2010ApJ...724L..59H

Query : 2010ApJ...724L..59H

2010ApJ...724L..59H - Astrophys. J., 724, L59-L63 (2010/November-3)

Hot-dust-poor type 1 active galactic nuclei in the COSMOS survey.

HAO H., ELVIS M., CIVANO F., LANZUISI G., BRUSA M., LUSSO E., ZAMORANI G., COMASTRI A., BONGIORNO A., IMPEY C.D., KOEKEMOER A.M., LE FLOC'H E., SALVATO M., SANDERS D., TRUMP J.R. and VIGNALI C.

Abstract (from CDS):

We report a sizable class of type 1 active galactic nuclei (AGNs) with unusually weak near-infrared (1-3 µm) emission in the XMM-COSMOS type 1 AGN sample. The fraction of these "hot-dust-poor" AGNs increases with redshift from 6% at low redshift (z < 2) to 20% at moderate high redshift (2 < z < 3.5). There is no clear trend of the fraction with other parameters: bolometric luminosity, Eddington ratio, black hole mass, and X-ray luminosity. The 3 µm emission relative to the 1 µm emission is a factor of 2-4 smaller than the typical Elvis et al. AGN spectral energy distribution (SED), which indicates a "torus" covering factor of 2%-29%, a factor of 3-40 smaller than required by unified models. The weak hot dust emission seems to expose an extension of the accretion disk continuum in some of the source SEDs. We estimate the outer edge of their accretion disks to lie at (0.3-2.0)x10⁴ Schwarzschild radii, ∼10-23 times the gravitational stability radii. Formation scenarios for these sources are discussed.

Abstract Copyright: ∼

Journal keyword(s): galaxies: evolution - quasars: general

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	NGC 6090	PaG	16 11 40.3	+52 27 21		14.0				~	446	1

Query : 2010ApJ...724L..59H

Basic data :

NGC 6090 -- Pair of Galaxies

PaG (), G (2013PASJ,CGPG,...), GiP (KPG,[T76]), IR (IRAS,PSCz), SBG (2013MNRAS), EmG (ELARS), IG (VV)

16 11 40.3 +52 27 21 (Optical) [ ] D 2003A&A...412...45P

16 10 24.0 +52 35 00 [ ]

081.3881 +45.2125 [ ]

V(km/s) 8735 [~] / z(emission) 0.029573 [~] / cz 8865.76 [~] (IR) C 2016ApJS..226...11S

Sd D ~

0.794733 0.623309 78 (Opt) B 2023ApJS..269....3M

B 14.0 [~] E ~

g (AB) 14.7247 [0.0190] C 2023ApJS..269....3M

r (AB) 14.0230 [0.0169] C 2023ApJS..269....3M

z (AB) 13.6574 [0.0237] C 2023ApJS..269....3M

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`NGC 6090`	`KPG 486`	`UGC 10267`	`Z 1610.4+5235`
`CGPG 1610.4+5235`	`LEDA 57437`	`UZC J161140.7+522725`	`[CCA99] UGC 10267a`
`ELARS 01`	`MCG+09-26-064`	`VV 626`	`[T76] 135`
`IRAS F16104+5235`	`Mrk 496`	`ZW I 135`	`[T76] 135A`
`IRAS 16104+5235`	`PSCz Q16104+5235`	`Z 275-29`	`[WZX98] 16104+5235`
`KPG 486a`	`SBSG 1610+525`	`Z 276-2`

References (446 between 1850 and 2026) (Total 446)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Data at NED - NASA/IPAC Extragalactic Database : NGC 6090

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`NGC 6090`	`IRAS F16104+5235`	`IRAS 16104+5235`	`KPG 486a`	`KPG 486`
`UGC 10267`

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