10-μm imaging of omega Centauri: the Mira variable V42 as the counterpart of the IRAS source?

Details 10-μm imaging of omega Centauri: the Mira variable V42 as the counterpart of the IRAS source? 10-μm imaging of omega Centauri: the Mira variable V42 as the counterpart of the IRAS source?

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.277.1125o&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 277, Issue 3, pp. 1125-1128.

Astronomy and Astrophysics

Astronomy

10

Circumstellar Matter, Stars: Evolution, Dust, Extinction, Globular Clusters: Individual: Omega Cen, Infrared: Stars

Scientific paper

For the first time, we have performed 10-μm high spatial resolution imaging of Galactic globular clusters (GGCs) with ESO-TIMMI, and have obtained a firm detection in a 35x35 arcsec^2 field of omega Centauri, about 70 arcsec south and 10 arcsec east of the cluster centre. The detected object is in good positional coincidence with the IRAS point source 13237-4713 and with the Mira variable V42. The most plausible explanation for the detected emission is the presence of a circumstellar envelope around the red giant as a consequence of a currently occurring mass-loss event. This dusty structure, the tracer of a warm dust component, is not resolved within the instrumental point spread function, in good agreement with an expected equilibrium radius of only a few hundred stellar radii. In addition, the coincidence between the Mira variable and the IRAS point source is interesting, because it seems to be a rare event in a globular cluster and implies that most of the mass-loss episode is actually occurring within a short time-scale, in agreement with the theory of mass loss driven by thermal pulsation even in low-mass stars.

Affiliated with

Also associated with

No associations

Rating

10-μm imaging of omega Centauri: the Mira variable V42 as the counterpart of the IRAS source? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with 10-μm imaging of omega Centauri: the Mira variable V42 as the counterpart of the IRAS source?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 10-μm imaging of omega Centauri: the Mira variable V42 as the counterpart of the IRAS source? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1562181