scholarly journals Near‐Infrared Spectroscopy of High‐Redshift Active Galactic Nuclei. I. A Metallicity–Accretion Rate Relationship

2004 ◽  
Vol 614 (2) ◽  
pp. 547-557 ◽  
Author(s):  
O. Shemmer ◽  
H. Netzer ◽  
R. Maiolino ◽  
E. Oliva ◽  
S. Croom ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Active Galactic Nuclei ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Accretion Rate ◽  
High Redshift ◽  
Galactic Nuclei ◽  
Rate Relationship

scholarly journals AKARI Infrared Views of AGNs

2009 ◽  
Vol 5 (S267) ◽  
pp. 129-129
Author(s):  
Shinki Oyabu
Keyword(s):  
Infrared Spectroscopy ◽  
Active Galactic Nuclei ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Galactic Nuclei ◽  
Far Infrared ◽  
Sky Survey

AbstractThe Japanese infrared satellite AKARI has unique capabilities for near-infrared spectroscopy and an all-sky survey in the mid- and far-infrared. We present the recent results on active galactic nuclei that use the unique capabilities of AKARI.

Near-Infrared Spectroscopy of the High-Redshift Quasar S4 0636+68 at [CLC][ITAL]z[/ITAL][/CLC] = 3.2

1998 ◽  
Vol 115 (6) ◽  
pp. 2237-2243 ◽  
Author(s):  
Takashi Murayama ◽  
Yoshiaki Taniguchi ◽  
Aaron S. Evans ◽  
D. B. Sanders ◽  
Youichi Ohyama ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
High Redshift

scholarly journals Star formation in accretion discs and SMBH growth

2020 ◽  
Vol 493 (3) ◽  
pp. 3732-3743 ◽  
Author(s):  
Alexander J Dittmann ◽  
M Coleman Miller
Keyword(s):  
Black Holes ◽  
Star Formation ◽  
Active Galactic Nuclei ◽  
Accretion Rate ◽  
High Redshift ◽  
Galactic Nuclei ◽  
Compact Objects ◽  
Accretion Discs ◽  
Massive Black Holes ◽  
Gas Accretion

ABSTRACT Accretion discs around active galactic nuclei (AGNs) are potentially unstable to star formation at large radii. We note that when the compact objects formed from some of these stars spiral into the central supermassive black hole (SMBH), there is no radiative feedback and therefore the accretion rate is not limited by radiation forces. Using a set of accretion disc models, we calculate the accretion rate on to the central SMBH in both gas and compact objects. We find that the time-scale for an SMBH to double in mass can decrease by factors ranging from ∼0.7 to as low as ∼0.1 in extreme cases, compared to gas accretion alone. Our results suggest that the formation of extremely massive black holes at high redshift may occur without prolonged super-Eddington gas accretion or very massive seed black holes. We comment on potential observational signatures as well as implications for other observations of AGNs.

New Near-Infrared Spectroscopy of the High-Redshift Quasar B1422+231 at [CLC][ITAL]z[/ITAL][/CLC] = 3.62

1999 ◽  
Vol 117 (4) ◽  
pp. 1645-1650 ◽  
Author(s):  
Takashi Murayama ◽  
Yoshiaki Taniguchi ◽  
Aaron S. Evans ◽  
D. B. Sanders ◽  
K.-W. Hodapp ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
High Redshift

scholarly journals Optical and Near-Infrared Spectroscopy of a High-Redshift Hard X-Ray–emitting Spiral Galaxy

2003 ◽  
Vol 125 (3) ◽  
pp. 1236-1246 ◽  
Author(s):  
Steve Dawson ◽  
Nate McCrady ◽  
Daniel Stern ◽  
Megan E. Eckart ◽  
Hyron Spinrad ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Spiral Galaxy ◽  
Near Infrared ◽  
High Redshift ◽  
X Ray

scholarly journals A WIDE AREA SURVEY FOR HIGH-REDSHIFT MASSIVE GALAXIES. II. NEAR-INFRARED SPECTROSCOPY OFBzK-SELECTED MASSIVE STAR-FORMING GALAXIES

2010 ◽  
Vol 715 (1) ◽  
pp. 385-405 ◽  
Author(s):  
Masato Onodera ◽  
Nobuo Arimoto ◽  
Emanuele Daddi ◽  
Alvio Renzini ◽  
Xu Kong ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Massive Star ◽  
Near Infrared ◽  
High Redshift ◽  
Wide Area ◽  
Massive Galaxies ◽  
Star Forming ◽  
Area Survey
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