J/MNRAS/379/1237 VIcJHK photometry of NGC 1893 Halpha sources (Maheswar+, 2007)
Champagne flow and triggered star formation in NGC 1893.
Maheswar G., Sharma S., Biman J.M., Pandey A.K., Bhatt H.C.
<Mon. Not. R. Astron. Soc., 379, 1237-1247 (2007)>
=2007MNRAS.379.1237M 2007MNRAS.379.1237M
ADC_Keywords: H II regions ; Photometry, infrared
Keywords: stars: formation - stars: pre-main-sequence - ISM: globules -
HII regions
Abstract:
Using Hα grism spectroscopy and optical and Two-Micron All-Sky
Survey photometry of the fields containing NGC 1893 and two emission
nebulae, Sim 129 and Sim 130, we show the presence of a number of
Hα and near-infrared excess sources towards the region between
HD 242935 and the two emission nebulae. Among them a large majority of
these pre-main-sequence candidate sources are concentrated towards
regions closer to Sim 129 and Sim 130.
Description:
The optical CCD UBV(RI)c photometry of the field containing NGC 1893
was carried out to study the cluster properties (like distance, age,
extinction, reddening law, etc., Paper II, Saurabh et al., in prep.).
The data were obtained on 2005 January 6 using the 2048x2048 pixel CCD
camera mounted on the f/13 Cassegrain focus of the 104-cm Sampurnanand
telescope of ARIES, Nainital. An Hα emission survey of the field
containing Sim 129, Sim 130 was conducted on 2005 January 25 using
Hanle Faint Object Spectrograph Camera (HFOSC) at the f/9 Cassegrain
focus of Himalayan Chandra Telescope (HCT) at Hanle, India. The NIR
JHKs magnitudes of the stars within a circle of radius 30' about
IRAS 05198+3325 were obtained from 2MASS catalogue (Cutri et al.,
2003, Cat. II/246).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 60 49 *Our optical and 2MASS NIR results for the 49
sources are presented.
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Note on table1.dat: The Hα sources detected in our slitless spectroscopy
are identified. CPM 16 and S1R2N35 are not included here.
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [MSB2007] Sequential number
3 A1 --- n_[MSB2007] [a] a for Hα sources detected in
our slitless spectroscopy
5- 8 F4.2 arcmin r Angular separation from IRAS 05198+3325
10- 16 F7.4 deg RAdeg Right ascension in decimal degrees (J2000)
19- 25 F7.4 deg DEdeg Declination in decimal degrees (J2000)
27- 31 F5.2 mag Vmag V magnitude
33- 36 F4.2 mag V-Ic V-Ic colour index
38- 42 F5.2 mag Jmag 2MASS J magnitude
44- 47 F4.2 mag J-H 2MASS J-H colour index
49- 52 F4.2 mag H-K 2MASS H-K colour index
54- 60 A7 --- ID Halpha sources identified by
Marco & Negueruela (2002A&A...393..195M 2002A&A...393..195M) (1)
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Note (1): Simbad denominations for Halpha sources identified as follows:
S1R2N23 = Cl* NGC 1893 CUF 1223
S1R2N38 = Cl* NGC 1893 CUF 1238
E 18 = Cl* NGC 1893 NMI E18
E 13 = Cl* NGC 1893 NMI E13
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Dec-2007