Study of the young open cluster NGC 1960 Virtual Observatory Resource

Authors
  1. Joshi Y.C.
  2. Maurya J.
  3. John A.A.
  4. Panchal A.
  5. Joshi S.
  6. Kumar B.
  7. Published by
    CDS
Abstract

We present a comprehensive photometric analysis of a young open cluster NGC 1960 (=M36) along with the long-term variability study of this cluster. Based on the kinematic data of Gaia DR2, the membership probabilities of 3871 stars are ascertained in the cluster field among which 262 stars are found to be cluster members. Considering the kinematic and trigonometric measurements of the cluster members, we estimate a mean cluster parallax of 0.86+/-0.05mas and mean proper motions of {mu}RA=-0.143+/-0.008mas/yr and {mu}Dec.=-3.395+/-0.008mas/yr. We obtain basic parameters of the cluster such as E(B-V)=0.24+/-0.02 mag, log(Age/yr)=7.44+/-0.02, and d=1.17+/-0.06kpc. The mass function slope in the cluster for the stars in the mass range of 0.72-7.32M_{sun}_ is found to be {gamma}=-1.26+/-0.19. We find that mass segregation is still taking place in the cluster which is yet to be dynamically relaxed. This work also presents first high-precision variability survey in the central 13arcminx13arcmin region of the cluster. The V-band photometric data accumulated on 43 nights over a period of more than 3yr reveals 76 variable stars among which 72 are periodic variables. Among them, 59 are short period (P<1d) and 13 are long period (P>1d). The variable stars have V magnitudes ranging between 9.1 to 19.4mag and periods between 41min and 10.74d. On the basis of their locations in the H-R diagram, periods, and characteristic light curves, 20 periodic variables belong to the cluster are classified as 2 {delta}-Scuti, 3 {gamma}-Dor, 2 slowly pulsating B stars, 5 rotational variables, 2 non-pulsating B stars, and 6 as miscellaneous variables.

Keywords
  1. open-star-clusters
  2. variable-stars
  3. visible-astronomy
  4. trigonometric-parallax
  5. proper-motions
  6. effective-temperature
  7. stellar-masses
  8. infrared-photometry
  9. broad-band-photometry
Bibliographic source Bibcode
2020MNRAS.492.3602J
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/492/3602
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/492/3602
Document Object Identifer DOI
doi:10.26093/cds/vizier.74923602

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/492/3602
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/492/3602
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/492/3602
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3602/table4?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3602/table4?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3602/table4?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3602/table5?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3602/table5?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3602/table5?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3602/table10?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3602/table10?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3602/table10?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/3602/table11?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/3602/table11?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/3602/table11?

History

2023-06-12T15:33:48Z
Resource record created
2023-06-12T15:33:48Z
Created
2024-08-20T20:15:43Z
Updated

Contact

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CDS support team
Postal Address
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E-Mail
cds-question@unistra.fr