2MASS Counterparts for OH/IR Stars. I. The Arecibo Sample

Details 2MASS Counterparts for OH/IR Stars. I. The Arecibo Sample 2MASS Counterparts for OH/IR Stars. I. The Arecibo Sample

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aj....127..501l&link_type=abstract

The Astronomical Journal, Volume 127, Issue 1, pp. 501-512.

Astronomy and Astrophysics

Astronomy

7

Infrared: Stars, Radio Lines: Stars, Stars: Agb And Post-Agb

Scientific paper

The positions of the IRAS counterparts to the 420 OH/IR stars in the Arecibo sky (0°<δ<+38°) are usually accurate to better than 10". But every star has recently been observed by the Two Micron All Sky Survey (2MASS), which provides ~0.2" quality positions, while those with |b|<=4.5d have also been observed by the Midcourse Space Experiment (MSX), which provides ~2" quality positions. We use the MSX and/or IRAS coordinates to guide us to 2MASS counterparts for the 134 Arecibo OH/IR stars with images in the second release of the 2MASS Point Source Catalog. An unexpected by-product of having the J-H versus H-Ks plot generated from the 2MASS fluxes is the realization that most (~85%) of the redder OH/IR stars have detached circumstellar shells. We identify five objects that probably, by contrast, have ``normal'' shells, and we confirm the status of AU Vul as a protoplanetary nebula.

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