Hostname: page-component-7bb8b95d7b-cx56b Total loading time: 0 Render date: 2024-09-11T09:21:30.742Z Has data issue: false hasContentIssue false
  • English
  • Français

Highly polarized SiO v = 0 emission from late-type stars

Published online by Cambridge University Press:  03 August 2017

Hiroko Shinnaga ,
Masato Tsuboi  and
Takashi Kasuga
Hiroko Shinnaga
Affiliation:
Institute of Astronomy and Astrophysics, Academia Sinica(ASIAA), P. O. Box 23-141 Taipei, Taiwan 106, ROC Institute of Astrophysics and Planetary Science, Ibaraki University, 2-1-1 Bunkyo, Mito, 310-8512, Japan
Masato Tsuboi
Affiliation:
Institute of Astrophysics and Planetary Science, Ibaraki University, 2-1-1 Bunkyo, Mito, 310-8512, Japan
Takashi Kasuga
Affiliation:
Department of System and Control Engineeri, Hosei University, Kajino, Koganei, Tokyo, 184-8584, Japan

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We briefly report the results of polarimetric observations of SiO emission from late-type stars taken with a millimeter polarimeter installed at the Nobeyama 45m telescope. We found that the SiO J = 2 − 1 emission in the v = 0 state from R Cas contains a highly linearly polarized component, followed by the detection of highly linearly polarized emission of the same transition from VY CMa (Shinnaga et al. 1999). The high polarization degree is a strong evidence that the v = 0 emission originates from maser action. We found out that, not only a peculiar supergiant star, but also a Mira variable star is associated with the SiO v = 0 maser.

Type
Part 2. Stellar Masers
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 278 - 281
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Buhl, D., Snyder, L.E., Lovas, F.J., & Johnson, D.R. 1975, ApJ, 201, L29 CrossRefGoogle Scholar
Cahn, J.H., & Elitzur, M. 1979, ApJ, 231, 124 CrossRefGoogle Scholar
Cho, S.-H., Kaifu, N., & Ukita, N. 1996, A&AS, 115, 117 Google Scholar
Danchi, W.C., Bester, M., Degiacomi, C.G., Greenhill, L.J., & Townes, C.H. 1994, AJ, 107, 1469 Google Scholar
Deguchi, S., Watson, W.D., & Western, L.R. 1986, ApJ, 302, 108 Google Scholar
Desmurs, J.F., Bujarrabal, V., Colomer, F., & Alcolea, J. 2000, A&A, 360, 189 Google Scholar
Elitzur, M. 1991, ApJ, 370, 407 Google Scholar
Goldreich, P., Keeley, D.A., & Kwan, J.Y. 1973, ApJ, 179, 111 CrossRefGoogle Scholar
Kemball, A.J., & Diamond, P.J. 1997, ApJ, 481, L111 Google Scholar
Lada, C.J., & Reid, M.J. 1978, ApJ, 219, 95 Google Scholar
Proust, D., Ochsenbein, F., & Pettersen, B.R. 1981, A&AS, 44, 179 Google Scholar
Snyder, L.E., & Buhl, D. 1974, ApJ, 189, L31 Google Scholar
Shinnaga, H., Tsuboi, M., & Kasuga, T. 1999, PASJ, 51, 175 Google Scholar
Shinnaga, H., Tsuboi, M., & Kasuga, T. 2001, in preparation Google Scholar
Troland, T.H., Heiles, C., Johnson, D.R., & Clark, F.O. 1979, ApJ, 232, 143 Google Scholar
Tsuboi, M., Ohta, E., Kawabata, T., Kasuga, T., Hatayama, K., Murata, Y., Kato, T., & Handa, T. 1994, in The 19th international conference on Infrared and Millimeter Waves, ed. Sakai, K. & Yoneyama, T. (Tokyo: JSAP), 252 Google Scholar
Watson, W.D. 1994, ApJ, 424, L37 1990, ApJ, 99, 1299 Google Scholar