2007A&A...470...53A


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST11:57:01

2007A&A...470...53A - Astronomy and Astrophysics, volume 470, 53-60 (2007/7-4)

Dust and molecular content of the lensed quasar, MG 0751+2716, at z=3.2.

ALLOIN D., KNEIB J.-P., GUILLOTEAU S. and BREMER M.

Abstract (from CDS):

Gravitational lenses offer unique opportunities to explore the molecular content around active galactic nuclei at high redshift, through the magnification and gain in angular resolution. We study here the molecular and dust content of the high redshift (z=3.2), gravitationally lensed quasar MG0751+2716. We used the IRAM Plateau de Bure interferometer to measure the CO J=3-2, J=4-3 and J=8-7 rotation lines and continuum flux between 1.1mm and 3mm in MG0751+2716. We use HST data and constraints from the high resolution MERLIN map at 6.2 cm to build an improved model of the lens. The position agreement between the CO emission and the millimeter continuum suggests that dust and molecules are closely related. A 500 km/s velocity gradient is tentatively detected from the CO lines across the central 0.5''. The continuum SED in the range 0.45mm-204mm exhibits the signatures of two components: synchrotron emission from a core/jet system, and thermal emission related to warm dust. The CO line intensities are compatible with warm, dense molecular gas, suggesting a location in the close environment of the quasar. These observational constraints lead us to consider a source/quasar model made of a point-like core, a radio jet, and a molecular and dusty ring-like structure (∼460pc in radius) located in a plane perpendicular to the jet axis and seen almost edge-on. For this configuration, we derive a total magnification of 16 for the quasar radiation at rest frequency above 350 GHz and a magnification of 25 below 350 GHz. The dust mass (assuming a likely temperature T=50K) is Mdust=1.7x108M, the mass of molecular material is M(H2)=6x1010M and a lower limit to the dynamical mass is Mdyn=1.5x1010M. Such values are comparable to those found in the small sample of CO detected sources at high redshifts.

Abstract Copyright:

Journal keyword(s): gravitational lensing - quasars: individual: MG0751+2716 - cosmology: observations - quasars: general - radio lines: galaxies

Simbad objects: 33

goto Full paper

goto View the reference in ADS

Number of rows : 33

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 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2931 2
2 ICRF J074110.7+311200 Sy1 07 41 10.7033434 +31 12 00.231016   17.02 16.89 16.322   ~ 410 1
3 [LBC97] G4 G 07 51 40.99 +27 16 25.5           ~ 3 0
4 [LBC97] G1 G 07 51 41.07 +27 16 32.8           ~ 8 1
5 [LBC97] G2 G 07 51 41.33 +27 16 29.0           ~ 3 0
6 [LBC97] MITG J0751+2716 A4 Rad 07 51 41.469 +27 16 31.74           ~ 2 0
7 [LBC97] MITG J0751+2716 C4 Rad 07 51 41.475 +27 16 31.80           ~ 2 0
8 [LBC97] MITG J0751+2716 A3 Rad 07 51 41.476 +27 16 31.69           ~ 2 0
9 [LBC97] MITG J0751+2716 C3 Rad 07 51 41.483 +27 16 31.86           ~ 2 0
10 [LBC97] MITG J0751+2716 A2 Rad 07 51 41.499 +27 16 31.60           ~ 2 0
11 QSO J0751+2716 QSO 07 51 41.517 +27 16 31.79     18.7     ~ 69 2
12 [LBC97] G3 G 07 51 41.52 +27 16 31.7           ~ 6 1
13 [LBC97] MITG J0751+2716 A1 Rad 07 51 41.54 +27 16 31.6           ~ 2 0
14 [LBC97] MITG J0751+2716 C2 Rad 07 51 41.558 +27 16 32.01           ~ 2 0
15 [LBC97] MITG J0751+2716 B6 Rad 07 51 41.603 +27 16 31.25           ~ 2 0
16 [LBC97] MITG J0751+2716 C1 Rad 07 51 41.618 +27 16 32.07           ~ 2 0
17 [LBC97] MITG J0751+2716 B5 Rad 07 51 41.813 +27 16 31.26           ~ 2 0
18 [LBC97] G5 G 07 51 41.85 +27 16 28.9           ~ 3 0
19 [LBC97] MITG J0751+2716 B3 Rad 07 51 41.850 +27 16 31.26           ~ 2 0
20 [LBC97] MITG J0751+2716 B2 Rad 07 51 41.940 +27 16 31.37           ~ 2 0
21 [LBC97] MITG J0751+2716 B1 Rad 07 51 42.030 +27 16 31.29           ~ 2 0
22 [LBC97] MITG J0751+2716 D1 Rad 07 51 42.172 +27 16 31.90           ~ 2 0
23 7C 082754.29+242103.00 QSO 08 30 52.08619070 +24 10 59.8204032   17.62 17.26 16.30   ~ 465 1
24 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5336 6
25 7C 095757.60+560823.00 QSO 10 01 20.6915852239 +55 53 55.595776916   17.16 16.95     ~ 697 3
26 SDSS J114816.64+525150.3 QSO 11 48 16.647 +52 51 50.31   25.73 25.04     ~ 391 0
27 QSO B1202-074 QSO 12 05 23.12 -07 42 32.4     17.5     ~ 349 5
28 QSO J1415+1129 QSO 14 15 46.25 +11 29 43.4   17.63 17.23     ~ 595 1
29 NAME SMM J16359+66118 GiC 16 35 54.8 +66 11 52           ~ 23 2
30 SDSS J164501.07+462615.4 QSO 16 45 01.0722128835 +46 26 15.471165011           ~ 137 0
31 [LBC97] MITG J0751+2716 A LeI ~ ~           ~ 2 0
32 [LBC97] MITG J0751+2716 D LeI ~ ~           ~ 2 0
33 [LBC97] MITG J0751+2716 B LeI ~ ~           ~ 2 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2007A&A...470...53A and select 'bookmark this link' or equivalent in the popup menu


2020.07.12-11:57:01

© Université de Strasbourg/CNRS

    • Contact