SiO MASERS AROUND WX PSC MAPPED WITH THE KVN AND VERA ARRAY (KaVA)

doi:10.3847/0004-637X/822/1/3

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	SiO MASERS AROUND WX PSC MAPPED WITH THE KVN AND VERA ARRAY (KaVA)
	Yun, Youngjoo 11; Cho, Se-Hyung 11; Imai, Hiroshi 12; Kim, Jaeheon 11; Asaki, Yoshiharu 1; Chibueze, James O.13; Choi, Yoon Kyung 11; Dodson, Richard 14; Kim, Dong-Jin 2,11; Kusuno, Kozue 3
刊名	ASTROPHYSICAL JOURNAL
	2016-05-01
卷号	822 期号:1
关键词	Instrumentation: Interferometers Masers Stars: Individual (Wx Psc) Stars: Late-type Techniques: High Angular Resolution
ISSN号	0004-637X
DOI	10.3847/0004-637X/822/1/3
英文摘要	We present the first images of the v = 1 and v = 2 J = 1 -> 0 SiO maser lines taken with KaVA, i.e., the combined array of the Korean Very Long Baseline Interferometry (VLBI) Network and the VLBI Exploration of Radio Astrometry ( VERA), toward the OH/IR star WX Psc. The combination of long and short antenna baselines enabled us to detect a large number of maser spots, which exhibit a typical ring-like structure in both the v. =. 1 and v = 2 J = 1 -> 0 SiO masers as those that have been found in previous VLBI observational results of WX Psc. The relative alignment of the v = 1 and v = 2 SiO maser spots are precisely derived from astrometric analysis, due. to the absolute coordinates of the reference maser spot that were well determined in an independent astrometric observation with VERA. The superposition of the v = 1 and v = 2 maser spot maps shows a good spatial correlation between the v = 1 and v = 2 SiO maser features. Nevertheless, it is also shown that the v = 2 SiO maser spot is distributed in an inner region compared to the v - 1 SiO maser by about 0.5 mas on average. These results provide good support for the recent theoretical studies of the SiO maser pumping, in which both the collisional and the radiative pumping predict the strong spatial correlation and the small spatial discrepancy between the v = 1 and v = 2 SiO maser.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000377154100003
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32797]
专题	中国科学院上海天文台
通讯作者	Yun, Youngjoo; Cho, Se-Hyung
作者单位	1.JAO, Chile Observ, NAOJ, Alonso Cordova 3107,Vitacura 763 0355, Santiago, Chile 2.Yonsei Univ, Dept Astron, 50 Yonsei Ro, Seoul 120749, South Korea 3.Grad Univ Adv Studies SOKENDAI, Sch Phys Sci, Dept Space & Astronaut Sci, Chuou Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2525210, Japan 4.Natl Astron Observ Japan, Mizusawa VLBI Observ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 5.Grad Univ Adv Studies SOKENDAI, Dept Astron Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 6.Observat Astron Nacl IGN, Alfonso XII, E-28014 Madrid, Spain 7.Seoul Natl Univ, Dept Phys & Astron, Astron Program, 1 Gwanak Ro, Seoul 151742, South Korea 8.Natl Astron Observ Japan, Mizusawa VLBI Observ, Mizusawa Ku, 2-12 Hoshigaoka Cho, Oshu, Iwate 0230861, Japan 9.Teikyo Univ Sci, Ctr Fundamental Educ, 2525 Yatsusawa, Uenohara, Yamanashi 4090193, Japan 10.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Yun, Youngjoo,Cho, Se-Hyung,Imai, Hiroshi,et al. SiO MASERS AROUND WX PSC MAPPED WITH THE KVN AND VERA ARRAY (KaVA)[J]. ASTROPHYSICAL JOURNAL,2016,822(1).
APA	Yun, Youngjoo.,Cho, Se-Hyung.,Imai, Hiroshi.,Kim, Jaeheon.,Asaki, Yoshiharu.,...&Yeom, Jae-Hwan.(2016).SiO MASERS AROUND WX PSC MAPPED WITH THE KVN AND VERA ARRAY (KaVA).ASTROPHYSICAL JOURNAL,822(1).
MLA	Yun, Youngjoo,et al."SiO MASERS AROUND WX PSC MAPPED WITH THE KVN AND VERA ARRAY (KaVA)".ASTROPHYSICAL JOURNAL 822.1(2016).