Discovery of multiple shells around V838 Monocerotis

被引:16
作者
van Loon, JT [1 ]
Evans, A [1 ]
Rushton, MT [1 ]
Smalley, B [1 ]
机构
[1] Univ Keele, Sch Chem & Phys, Astrophys Grp, Keele ST5 5BG, Staffs, England
来源
ASTRONOMY & ASTROPHYSICS | 2004年 / 427卷 / 01期
关键词
stars : AGB and post-AGB; stars : circumstellar matter; stars : distances; stars : individual : V838 Monocerotis; stars : mass-loss; stars : peculiar;
D O I
10.1051/0004-6361:20041388
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report the discovery of multiple shells around the eruptive variable star V838 Mon. Two dust shells are seen in IRAS and MSX images, which themselves are situated in a shell of CO. This securely establishes V838 Mon as an evolved object. We revisit the light echo, which arises from scattering off the innermost resolved dust shell, to infer a distance to V838 Mon of greater than or similar to 5.5 kpc. The dynamical timescales of the ejected shells, location in the Milky Way and inferred luminosity are consistent with V838 Mon being a low-mass AGB star experiencing thermal pulses of which the 2002 eruption might have sent the star into the post-AGB phase. This scenario, however, is inconsistent with the presence of a ( young and massive) B3 V companion.
引用
收藏
页码:193 / 197
页数:5
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