A ROCKET-BORNE OBSERVATION OF THE FAR-INFRARED SKY AT HIGH GALACTIC LATITUDE

被引:21
作者
KAWADA, M
BOCK, JJ
HRISTOV, VV
LANGE, AE
MATSUHARA, H
MATSUMOTO, T
MATSUURA, S
MAUSKOPF, PD
RICHARDS, PL
TANAKA, M
机构
[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720
[2] UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720
关键词
DUST; EXTINCTION; INFRARED; GENERAL; ISM; CLOUDS;
D O I
10.1086/187317
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have measured the surface brightness of the far-infrared sky at lambda = 134, 154, and 186 mu m at high Galactic latitude using a liquid-He-cooled, rocket-borne telescope. The telescope scanned over a 5 degrees x 20 degrees region which includes infrared cirrus, high-latitude molecular clouds, the starburst galaxy M82, and the H I Hole in Ursa Major, a region with uniquely low H I column density. The measured brightness at 134, 154, and 186 mu m is well correlated with the 100 gamma m brightness measured by IRAS and, in regions excluding molecular clouds, with H I column density. The spectrum of the component correlated with H I is well fitted by a gray-body spectrum with a temperature of 16.4(+2.3/-1.8) K, assuming an emissivity proportional to lambda(-2). Assuming a constant far-infrared dust emissivity per hydrogen nucleus, the ratio of the H-2 column density to the velocity-integrated CO intensity in the high-latitude molecular cloud is N(H-2)/W-CO = (1.6+/-0.3) x 10(20) cm(-2) (K km s(-1))(-1). The residual brightness after subtracting the emission correlated with H I column density is lambda I-lambda(154 mu m) = (1.4+/-0.6) x 10(-12) W cm(-2) sr(-1), yielding an upper limit to the far-infrared extragalactic background radiation of lambda I-lambda(154 mu m) < 2.6 x 10(-12) W cm(-2) sr(-1).
引用
收藏
页码:L89 / L92
页数:4
相关论文
共 19 条
[1]   WHAT COBE MIGHT SEE - THE FAR-INFRARED COSMOLOGICAL BACKGROUND [J].
BEICHMAN, CA ;
HELOU, G .
ASTROPHYSICAL JOURNAL, 1991, 370 (01) :L1-L4
[2]  
BLOEMEN JBGM, 1986, ASTRON ASTROPHYS, V154, P25
[3]  
BOCK J, 1994, UNPUB APPL OPT
[4]   OBSERVATION OF [C-II] 158 MICRON EMISSION FROM THE DIFFUSE INTERSTELLAR-MEDIUM AT HIGH GALACTIC LATITUDE [J].
BOCK, JJ ;
HRISTOV, VV ;
KAWADA, M ;
MATSUHARA, H ;
MATSUMOTO, T ;
MATSUURA, S ;
MAUSKOPF, PD ;
RICHARDS, PL ;
TANAKA, M ;
LANGE, AE .
ASTROPHYSICAL JOURNAL, 1993, 410 (02) :L115-L118
[5]  
BOCK JJ, 1994, IN PRESS CRYOGENICS
[6]   DIFFUSE INFRARED-EMISSION FROM THE GALAXY .1. SOLAR NEIGHBORHOOD [J].
BOULANGER, F ;
PERAULT, M .
ASTROPHYSICAL JOURNAL, 1988, 330 (02) :964-985
[7]   MOLECULAR AND ATOMIC CLOUDS ASSOCIATED WITH INFRARED CIRRUS IN URSA MAJOR [J].
DEVRIES, HW ;
HEITHAUSEN, A ;
THADDEUS, P .
ASTROPHYSICAL JOURNAL, 1987, 319 (02) :723-729
[8]   H I IN THE GALAXY [J].
DICKEY, JM ;
LOCKMAN, FJ .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1990, 28 :215-261
[9]   ATOMIC OXYGEN EMISSION AT 63-MUM AS A COOLING MECHANISM IN THERMOSPHERE AND IONOSPHERE [J].
GROSSMANN, KU ;
OFFERMANN, D .
NATURE, 1978, 276 (5688) :594-595
[10]  
HAUSER MG, 1991, AIP C P, V222, P161