Accession Number : ADA538716


Title :   Galactic Bulge Giants: Probing Stellar and Galactic Evolution. 1. Catalogue of Spitzer IRAC and MIPS Sources (PREPRINT)


Descriptive Note : Electronic preprint


Corporate Author : KATHOLIEKE UNIV LEUVEN (BELGIUM)


Personal Author(s) : Uttenthaler, Stefan ; Stute, Matthias ; Sahai, Raghvendra ; Blommaert, Joris A ; Schultheis, Mathias ; Kraemer, Kathleen E ; Groenewegen, Martin A ; Price, Stephan D


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a538716.pdf


Report Date : 29 Dec 2010


Pagination or Media Count : 23


Abstract : 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.


Descriptors :   *INFRARED RADIATION , *GALAXIES , *STELLAR EVOLUTION , *IMAGE PROCESSING , TELESCOPES , DATA REDUCTION , SPACE SYSTEMS , STARS , DATA BASES


Subject Categories : Astronomy
      Infrared Detection and Detectors


Distribution Statement : APPROVED FOR PUBLIC RELEASE