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MSX, 2MASS, and the LARGE MAGELLANIC CLOUD: A Combined Near- and Mid-Infrared View
The Large Magellanic Cloud (LMC) has been observed by the MidcourseSpace Experiment (MSX) in the mid-infrared and the Two Micron All SkySurvey (2MASS) in the near-infrared. We have performed across-correlation of the 1806 MSX catalog sources and nearly 1.4 million2MASS cataloged point and extended sources and find 1664 matches. Usingthe available color information, we identify a number of stellarpopulations and nebulae, including main-sequence stars, giant stars, redsupergiants, carbon- and oxygen-rich asymptotic giant branch (AGB)stars, planetary nebulae, H II regions, and other dusty objects likelyassociated with early-type stars. A total of 731 of these sources haveno previous identification. We compile a listing of all objects, whichincludes photometry and astrometry. The 8.3 μm MSX sensitivity is thelimiting factor for object detection: only the brighter red objects,specifically the red supergiants, AGB stars, planetary nebulae, and H IIregions, are detected in the LMC. The remaining objects are likely inthe Galactic foreground. The spatial distribution of the infrared LMCsources may contribute to understanding stellar formation and evolutionand the overall galactic evolution. We demonstrate that a combined mid-and near-infrared photometric baseline provides a powerful means ofidentifying new objects in the LMC for future ground-based andspace-based follow-up observations.

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Dades d'Observació i Astrometria

Constel·lació:Mensa
Ascensió Recta:05h26m38.60s
Declinació:-73°39'54.8"
Magnitud Aparent:7.362
Distancia:160.772 parsecs
Moviment propi RA:45.7
Moviment propi Dec:76.9
B-T magnitude:8.82
V-T magnitude:7.483

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 36791
TYCHO-2 2000TYC 9174-310-1
USNO-A2.0USNO-A2 0150-03087640
HIPHIP 25451

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