NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Galactic Bulge Giants: Probing Stellar and Galactic Evolution. 1. Catalogue of Spitzer IRAC and MIPS Sources (PREPRINT)Aims. We aim at measuring mass-loss rates and the luminosities of a statistically large sample of Galactic bulge stars at several galactocentric radii. The sensitivity of previous infrared surveys of the bulge has been rather limited, thus fundamental questions for late stellar evolution, such as the stage at which substantial mass-loss begins on the red giant branch and its dependence on fundamental stellar properties, remain unanswered. We aim at providing evidence and answers to these questions. Methods. To this end, we observed seven 15 15 arcmin2 fields in the nuclear bulge and its vicinity with unprecedented sensitivity using the IRAC and MIPS imaging instruments on-board the Spitzer Space Telescope. In each of the fields, tens of thousands of point sources were detected. Results. In the first paper based on this data set, we present the observations, data reduction, the final catalogue of sources, and a detailed comparison to previous mid-IR surveys of the Galactic bulge, as well as to theoretical isochrones. We find in general good agreement with other surveys and the isochrones, supporting the high quality of our catalogue.
Document ID
20120008057
Document Type
Reprint (Version printed in journal)
Authors
Uttenthaler, Stefan (K.U. Leuven Leuven, Belgium)
Stute, Matthias (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sahai, Raghvendra (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Blommaert, Joris A. (K. U. Leuven Leuven, Belgium)
Schultheis, Mathias (Observatoire de Besancon France)
Kraemer, Kathleen E. (Air Force Research Lab. Hanscom AFB, MA, United States)
Groenewegen, Martin A. (Royal Observatory Brussels, Belgium)
Price, Stephan D. (Air Force Research Lab. Hanscom AFB, MA, United States)
Date Acquired
August 25, 2013
Publication Date
December 29, 2010
Subject Category
Astronomy
Report/Patent Number
AD-A538716
ARXIV:1002.5015V1
Funding Number(s)
CONTRACT_GRANT: MRTN-CT-2004 005592
CONTRACT_GRANT: G.0470.07
Distribution Limits
Public
Copyright
Other
Keywords
CMD(COLOR MAGNITUDE DIAGRAMS)
IRAC(INFRARED ARRAY CAMERAS)
ISOCHRONES
MIPS(MULTIBAND IMAGING PHOTOMETERS FOR SPITZER)
SPITZER SCIENCE CENTER
GB(GALACTIC BULGES)
RGB(RED GIANT BRANCHES)