STRUCTURAL PARAMETERS OF GALAXIES IN CANDELS

Journal Article · Sat Dec 15 04:00:00 EST 2012 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/203/2/24· OSTI ID:22089757

Van der Wel, A.; Chang, Yu-Yen; Rix, H. -W. ^[1]; Bell, E. F. ^[2]; Haeussler, B.; Hartley, W. ^[3]; McGrath, E. J.; Cheung, E.; Faber, S. M.; Kocevski, D. D.; Mozena, M. ^[4]; Yicheng, Guo ^[5]; McIntosh, D. H. ^[6]; Barden, M. ^[7]; Ferguson, H. C.; Grogin, N. A.; Koekemoer, A. M.; Lotz, J. ^[8]; Galametz, A. ^[9]; others, and

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1. Max-Planck Institut fuer Astronomie, Koenigstuhl 17, D-69117 Heidelberg (Germany)
2. Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48109 (United States)
3. Schools of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD (United Kingdom)
4. UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)
5. Astronomy Department, University of Massachusetts, 710 North Pleasant Street, Amherst, MA 01003 (United States)
6. Department of Physics and Astronomy, University of Missouri-Kansas City, 5110 Rockhill Road, Kansas City, MO 64110 (United States)
7. Institute of Astro- and Particle Physics, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck (Austria)
8. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)
9. INAF-Osservatorio di Roma, Via Frascati 33, I-00040 Monteporzio (Italy)

We present global structural parameter measurements of 109,533 unique, H{sub F160W}-selected objects from the CANDELS multi-cycle treasury program. Sersic model fits for these objects are produced with GALFIT in all available near-infrared filters (H{sub F160W}, J{sub F125W} and, for a subset, Y{sub F105W}). The parameters of the best-fitting Sersic models (total magnitude, half-light radius, Sersic index, axis ratio, and position angle) are made public, along with newly constructed point-spread functions for each field and filter. Random uncertainties in the measured parameters are estimated for each individual object based on a comparison between multiple, independent measurements of the same set of objects. To quantify systematic uncertainties, we create a mosaic with simulated galaxy images with a realistic distribution of input parameters and then process and analyze the mosaic in an identical manner as the real data. We find that accurate and precise measurements-to 10% or better-of all structural parameters can typically be obtained for galaxies with H{sub F160W} < 23, with comparable fidelity for basic size and shape measurements for galaxies to H{sub F160W} {approx} 24.5.

• OSTI ID: 22089757
• Journal Information: Astrophysical Journal, Supplement Series, Journal Name: Astrophysical Journal, Supplement Series Journal Issue: 2 Vol. 203; ISSN 0067-0049; ISSN APJSA2
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ASTROPHYSICS
CATALOGS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
COSMOLOGY
GALAXIES
IMAGES
RANDOMNESS
RED SHIFT
STATISTICS
VISIBLE RADIATION