Study of the young open cluster NGC 1960

DOI

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 (P1d). 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.

Cone search capability for table J/MNRAS/492/3602/table4 (Photometric catalogue of 3962 stars detected in the field of cluster NGC 1960)

Cone search capability for table J/MNRAS/492/3602/table5 (The photometric parameters given for 262 cluster members)

Cone search capability for table J/MNRAS/492/3602/table10 (The details of the 72 periodic variables found in the cluster NGC 1960)

Cone search capability for table J/MNRAS/492/3602/table11 (The parameters of four irregular variable stars identified in the cluster NGC 1960)

Identifier
DOI http://doi.org/10.26093/cds/vizier.74923602
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/492/3602
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/492/3602
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/492/3602
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/492/3602
Provenance
Creator Joshi Y.C.; Maurya J.; John A.A.; Panchal A.; Joshi S.; Kumar B.
Publisher CDS
Publication Year 2023
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy