer, O. (författare)
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- Trump, J. (författare)
- Pennsylvania State University
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- Wang, J. X. (författare)
- Shanghai Astronomical Observatory, Chinese Academy of Sciences
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- Xue, Y. Q. (författare)
- Shanghai Astronomical Observatory, Chinese Academy of Sciences
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(creator_code:org_t)
- 2016-08-10
- 2016
- Engelska 27 s.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 463:1, s. 348-374
- Relaterad länk:
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http://dx.doi.org/10...
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http://arxiv.org/pdf...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Galaxies: active
- Galaxies: evolution
- Galaxies: high
- methods: data analysis
- Redshift
- Surveys
- X-rays: galaxies
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Vito, F.
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Gilli, R.
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Vignali, C.
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Brandt, W. N.
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Comastri, A.
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Yang, G.
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visa fler...
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Lehmer, B. D.
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Luo, B.
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Basu-Zych, A.
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Bauer, F. E.
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Cappelluti, N.
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Koekemoer, A.
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Mainieri, V.
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Paolillo, M.
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Ranalli, P.
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Shemmer, O.
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Trump, J.
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Wang, J. X.
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Xue, Y. Q.
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