2000A&A...354..453H

Query : 2000A&A...354..453H

2000A&A...354..453H - Astronomy and Astrophysics, volume 354453-466 (2000/2-2)

Dust in PG quasars as seen by ISO.

HAAS M., MUELLER S.A.H., CHINI R., MEISENHEIMER K., KLAAS U., LEMKE D., KREYSA E. and CAMENZIND M.

Abstract (from CDS):

Infrared to millimeter spectral energy distributions (SEDs) have been obtained for a random sample of 17 Palomar Green quasars. The observations were carried out between 4.8and 200µm with ISO and supplemented for ten sources with IRAM at 1.3mm. Eight sources were detected in the far infrared for the first time. The SEDs provide evidence for considerable dust emission and do not support the existence of dust-free, naked quasars. The SEDs resemble those of warm ultraluminous infrared galaxies (ULIRGs). The SEDs show a variety of shapes (power-law, mid-infrared dominated, and far-infrared dominated), suggesting the influence of different heating mechanisms. The mid- and far-infrared luminosities are correlated, suggesting a dependence between the heating mechanisms. The role of AGNs and starbursts for the dust heating is discussed, as well as the link between general ULIRGs and dust-enshrouded quasars.

Abstract Copyright: ∼

Journal keyword(s): galaxies: fundamental parameters - galaxies: photometry - galaxies: quasars: general - infrared: galaxies

Simbad objects: 20

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Number of rows : 20
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 ICRF J000559.2+160949 Sy1 00 05 59.2378545384 +16 09 49.021968096   16.51 16.40     ~ 307 1
2 LEDA 1790 Sy1 00 29 13.7012449608 +13 16 03.947778264   15.70 15.41     ~ 474 0
3 2MASS J00454722+0410233 Sy1 00 45 47.2231233240 +04 10 23.386759392   15.88 16.00     ~ 163 0
4 87GB 004432.0+030343 Sy1 00 47 05.9186531064 +03 19 54.784830324   16.2 16.37     ~ 154 2
5 Mrk 1502 Sy1 00 53 34.9331107632 +12 41 35.929269132   14.41 14.03     ~ 1242 1
6 LEDA 3237 Sy1 00 54 52.1183662680 +25 25 38.983241532     15.42     ~ 421 0
7 QSO J1208+4540 QSO 12 08 58.0107013896 +45 40 35.421692952   16.00 15.70     ~ 194 0
8 QSO J1244+1721B QSO 12 44 10.8247089768 +17 21 04.508869464   16.40 16.09     ~ 159 1
9 LB 19 QSO 12 50 05.7146863848 +26 31 07.598352000   16.12 15.92     ~ 207 0
10 QSO B1254+0443 QSO 12 56 59.9234909976 +04 27 34.411850136   16.53 16.25     ~ 160 0
11 LB 2522 Sy1 13 01 12.9250750776 +59 02 06.693816732   16.04 15.89     ~ 298 0
12 QSO J1305-1033 Bla 13 05 33.0150535680 -10 33 19.430383680   15.18 15.23 14.46   ~ 624 1
13 LEDA 45656 Sy1 13 09 47.0031619008 +08 19 48.212362524   16.04 15.89     ~ 412 0
14 LEDA 50824 Sy1 14 13 48.3306274368 +44 00 14.003371296   14.99 14.99     ~ 402 0
15 2MASX J15265942+3558372 LIN 15 26 59.44451 +35 58 37.0521   15.61       ~ 295 1
16 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
17 Mrk 876 Sy1 16 13 57.1795021224 +65 43 09.952685328   16.03 15.49     ~ 620 0
18 QSO B1634+7037 QSO 16 34 28.9917184368 +70 31 32.393436960   14.90 14.66     ~ 273 0
19 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
20 2MASS J21145258+0607423 Sy1 21 14 52.5774985320 +06 07 42.433198104   16.06 15.77     ~ 227 0

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