J/ApJ/896/29 Deep UBVRI photometry of NGC6910 members (Kaur+, 2020)
Unveiling the physical conditions in NGC 6910.
Kaur H., Sharma S., Dewangan L.K., Ojha D.K., Durgapal A., Panwar N.
<Astrophys. J., 896, 29 (2020)>
=2020ApJ...896...29K 2020ApJ...896...29K
ADC_Keywords: Clusters, open; Photometry, UBVRI; Proper motions
Keywords: Open star clusters ; Star formation ; Initial mass function ;
Luminosity function
Abstract:
Deep and wide-field optical photometric observations along with
multiwavelength archival data sets have been employed to study the
physical properties of the cluster NGC 6910. The study also examines
the impact of massive stars on their environment. The age, distance,
and reddening of the cluster are estimated to be ∼4.5Myr,
1.72±0.08kpc, and E(B-V)min=0.95mag, respectively. The mass
function slope (Γ=-0.74±0.15) in the cluster region is found
to be flatter than the Salpeter value (-1.35), indicating the presence
of an excess number of massive stars. The cluster also shows mass
segregation toward the central region due to their formation
processes. The distribution of warm dust emission is investigated
toward the central region of the cluster, showing the signature of the
impact of massive stars within the cluster region. Radio continuum
clumps powered by massive B-type stars (age range ∼0.07-0.12Myr) are
traced that are located away from the center of the stellar cluster
NGC 6910 (age ∼4.5Myr). Based on the values of different pressure
components exerted by massive stars, the photoionized gas associated
with the cluster is found to be the dominant feedback mechanism in the
cluster. Overall, the massive stars in the cluster might have
triggered the birth of young, massive B-type stars in the cluster.
This argument is supported with evidence of the observed age gradient
between the cluster and the powering sources of the radio clumps.
Description:
The optical CCD UBV(RI)c photometric data of the NGC 6910 region,
centered at RAJ2000=20h23m12s,DEJ2000=+40d46'42", l=78.683°, and
b=2.013°, were acquired by using the 2048x2048pixel2 CCD camera
mounted on the f/13 Cassegrain focus of the 104cm Sampurnanand
telescope of the Aryabhatta Research Institute of Observational
Sciences (ARIES), Nainital, India. We have carried out observations of
this cluster in four pointings covering a total FOV of 22x23arcmin2.
Optical observations were obtained between 2005 Nov 4 and 2006 Sep 27.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 144 128 The 128 cluster members identified through
their Gaia proper motion data
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See also:
II/183 : UBVRI Photometric Standards (Landolt 1992)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
VI/128 : Log of CGPS exposures (Taylor+, 2003-)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
J/AJ/101/1408 : Massive stars in Cyg OB2. (Massey+ 1991)
J/A+AS/133/387 : NGC 1817 and NGC 1807 proper motions (Balaguer-Nunnez+ 1998)
J/A+A/374/504 : UBVI photometry of NGC 7654 (Pandey+, 2001)
J/AJ/132/1669 : Wide-field CCD phot. around 9 open clusters (Sharma+, 2006)
J/MNRAS/383/1241 : UBVIc photometry of cluster Berkeley 59 (Pandey+, 2008)
J/A+A/493/959 : UBV(RI)cHalpha photometry in omega Cen (Bellini+, 2009)
J/MNRAS/415/1202 : BVI photometry in W5E HII region (Chauhan+, 2011)
J/MNRAS/411/2530 : UBVRIJHK photometry in NGC1624 (Jose+, 2011)
J/A+A/543/A101 : OB stars in Cygnus OB2 association (Comeron+, 2012)
J/AJ/143/41 : UBVIc CCD photom. of star clusters Tr14 & Tr16 (Hur+, 2012)
J/A+A/543/A87 : PMs and photometry of stars in M55 (Sariya+, 2012)
J/PASJ/64/107 : Multiwavelength study of NGC 281 complex (Sharma+, 2012)
J/MNRAS/432/3445 : YSOs on HII complex Sh2-252 (Jose+, 2013)
J/ApJ/764/172 : UBVRI photometry of stars toward NGC 1931 (Pandey+, 2013)
J/ApJS/208/9 : Intrinsic colors & temperatures of PMS stars (Pecaut+, 2013)
J/MNRAS/430/3350 : Proper motions and membership in NGC 3766 (Yadav+, 2013)
J/A+A/567/A109 : Carina nebula optically identified YSOs (Kumar+, 2014)
J/A+A/584/A59 : Proper motions and membership in NGC 6366 (Sariya+, 2015)
J/ApJ/836/98 : YSOs search in Stock 8 with opt. to IR photom. (Jose+, 2017)
J/AJ/153/134 : PMs and photometry of stars in NGC 3201 (Sariya+, 2017)
J/MNRAS/467/2943 : NGC 7538 region YSOs (Sharma+, 2017)
J/AJ/155/44 : PMS stars in young cluster Berkeley 59 (Panwar+, 2018)
J/A+A/623/A108 : Age of 269 GDR2 open clusters (Bossini+, 2019)
J/ApJ/891/81 : Deep optical & IR photometry of Sh2-305 (Pandey+, 2020)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/128] Running sequence number
5- 14 F10.6 deg RAdeg [305.7/305.95] Right Ascension (J2000)
16- 24 F9.6 deg DEdeg [40.69/40.86] Declination (J2000)
26- 31 F6.3 mag Vmag [7.05/19.98] Apparent V band magnitude
33- 37 F5.3 mag e_Vmag [0.002/10] Uncertainty in Vmag (1)
39- 44 F6.3 mag Bmag [7.97/22.07]? Apparent B band magnitude
46- 50 F5.3 mag e_Bmag [0.002/10]? Uncertainty in Bmag (1)
52- 57 F6.3 mag Imag [5.68/17.57]? Apparent I band magnitude
59- 63 F5.3 mag e_Imag [0.003/10]? Uncertainty in Imag (1)
65- 70 F6.3 mag Rmag [7.12/18.76]? Apparent R band magnitude
72- 76 F5.3 mag e_Rmag [0/10]? Uncertainty in Rmag (1)
78- 83 F6.3 mag Umag [8.02/20.68]? Apparent U band magnitude
85- 89 F5.3 mag e_Umag [0.002/10]? Uncertainty in Umag (1)
91- 95 F5.3 mas plx [0.023/1.72] Gaia DR2 parallax
97-101 F5.3 mas e_plx [0.016/0.34] Uncertainty in plx
103-108 F6.3 mas/yr pmRA [-2.98/-2.05] Gaia DR2 proper motion
along RA *cos(DE)
110-114 F5.3 mas/yr e_pmRA [0.019/0.41] Uncertainty in pmRA
116-121 F6.3 mas/yr pmDE [-5.94/-4.74] Gaia DR2 proper motion along DE
123-127 F5.3 mas/yr e_pmDE [0.026/0.6] Uncertainty in pmDE
129-134 F6.3 mag Gmag [0.048/19.33] Gaia DR2 apparent G band magnitude
136-141 F6.3 mag BP-RP [1.14/]?=99 Gaia DR2 GBP-GRP color index
143-144 I2 % Mm [0/99] Membership probability
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Note (1): An uncertainty of 9.999 indicates the source was saturated and an
accurate uncertainty could not be determined.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 14-Oct-2021