J/other/NewA/17.160 UBVRI photometry of Stock 18 (Bhatt+, 2012)
Stellar contents and star formation in the young cluster Stock 18.
Bhatt H., Sagar R., Pandey J.-C.
<New Astron., 17, 160-166 (2012)>
=2012NewA...17..160B 2012NewA...17..160B
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, CCD
Keywords: young cluster - star formation - mass function -
mass segregation individual: Stock 18
Abstract:
We have carried out deep (V∼21mag) UBVRI photometric study of the star
cluster Stock 18. These along with archival Infrared data have been
used to derive the basic cluster parameters and also to derive the
basic cluster parameters and also to study the star for formation
processes in and around the cluster region. The distance to the
cluster is derived as 2.8±0.2kpc while its age is estimated as
6.0±2.0Myr. Present study indicates that interstellar reddening is
normal in the direction of the cluster. The mass function slope is
found to be -1.37±0.27 for the mass range 1<M/M☉<11.9. There
is no evidence found for the effect of mass segregation in
main-sequence stars of the cluster. A young stellar population with age
between 1-2Myr have been found in and around the cluster region. The
presence of IRAS and AKARI sources with MSX intensity map also show
the youth of the Sh2-170 region.
Description:
The CCD UBVRI photometric data were acquired using 104-cm
Sampurnanand Telescope (ST) of ARIES, Nainital, on 08/10/2007 and
19/12/2006.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 88 2261 *UBVRI photometric data of the sample stars
in 13'x13' region
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Note on table2.dat: CCD positions of stars are converted into RAJ2000 and
DECJ2000 using the Guide Star Catalogue II (GSC 2.2, 2001).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/2261] Sequential number
6- 13 F8.6 deg RAdeg Right ascension in decimal degrees (J2000)
15- 23 F9.6 deg DEdeg Declination in decimal degrees (J2000)
25- 30 F6.3 mag Umag ?=- Landolt U magnitude
32- 36 F5.3 mag e_Umag ?=- rms uncertainty on Umag
38- 43 F6.3 mag Bmag ?=- Landolt B magnitude
45- 49 F5.3 mag e_Bmag ?=- rms uncertainty on Bmag
51- 56 F6.3 mag Vmag ?=- Landolt V magnitude
58- 62 F5.3 mag e_Vmag ?=- rms uncertainty on Vmag
64- 69 F6.3 mag Rmag ?=- Landolt R magnitude
71- 75 F5.3 mag e_Rmag ?=- rms uncertainty on Rmag
77- 82 F6.3 mag Imag ?=- Landolt I magnitude
84- 88 F5.3 mag e_Imag ?=- rms uncertainty on Umag
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Mar-2012