J/A+A/559/A98 JK photometry in BUL_SC9 and BUL_SC29 (Valenti+, 2013)
Stellar ages through the corners of the boxy bulge.
Valenti E., Zoccali M., Renzini A., Brown T.M., Gonzalez O., Minniti D.,
Debattista V.P., Mayer L.
<Astron. Astrophys. 559, A98 (2013)>
=2013A&A...559A..98V 2013A&A...559A..98V
ADC_Keywords: Milky Way ; Photometry, infrared
Keywords: Galaxy: bulge - Galaxy: formation - methods: observational -
techniques: photometric
Abstract:
In some scenarios for the formation of the Milky Way bulge, the
stellar population at the edges of the boxy bulge may be younger than
those on the minor axis or close to the Galactic center. So far the
only bulge region where deep color-magnitude diagrams have been
obtained is indeed along the minor axis. To overcome this limitation,
we aim to age-date the bulge stellar populations far away from the
bulge minor axis.
Color-magnitude diagrams and luminosity functions have been obtained
from deep near-IR VLT/HAWK-I images taken at the two Southern corners
of the boxy bulge, i.e., near the opposite edges of the Galactic bar.
The foreground disk contamination has been statistically removed using
a pure disk field observed with the same instrument and located
approximately at similar Galactic latitudes of the two bulge fields
and ∼30° in longitude away from the Galactic center. For each
bulge field, mean reddening and distance are determined using the
position of red clump stars, and the metallicity distribution is
derived photometrically using the color distribution of stars in the
upper red giant branch.
Description:
Photometric catalogues of two bulge fields located at the edge of the
edge of the Galactic bar. The J and K magnitudes have been calibrated
onto the 2MASS photometric system. The position of the detected
sources has been astrometrized by using 2MASS catalogs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
bul_sc9.dat 67 49145 J,K photometry of field BUL-SC9
bul_sc29.dat 67 45164 J,K photometry of field BUL-SC29
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/AcA/52/217 : OGLE II. VI photometry of Galactic Bulge (Udalski+, 2002)
J/MNRAS/348/1439 : OGLE II Galactic center proper motions (Sumi+, 2004)
Byte-by-byte Description of file: bul_sc9.dat bul_sc29.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Sequential number within the field
9- 14 F6.3 mag Jmag Derived J magnitude
16- 20 F5.3 mag e_Jmag Error associated to Jmag
24- 29 F6.3 mag Kmag Derived K magnitude
31- 35 F5.3 mag e_Kmag Error associated to Kmag
39- 51 F13.9 deg RAdeg Right Ascension (J2000)
55- 67 F13.9 deg DEdeg Declination (J2000)
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Acknowledgements:
Elena Valenti, evalenti(at)eso.org
(End) Elena Valenti [ESO], Patricia Vannier [CDS] 17-Sep-2013