J/MNRAS/355/1237 JHKs photometry of G287.84-0.82 members (Hagele+, 2004)
G287.84-0.82: an infrared star cluster in the Carina nebula.
Hagele G.F., Albacete Colombo J.F., Barba R.H., Bosch G.L.
<Mon. Not. R. Astron. Soc., 355, 1237-1243 (2004)>
=2004MNRAS.355.1237H 2004MNRAS.355.1237H
ADC_Keywords: Associations, stellar ; Stars, pre-main sequence ;
Photometry, infrared
Keywords: stars: formation - stars: pre-main-sequence -
open clusters and associations: individual: Carina nebula -
open clusters and associations: individual: G287.84-0.82 -
open clusters and associations: individual: NGC 3372 - infrared: stars
Abstract:
We have studied the properties of an infrared cluster embedded in the
gas and dust of the southern part of the Carina nebula (NGC 3372),
where the probable existence of current star formation has already
been predicted. We used mid-infrared (A and C bands) and near-infrared
(JHKs) images from the Midcourse Space Experiment and the Two-Micron
All-Sky Survey, respectively, combined with an optical Hα
narrow-band filter image obtained at the Cerro Tololo Inter-American
Observatory. The infrared star cluster has at least 17 members, and
its parameters, radius and stellar density are in very good agreement
with high- to intermediate-mass star formation scenarios. The detected
infrared sources have roughly the same intrinsic infrared excess
determined from their position in colour-colour and colour-magnitude
diagrams, suggesting that these objects could be related to
pre-main-sequence stars of high to intermediate mass. Furthermore, we
present a low-dispersion spectrum of the LS 1883 (O9.5V) star located
near the centre of the infrared cluster. The position of this object
in the colour-colour and colour-magnitude infrared diagrams lies close
to the reddening vector of a zero-age main-sequence O9V spectral-type
star, and it seems to be the first star of this cluster to emerge. All
these facts are consistent with the current star-forming scenarios
associated with highly embedded star clusters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 17 2MASS photometry for the IR star cluster candidates
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/AJ/126/1423 : MSX 8.3um fluxes of star-forming regions (Kraemer+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 deg RAdeg Right ascension in decimal degrees (J2000)
12- 21 F10.6 deg DEdeg Declination in decimal degrees (J2000)
23- 27 F5.2 mag Jmag 2MASS J (1.25um) magnitude
29- 32 F4.2 mag e_Jmag ? rms uncertainty on Jmag
34- 38 F5.2 mag Hmag 2MASS H (1.65um) magnitude
40- 43 F4.2 mag e_Hmag ? rms uncertainty on Hmag
45- 49 F5.2 mag Ksmag 2MASS Ks (2.17um) magnitude
51- 54 F4.2 mag e_Ksmag ? rms uncertainty on Ksmag
56- 59 F4.2 mag H-Ks 2MASS H-Ks colour index
61- 64 F4.2 mag e_H-Ks ? rms uncertainty on H-Ks
66- 69 F4.2 mag J-H 2MASS J-H colour index
71- 74 F4.2 mag e_J-H ? rms uncertainty on J-H
76- 77 A2 --- [HAB2004b] Identification, according to Fig. 1(b).
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Jun-2005