2007ApJ...662..284Y

Query : 2007ApJ...662..284Y

2007ApJ...662..284Y - Astrophys. J., 662, 284-293 (2007/June-2)

350 µm observations of local luminous infrared galaxies and the temperature dependence of the emissivity index.

YANG M. and PHILLIPS T.

Abstract (from CDS):

We report 350 µm observations of 18 nearby luminous infrared galaxies (LIRGs) using the Submillimeter High Angular Resolution Camera II (SHARC-II) mounted on the Caltech Submillimeter Observatory (CSO) 10.4 m telescope. Combining our 350 µm flux measurements with the existing far-infrared (FIR) and submillimeter data, we fit a single-temperature model to the spectral energy distributions (SEDs) and find the dust temperatures, emissivity indices, and FIR luminosities having sample medians of Td=39.4±7.9 K, β=1.6±0.3, and LFIR=1011.2±0.6 L☉. An empirical inverse Td-β correlation, best described by Td=9.86x1091/4.63+β, is established for the local LIRG sample, which we argue can be explained by the intrinsic interdependence between the dust temperature and grain emissivity index as physical parameters, as well as variations in grain properties in the interstellar medium (ISM).

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Journal keyword(s): ISM: Dust, Extinction - Infrared: Galaxies - Submillimeter

Simbad objects: 18

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Number of rows : 18
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 520 AGN 01 24 35.07120 +03 47 32.6760 12.41 12.24 11.42     ~ 528 3
2 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 697 1
3 NGC 2339 H2G 07 08 20.5343958360 +18 46 48.812128644   12.3       ~ 150 1
4 NGC 2388 AGN 07 28 53.4535009080 +33 49 08.554343196   14.7       ~ 145 2
5 NGC 2623 LIN 08 38 24.016 +25 45 16.29 14.10 13.99 13.36     ~ 533 2
6 Z 289-11 Sy2 09 35 51.6045544584 +61 21 11.589382368   15.20 15.50     ~ 617 2
7 NGC 4102 Sy2 12 06 23.11513 +52 42 39.4160   11.8       ~ 449 1
8 NGC 4194 rG 12 14 09.615 +54 31 35.93   13.79 13.30     ~ 467 2
9 NGC 4355 Sy2 12 26 54.6206739120 -00 52 39.421212996   14.21 13.37     ~ 527 2
10 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
11 NGC 4818 Sy2 12 56 48.907 -08 31 31.08   11   10.88   ~ 160 1
12 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 500 1
13 Z 271-60 Sy2 13 44 42.1883001099 +55 53 13.596220922   15.68 14.91     ~ 958 3
14 NGC 6000 Sy2 15 49 49.556 -29 23 12.50   13.02   11.27 12.0 ~ 116 1
15 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
16 NGC 7130 Sy2 21 48 19.5412287192 -34 57 04.492024884   12.86 13.87 11.57   ~ 483 1
17 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2253 3
18 Z 455-59 AGN 23 51 26.731 +20 35 10.22   14.9       ~ 237 0

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