Open AccessInfall and SiO emission in V838 Mon
Author(s) -
Rushton M. T.,
Geballe T. R.,
Evans A.,
Smalley B.,
Van Loon J. Th.,
Eyres S. P. S.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.08936.x
Subject(s) - physics , astrophysics , supergiant , overtone , emission spectrum , variable star , infrared , astronomy , spectroscopy , spectral line , stars
We present moderate‐ and high‐resolution infrared spectroscopy of the peculiar eruptive variable V838 Mon, which underwent a series of remarkable outbursts in early 2002. During the period covered by our observations, 2002 December–2003 December, the near‐infrared spectrum continued to show many of the characteristics of a very cool supergiant. However, throughout this period the spectrum also revealed strong and variable SiO first overtone emission, and Paβ emission. The 2003 December spectrum contained a series of Ti i lines with inverse P Cygni profiles. This is clear evidence that some material is falling inward towards the star.