SIMULTANEOUS OBSERVATIONS OF SiO AND H{sub 2}O MASERS TOWARD KNOWN STELLAR SiO AND H{sub 2}O MASER SOURCES. I

Journal Article · Sat May 15 00:00:00 EDT 2010 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/188/1/209· OSTI ID:21454860

Kim, Jaeheon ^[1]; Cho, Se-Hyung; Oh, Chung Sik; Byun, Do-Young ^[2]

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1. Department of Astronomy and Space Science, Kyung Hee University, Seocheon-Dong, Giheung-Gu, Yongin, Gyeonggi-Do 446-701 (Korea, Republic of)
2. Korean VLBI Network, Korea Astronomy and Space Science Institute, P.O. Box 88, Yonsei University, Seongsan-ro 262, Seodaemun, Seoul 120-749 (Korea, Republic of)

We present the results of simultaneous observations of both SiO and H{sub 2}O masers toward 166 known SiO and H{sub 2}O maser sources using the Korean VLBI Network Yonsei 21 m radio telescope during 2009 June. Both SiO and H{sub 2}O maser emission were detected from 112 sources giving a detection rate of 67% at one epoch observation. SiO-only maser emission was detected from 42 sources, while H{sub 2}O-only maser emission was detected from four sources. Most of the SiO masers appear around the stellar velocity, while H{sub 2}O masers show different characteristics compared with SiO masers. There are more than 20 sources that show a one-way peak or double peaks with respect to the stellar velocity and SiO maser peak velocity. The H{sub 2}O maser peak and integrated intensity ratios with respect to those of SiO (v = 1) show increasingly larger values from Mira variables, to OH/IR stars, to semi-regular variables. In addition, the IRAS two-color diagram of SiO and H{sub 2}O maser observational results is discussed.

• OSTI ID: 21454860
• Journal Information: Astrophysical Journal, Supplement Series, Vol. 188, Issue 1; Other Information: DOI: 10.1088/0067-0049/188/1/209; ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
MASERS
RADIO TELESCOPES
SILICON OXIDES
STARS
WATER
AMPLIFIERS
ANTENNAS
CHALCOGENIDES
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
EQUIPMENT
HYDROGEN COMPOUNDS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OXIDES
OXYGEN COMPOUNDS
RADIO EQUIPMENT
SILICON COMPOUNDS
TELESCOPES