J/MNRAS/453/2050 Cold galaxies (Rowan-Robinson+, 2015)
Cold galaxies.
Rowan-Robinson M., Clements D.L.
<Mon. Not. R. Astron. Soc., 453, 2050-2057 (2015)>
=2015MNRAS.453.2050R 2015MNRAS.453.2050R (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, IR ; Interstellar medium ; Redshifts
Keywords: stars: formation - galaxies: evolution - galaxies: starburst -
cosmology: observations - infrared: galaxies
Abstract:
We use 350 µm angular diameter estimates from Planck to test the idea
that some galaxies contain exceptionally cold (10-13 K) dust, since colder
dust implies a lower surface brightness radiation field illuminating the
dust, and hence a greater physical extent for a given luminosity. The
galaxies identified from their spectral energy distributions as containing
cold dust do indeed show the expected larger 350 µm diameters. For
a few cold dust galaxies where Herschel data are available, we are able to
use submillimetre maps or surface brightness profiles to locate the
cold dust, which as expected generally lies outside the optical galaxy.
Description:
We have focused on those galaxies for which the predicted sub-mm diameter
is greater than 3 arcmin and compared these with the PCCS sub-mm diameters
(FWHM) observed by Planck at 350 µm. We use the Gaussian half-power
width measured along the major axis. Table 2 summarizes the properties
of galaxies from the IRAS RIFSCz catalogue with predicted sub-mm diameter
greater than 3 arcmin, spectroscopic redshifts, at least eight optical
photometric bands, x2 for the infrared template fit <5 and SEDs dominated
either by a cirrus or cool dust template.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 76 33 Galaxies requiring cold dust components
table2.dat 76 117 Comparison samples of large galaxies requiring
cool dust or normal cirrus components
--------------------------------------------------------------------------------
See also:
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
J/ApJS/141/157 : CO (J=1-0) data of cold IRAS sources (Yang+, 2002)
Byte-by-byte Description of file: table1.dat table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- Group [abcd] Group (1)
3- 14 A12 --- IRAS IRAS name (FHHMMm+DDMM)
16- 23 F8.6 --- z [0.00044/0.05828] Redshift
25- 29 F5.2 Lsun Lopt [7.5/12.01] Optical luminosity
31- 36 F6.3 [arcsec] logt(pred) [-0.54/1.296] Log predicted angular size
log10θpred
38- 42 F5.2 arcsec theta [4.9/25.21]? Angular size θPlanck
44- 48 F5.2 [arcsec] logt(opt) [-0.41/1.34]? Log optical angular size
log10θopt
50- 52 I3 --- ncirr [1/223]? Cirrus components
54- 76 A23 --- OName Other galaxy name
--------------------------------------------------------------------------------
Note (1): Group as follows:
a = Planck selected galaxy;
b = RIFSCz selected galaxy;
c = Cool dust galaxy;
d = Cirrus galaxy.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 05-Dec-2019