Space-VLBI observations of the OH maser OH 34.26+0.15: low interstellar scattering

被引：17

作者：

Slysh, VI

Voronkov, MA

Migenes, V

Shibata, KM

Umemoto, T

Altunin, VI

Val'tts, IE

Kanevsky, BZ

Popov, MV

Kovalenko, AV

Fomalont, EB

Poperechenko, BA

Gorshenkov, YN

Carlson, BR

Dougherty, SM

Reynolds, JE

Jiang, DR

Smirnov, AI

Grachev, VG

机构：

[1] PN Lebedev Phys Inst, Ctr Astro Space, Moscow 117810, Russia

[2] Univ Guanajuato, Dept Astron, Guanajuato 36000, Mexico

[3] Natl Astron Observ, Tokyo 181, Japan

[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[5] Natl Radio Astron Observ, Charlottesville, VA 22903 USA

[6] Moscow Power Engn Inst, Special Res Bur, Moscow 111250, Russia

[7] Natl Res Council Canada, Herzberg Inst Astrophys, Domin Radio Astrophys Observ, Penticton, BC V2A 6K3, Canada

[8] Australia Telescope Natl Facil, Epping, NSW 2121, Australia

[9] Shanghai Astron Observ, Shanghai 200080, Peoples R China

[10] Inst Appl Astron, St Petersburg 197042, Russia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2001年 / 320卷 / 02期

关键词：

masers; scattering; stars : formation; HII regions; ISM : molecules;

D O I：

10.1046/j.1365-8711.2001.03959.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the first space-VLBI observations of the OH 34.26+0.15 maser in two main-line OH transitions at 1665 and 1667 MHz. The observations involved the space radio telescope on board the Japanese satellite HALCA and an array of ground radio telescopes. The map of the maser region and images of individual maser spots were produced with an angular resolution of 1 mas, which is several times higher than the angular resolution available on the ground. The maser spots were only partly resolved and a lower limit to the brightness temperature 6 x 10(12) K was obtained. The maser seems to be located in the direction of low interstellar scattering, an order of magnitude lower than the scattering of a nearby extragalactic source and pulsar.

引用

页码：217 / 223

页数：7

共 6 条

[1] Space-VLBI observations of OH masers
Slysh, VI
Voronkov, MA
Val'tts, IE
Migenes, V
Shibata, KM
Umemoto, T
Inoue, M
[J]. COSMIC MASERS: FROM PROTOSTARS TO BLACKHOLES, 2002, (206): : 105 - 111
[2] A MECHANISM FOR MASER ACTION OF OH MOLECULES IN INTERSTELLAR SPACE
JOHNSTON, ID
[J]. ASTROPHYSICAL JOURNAL, 1967, 150 (1P1): : 33 - &
[3] VLBI APERTURE SYNTHESIS OBSERVATIONS OF THE OH MASER SOURCE W75 N
HASCHICK, AD
REID, MJ
BURKE, BF
MORAN, JM
MILLER, G
[J]. ASTROPHYSICAL JOURNAL, 1981, 244 (01): : 76 - 87
[4] VLBI OBSERVATIONS OF THE MAIN-LINE OH MASER AROUND U-HERCULIS
SIVAGNANAM, P
DIAMOND, PJ
LESQUEREN, AM
DAIGNE, G
BIRAUD, F
ORTEGAMOLINA, A
GRAHAM, DA
[J]. ASTRONOMY & ASTROPHYSICS, 1988, 194 (1-2) : 157 - 159
[5] VLBI OBSERVATIONS OF THE MASER EMISSION IN THE 4 GROUND-STATE OH TRANSITIONS FROM W3(OH) AND SGR B2
FOUQUET, JE
REID, MJ
[J]. ASTRONOMICAL JOURNAL, 1982, 87 (04): : 691 - 694
[6] VLA AND LOW-FREQUENCY VLBI OBSERVATIONS OF THE RADIO-SOURCE 0503+467 - AUSTERE CONSTRAINTS ON INTERSTELLAR SCATTERING IN 2 MEDIA
SPANGLER, SR
FEY, AL
CORDES, JM
[J]. ASTROPHYSICAL JOURNAL, 1987, 322 (02): : 909 - 916

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