SiO maser survey of the galactic disk IRAS sources. I. 15° < l < 25°, near end of the galactic bar

Hideyuki Izumiura; Shuji Deguchi; Takahiro Fujii; Osamu Kameya; Shigeru Matsumoto; Yoshikazu Nakada; Takafumi Ootsubo; Nobuharu Ukita

doi:10.1086/313266

SiO maser survey of the galactic disk IRAS sources. I. 15° < l < 25°, near end of the galactic bar

Hideyuki Izumiura, Shuji Deguchi, Takahiro Fujii, Osamu Kameya, Shigeru Matsumoto, Yoshikazu Nakada, Takafumi Ootsubo, Nobuharu Ukita

SCI - Astronomy

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

A survey has been made in the SiO J = 1-0, v = 1 and 2 transitions (∼43 GHz) for the color-selected IRAS sources in the Galactic disk area of 15° < l < 25° and \b\ < 3° with the Nobeyama 45 m telescope. We have detected 67 out of 119 observed sources in SiO masers. Distances to the sources are deduced by the IRAS 12 and 25 μm flux densities and range approximately from 2 to 12 kpc. The lines of sight of this region cross the location of the near end of the bar in the Galaxy. Radial velocities of the detected sources spread between -100 and 200 km s^-1. This range slightly exceeds the possible limits expected from Galactic rotation. A comparison of the SiO with the CO and H I velocity-longitude (v-l) diagrams reveals that the overall distribution of the SiO maser sources on the v-l diagram resembles the molecular ring feature. Observational data are compared with the theoretical results of the bar models.

Original language	English
Pages (from-to)	257-276
Number of pages	20
Journal	Astrophysical Journal, Supplement Series
Volume	125
Issue number	1
DOIs	https://doi.org/10.1086/313266
Publication status	Published - 1999 Nov

Keywords

ISM: kinematics and dynamics
ISM: molecules
Masers
Radio continuum: ISM
Surveys

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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SiO maser survey of the galactic disk IRAS sources. I. 15° < l < 25°, near end of the galactic bar. / Izumiura, Hideyuki; Deguchi, Shuji; Fujii, Takahiro; Kameya, Osamu; Matsumoto, Shigeru; Nakada, Yoshikazu; Ootsubo, Takafumi; Ukita, Nobuharu.

In: Astrophysical Journal, Supplement Series, Vol. 125, No. 1, 11.1999, p. 257-276.

Research output: Contribution to journal › Article › peer-review

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abstract = "A survey has been made in the SiO J = 1-0, v = 1 and 2 transitions (∼43 GHz) for the color-selected IRAS sources in the Galactic disk area of 15° < l < 25° and \b\ < 3° with the Nobeyama 45 m telescope. We have detected 67 out of 119 observed sources in SiO masers. Distances to the sources are deduced by the IRAS 12 and 25 μm flux densities and range approximately from 2 to 12 kpc. The lines of sight of this region cross the location of the near end of the bar in the Galaxy. Radial velocities of the detected sources spread between -100 and 200 km s-1. This range slightly exceeds the possible limits expected from Galactic rotation. A comparison of the SiO with the CO and H I velocity-longitude (v-l) diagrams reveals that the overall distribution of the SiO maser sources on the v-l diagram resembles the molecular ring feature. Observational data are compared with the theoretical results of the bar models.",

keywords = "ISM: kinematics and dynamics, ISM: molecules, Masers, Radio continuum: ISM, Surveys",

author = "Hideyuki Izumiura and Shuji Deguchi and Takahiro Fujii and Osamu Kameya and Shigeru Matsumoto and Yoshikazu Nakada and Takafumi Ootsubo and Nobuharu Ukita",

year = "1999",

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AU - Izumiura, Hideyuki

AU - Deguchi, Shuji

AU - Fujii, Takahiro

AU - Kameya, Osamu

AU - Matsumoto, Shigeru

AU - Nakada, Yoshikazu

AU - Ootsubo, Takafumi

AU - Ukita, Nobuharu

PY - 1999/11

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N2 - A survey has been made in the SiO J = 1-0, v = 1 and 2 transitions (∼43 GHz) for the color-selected IRAS sources in the Galactic disk area of 15° < l < 25° and \b\ < 3° with the Nobeyama 45 m telescope. We have detected 67 out of 119 observed sources in SiO masers. Distances to the sources are deduced by the IRAS 12 and 25 μm flux densities and range approximately from 2 to 12 kpc. The lines of sight of this region cross the location of the near end of the bar in the Galaxy. Radial velocities of the detected sources spread between -100 and 200 km s-1. This range slightly exceeds the possible limits expected from Galactic rotation. A comparison of the SiO with the CO and H I velocity-longitude (v-l) diagrams reveals that the overall distribution of the SiO maser sources on the v-l diagram resembles the molecular ring feature. Observational data are compared with the theoretical results of the bar models.

AB - A survey has been made in the SiO J = 1-0, v = 1 and 2 transitions (∼43 GHz) for the color-selected IRAS sources in the Galactic disk area of 15° < l < 25° and \b\ < 3° with the Nobeyama 45 m telescope. We have detected 67 out of 119 observed sources in SiO masers. Distances to the sources are deduced by the IRAS 12 and 25 μm flux densities and range approximately from 2 to 12 kpc. The lines of sight of this region cross the location of the near end of the bar in the Galaxy. Radial velocities of the detected sources spread between -100 and 200 km s-1. This range slightly exceeds the possible limits expected from Galactic rotation. A comparison of the SiO with the CO and H I velocity-longitude (v-l) diagrams reveals that the overall distribution of the SiO maser sources on the v-l diagram resembles the molecular ring feature. Observational data are compared with the theoretical results of the bar models.

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KW - Radio continuum: ISM

KW - Surveys

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