LUMINOUS INFRARED GALAXIES - SIZES AT 10-32 MICRONS

被引:44
作者
WYNNWILLIAMS, CG
BECKLIN, EE
机构
[1] Institute for Astronomy, University of Hawaii, Honolulu, HI 96822
[2] Department of Astronomy, University of California, Los Angeles
关键词
GALAXIES; NUCLEI; PHOTOMETRY; INFRARED;
D O I
10.1086/172941
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have made estimates of the sizes of 19 infrared galaxies drawn from the highest luminosity galaxies detected by the IRAS survey. The techniques we used were to make multiaperture photometric measurements on the IRTF and to compare these flux densities with the much broader beam measurements obtained by the IRAS survey. Our primary result is that most, but not all, of the galaxies in our sample are extended at 10-25 mum, with characteristic radii of a few hundred parsecs. This result directly supports the widely held assumption that the bulk of the infrared luminosity in these galaxies comes from a central starburst region rather than from the whole disk of the galaxy or from a compact nucleus. The compact nature of Arp 220 is confirmed by direct scans with a 2''9 aperture at 32 mum.
引用
收藏
页码:535 / 540
页数:6
相关论文
共 29 条
[1]  
[Anonymous], 1988, IRAS POINT SOURCE CA
[2]  
BECKLIN EE, 1986, NASA CP2466, P643
[3]  
Beichman C.A., 1988, IRAS CATALOGS ATLASE
[4]   15 GHZ COMPACT STRUCTURE IN GALACTIC NUCLEI [J].
CARRAL, P ;
TURNER, JL ;
HO, PTP .
ASTROPHYSICAL JOURNAL, 1990, 362 (02) :434-442
[5]   A 1.49 GHZ ATLAS OF THE IRAS BRIGHT GALAXY SAMPLE [J].
CONDON, JJ ;
HELOU, G ;
SANDERS, DB ;
SOIFER, BT .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1990, 73 (03) :359-400
[6]   IRAS 17138-1017 - A HIGHLY OBSCURED LUMINOUS STARBURST GALAXY [J].
DEPOY, DL ;
WYNNWILLIAMS, CG ;
HILL, GJ ;
BECKLIN, EE .
ASTRONOMICAL JOURNAL, 1988, 95 (02) :398-407
[7]  
DEPOY DL, 1993, UNPUB
[8]  
DEVAUCOULEURS G, 1976, 2ND REFERENCE CATALO
[9]  
DEVAUCOULEURS G, 1991, 3RD REFERENCE CATALO
[10]   THE RADIO PROPERTIES OF GALAXIES WITH HIGH FAR-INFRARED LUMINOSITIES [J].
EALES, SA ;
WYNNWILLIAMS, CG ;
BEICHMAN, CA .
ASTROPHYSICAL JOURNAL, 1988, 328 (02) :530-551