2006A&A...454L.107M


Query : 2006A&A...454L.107M

2006A&A...454L.107M - Astronomy and Astrophysics, volume 454, L107-110 (2006/8-1)

Submillimeter vibrationally excited water emission from the peculiar red supergiant VY Canis Majoris.

MENTEN K.M., PHILIPP S.D., GUESTEN R., ALCOLEA J., POLEHAMPTON E.T. and BRUENKEN S.

Abstract (from CDS):

Vibrationally excited emission from the SiO and H2O molecules probes the innermost circumstellar envelopes of oxygen-rich red giant and supergiant stars. VY CMa is the most prolific known emission source in these molecules. Observations were made to search for rotational lines in the lowest vibrationally excited state of H2O. The APEX telescope was used for observations of H2O lines at frequencies around 300GHz. Two vibrationally excited H2O lines were detected, a third one could not be found. In one of the lines we find evidence for weak maser action, similar to known (sub)millimeter ν2=1 lines. We find that the other line's intensity is consistent with thermal excitation by the circumstellar infrared radiation field. Several SiO lines were detected together with the H2O lines.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - stars: individual: VY Canis Majoris - supergiants - circumstellar matter

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* VY CMa s*r 07 22 58.3261352189 -25 46 03.194390594 12.01 10.068 8.691 7.938   M5Iae 1070 0
2 V* W Hya Mi* 13 49 02.0018313132 -28 22 03.532006894   8.97 7.70     M7.5-9e 628 0

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2023.02.02-19:12:57

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