New 8-13 μm spectroscopy of luminous and ultraluminous infrared galaxies

被引:42
作者
Dudley, CC [1 ]
机构
[1] Univ Hawaii, Astron Inst, Honolulu, HI 96822 USA
关键词
dust; extinction; galaxies : active; galaxies : starburst; infrared : galaxies;
D O I
10.1046/j.1365-8711.1999.02631.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
New moderate-resolution mid-infrared spectroscopy at 10 mu m of 27 infrared galaxies is presented. The galaxies have been chosen from three 60-mu m selected and one 12-mu m selected complete flux-limited catalogues of galaxies; 17 of these sources have L(IR)(8-1000 mu m) greater than or equal to 5 x 10(11) L(.). A high-resolution spectrum of the source Arp 299B1 is also presented. Combining these new results with previously published results, a nearly complete 60-mu m selected flux-limited subsample, with L(IR)(8-1000 mu m) greater than or equal to 1.6 x 10(11) L(.), of 25 galaxies is defined, Within this subsample, it is found that the dominant power sourer of infrared galaxies in the luminosity range 1.6 x 10(11) < L(IR)(8-1000 mu m) < 10(12) L(.) is massive star formation based on the clear presence of the 11.3-mu m aromatic hydrocarbon emission feature in the majority of the spectra. Three of the five ultraluminous infrared galaxies [L(IR)(8-1000 mu m) greater than or equal to 10(12) L(.)] within this subsample show evidence that an active galactic nucleus provides an energetically important power source based on the detection of silicate absorption in their mid-infrared spectra, The physical basis of a possible anticorrelation between the 11.3-mu m feature equivalent width and infrared light to molecular gas mass ratios is discussed.
引用
收藏
页码:553 / 576
页数:24
相关论文
共 75 条
[1]   SPECTROPOLARIMETRY AND THE NATURE OF NGC-1068 [J].
ANTONUCCI, RRJ ;
MILLER, JS .
ASTROPHYSICAL JOURNAL, 1985, 297 (02) :621-632
[2]   LONG-SLIT OPTICAL SPECTROSCOPY OF POWERFUL FAR-INFRARED GALAXIES - THE NATURE OF THE NUCLEAR-ENERGY SOURCE [J].
ARMUS, L ;
HECKMAN, TM ;
MILEY, GK .
ASTROPHYSICAL JOURNAL, 1989, 347 (02) :727-742
[3]   DISCOVERY OF AN INFRARED-LOUD QUASAR [J].
BEICHMAN, CA ;
SOIFER, BT ;
HELOU, G ;
CHESTER, TJ ;
NEUGEBAUER, G ;
GILLETT, FC ;
LOW, FJ .
ASTROPHYSICAL JOURNAL, 1986, 308 (01) :L1-L5
[4]  
Bevington R., 1969, DATA REDUCTION ERROR
[5]   OPTICAL POSITIONS OF SEYFERT-GALAXIES [J].
CLEMENTS, ED .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1981, 197 (03) :829-834
[6]   SPECTRAL IRRADIANCE CALIBRATION IN THE INFRARED .4. 1.2-35 MU-M SPECTRA OF 6 STANDARD STARS [J].
COHEN, M ;
WITTEBORN, FC ;
WALKER, RG ;
BREGMAN, JD ;
WOODEN, DH .
ASTRONOMICAL JOURNAL, 1995, 110 (01) :275-289
[7]   THE INFRARED-EMISSION BANDS .3. SOUTHERN IRAS SOURCES [J].
COHEN, M ;
TIELENS, AGGM ;
BREGMAN, J ;
WITTEBORN, FC ;
RANK, DM ;
ALLAMANDOLA, LJ ;
WOODEN, DH ;
DEMUIZON, M .
ASTROPHYSICAL JOURNAL, 1989, 341 (01) :246-269
[8]   SPECTRAL IRRADIANCE CALIBRATION IN THE INFRARED .5. THE ROLE OF UKIRT AND THE CGS3 SPECTROMETER [J].
COHEN, M ;
DAVIES, JK .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1995, 276 (03) :715-722
[9]   UGC GALAXIES STRONGER THAN 25 MJY AT 4.85 GHZ [J].
CONDON, JJ ;
FRAYER, DT ;
BRODERICK, JJ .
ASTRONOMICAL JOURNAL, 1991, 101 (02) :362-&
[10]   A 1.425 GHz atlas of the IRAS bright galaxy sample .2. [J].
Condon, JJ ;
Helou, G ;
Sanders, DB ;
Soifer, BT .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1996, 103 (01) :81-108