2005ApJ...634L..13W


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.19CET20:15:06

2005ApJ...634L..13W - Astrophys. J., 634, L13-L16 (2005/November-3)

HCN J = 5-4 emission in APM 08279+5255 at z = 3.91.

WAGG J., WILNER D.J., NERI R., DOWNES D. and WIKLIND T.

Abstract (from CDS):

We detect HCN J=5-4 emission from the ultraluminous quasar APM 08279+5255 at z=3.911 using the IRAM Plateau de Bure Interferometer. This object is strongly gravitationally lensed, yet still thought to be one of the most intrinsically luminous objects in the universe. The new data imply a line luminosity L'HCN(J=5–4)=(4.0±0.5)x1010 K km/s pc2. The ∼440 km/s FWHM of the HCN J=5-4 line matches that of the previously observed high-J CO lines in this object and suggests that the emission from both species emerges from the same region: a warm, dense circumnuclear disk. Simple radiative transfer models suggest an enhanced abundance of HCN relative to CO in the nuclear region of APM 08279+5255, perhaps due to increased ionization, or possibly the selective depletion of oxygen. The ratio of far-infrared luminosity to HCN luminosity is at the high end of the range found for nearby star-forming galaxies, but is comparable to that observed in the few high-redshift objects detected in the HCN J=1-0 line. This is the first clear detection of high-J HCN emission redshifted into the 3 mm atmospheric window.:

Abstract Copyright:

Journal keyword(s): Galaxies: Active - Galaxies: High-Redshift - Galaxies: ISM - Galaxies: Quasars: Emission Lines - Galaxies: Quasars: Individual: Alphanumeric: APM 08279+5255

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4016 2
2 RAFGL 618 pA* 04 42 53.6245215366 +36 06 53.397219192   16.32   12.59   C-rich 944 0
3 4C 54.15 BLL 07 53 01.38456785 +53 52 59.6370745   18.5   16.77   ~ 126 1
4 QSO J0831+5245 QSO 08 31 41.7095363198 +52 45 17.620340544   19.2   14.5 13.9 ~ 475 1
5 ICRF J092703.0+390220 Sy1 09 27 03.0139516273 +39 02 20.847968628   17.17 17.00 16.486   ~ 922 1
6 [VV96] J102434.5+470911 Sy1 10 24 34.5 +47 09 11     20.5     ~ 474 0
7 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1747 3
8 QSO B1408+5642 QSO 14 09 55.5654159383 +56 28 26.429306318   17.56 17.30     ~ 45 0
9 QSO J1415+1129 QSO 14 15 46.25 +11 29 43.4   17.63 17.23     ~ 583 1
10 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 695 0

    Equat.    Gal    SGal    Ecl

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2020.01.19-20:15:06

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