Display data from paper

Select data type:

JIA96 - SiO Maser Sources in the Outer Disk of the Galaxy

Short title: Jiang et al. (1996)
Authors: Jiang, B. W. Deguchi, S. Yamamura, I. Nakada, Y. Cho, S. H. Yamagata, T.
Journal: Astrophysical Journal Supplement v.106, p.463
Bibcode:

Abstract
The observations in the ²⁸SiO j = 1-0 V = 1, J = 1-0 V = 2 lines and the ²⁹SiO j = 1-0, V = 0 lines were simultaneously made toward 181 color-selected IRAS sources in the outer disk of the Galaxy (at longitudes between 90� and 250�). The ²⁸SiO lines were detected in 63 sources (56 new) and the ²⁹SiO line in 11 sources (9 new). Most of the detections are optically variable stars, mainly Mira-type variables and a few semiregular variables. The detection rate (35%) is much lower than that of the bulge survey performed by the same observational system the 45 m telescope at Nobeyama Radio Observatory. The lower detection rate of SiO maser emission is partly attributed to the increase of contaminations by stars with C-rich circumstellar envelopes and young stellar objects in the outer disk sample. The kinematical implications of the observational results are also discussed. The luminosity distances to the SiO maser sources are estimated from their IRAS fluxes at 12 mum and colors. By combining the SiO radial velocity and the luminosity distance, the rotation curve of the outer Galactic disk is found to be slightly falling within the Galactocentric distance between 8.5 and 12 kpc. The sources located within 20� from the Galactic anticenter direction are used to check for a peculiar motion of the local standard of rest.

Abstract

The observations in the ²⁸SiO j = 1-0 V = 1, J = 1-0 V = 2 lines and the ²⁹SiO j = 1-0, V = 0 lines were simultaneously made toward 181 color-selected IRAS sources in the outer disk of the Galaxy (at longitudes between 90� and 250�). The ²⁸SiO lines were detected in 63 sources (56 new) and the ²⁹SiO line in 11 sources (9 new). Most of the detections are optically variable stars, mainly Mira-type variables and a few semiregular variables. The detection rate (35%) is much lower than that of the bulge survey performed by the same observational system the 45 m telescope at Nobeyama Radio Observatory. The lower detection rate of SiO maser emission is partly attributed to the increase of contaminations by stars with C-rich circumstellar envelopes and young stellar objects in the outer disk sample. The kinematical implications of the observational results are also discussed. The luminosity distances to the SiO maser sources are estimated from their IRAS fluxes at 12 mum and colors. By combining the SiO radial velocity and the luminosity distance, the rotation curve of the outer Galactic disk is found to be slightly falling within the Galactocentric distance between 8.5 and 12 kpc. The sources located within 20� from the Galactic anticenter direction are used to check for a peculiar motion of the local standard of rest.

Download as: Table (CSV)
View as list of objects

Detection table from Jiang et al. (1996)

Export table to csv

Hide / Show individual components

Non-detection table from Jiang et al. (1996)