TY - JOUR
T1 - Spectral signature of cosmological infall of gas around the first quasars
AU - Barkana, Rennan
AU - Loeb, Abraham
N1 - Funding Information:
Acknowledgements We thank E. Turner and H. Netzer for discussions, and are grateful for the hospitality of the Institute for Advanced Study where this work was completed. R.B. acknowledges the support of an Alon Fellowship at Tel Aviv University and of the Israel Science Foundation. A.L. acknowledges support from the Institute for Advanced Study and a John Simon Guggenheim Memorial Fellowship. This work was also supported by the National Science Foundation.
PY - 2003/1/23
Y1 - 2003/1/23
N2 - Recent observations have shown that, only a billion years after the Big Bang, the Universe was already lit up by bright quasars fuelled by the infall of gas onto supermassive black holes. The masses of these early black holes are inferred from their luminosities to be >109 solar masses (M⊙), which is a difficult theoretical challenge to explain. Like nearby quasars, the early objects could have formed in the central cores of massive host galaxies. The formation of these hosts could be explained if, like local large galaxies, they were assembled gravitationally inside massive (>1012 M⊙) haloes of dark matter. There has hitherto been no observational evidence for the presence of these massive hosts or their surrounding haloes. Here we show that the cosmic gas surrounding each halo must respond to its strong gravitational pull, where absorption by the infalling hydrogen produces a distinct spectral signature. That signature can be seen in recent data.
AB - Recent observations have shown that, only a billion years after the Big Bang, the Universe was already lit up by bright quasars fuelled by the infall of gas onto supermassive black holes. The masses of these early black holes are inferred from their luminosities to be >109 solar masses (M⊙), which is a difficult theoretical challenge to explain. Like nearby quasars, the early objects could have formed in the central cores of massive host galaxies. The formation of these hosts could be explained if, like local large galaxies, they were assembled gravitationally inside massive (>1012 M⊙) haloes of dark matter. There has hitherto been no observational evidence for the presence of these massive hosts or their surrounding haloes. Here we show that the cosmic gas surrounding each halo must respond to its strong gravitational pull, where absorption by the infalling hydrogen produces a distinct spectral signature. That signature can be seen in recent data.
UR - http://www.scopus.com/inward/record.url?scp=0037461734&partnerID=8YFLogxK
U2 - 10.1038/nature01330
DO - 10.1038/nature01330
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:0037461734
VL - 421
SP - 341
EP - 343
JO - Nature
JF - Nature
SN - 0028-0836
IS - 6921
ER -