UBVI charge-coupled device photometry of two old open clusters NGC 1798 and 2192

Details UBVI charge-coupled device photometry of two old open clusters NGC 1798 and 2192 UBVI charge-coupled device photometry of two old open clusters NGC 1798 and 2192

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.304..883p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 304, Issue 4, pp. 883-892.

Astronomy and Astrophysics

Astronomy

7

Hertzsprung-Russell (Hr) Diagram, Stars: Luminosity Function, Mass Function, Open Clusters And Associations: General, Open Clusters And Associations: Individual: Ngc 1798, Open Clusters And Associations: Individual: Ngc 2192

Scientific paper

We present UBVI charge-coupled device (CCD) photometry of two open clusters NGC 1798 and 2192, which have been little studied before. Colour-magnitude diagrams of these clusters show several features that are typical of old open clusters: a well-defined main sequence, a red giant clump, and a small number of red giants. The main sequence of NGC 1798 shows a distinct gap at V ~ 16.2 mag. From the surface number density distribution we have measured the size of the clusters, obtaining 8.3 arcmin (= 10.2 pc) for NGC 1798 and 7.3 arcmin (= 7.5 pc) for NGC 2192. Then we have determined the reddening, metallicity, and distance of these clusters using the colour-colour diagrams and colour-magnitude diagrams: E(B-V)=0.51 +/- 0.04, [Fe/H] = -0.47 +/- 0.15 dex and (m-M)_0=13.1 +/- 0.2 (d=4.2 +/- 0.3 kpc) for NGC 1798, and E(B-V)=0.20 +/- 0.03, [Fe/H] = -0.31 +/- 0.15 dex and (m-M)_0=12.7 +/- 0.2 (d=3.5 +/- 0.3 kpc) for NGC 2192. The ages of these clusters have been estimated using the morphological age indicators and the isochrone fitting with the Padova isochrones: 1.4 +/- 0.2 Gyr for NGC 1798 and 1.1 +/- 0.1 Gyr for NGC 2192. The luminosity functions of the main-sequence stars in these clusters are found to be similar to other old open clusters. The metallicity and distance of these clusters are consistent with the relation between the metallicity and the Galactocentric distance of other old open clusters.

Affiliated with

Also associated with

No associations

Rating

UBVI charge-coupled device photometry of two old open clusters NGC 1798 and 2192 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with UBVI charge-coupled device photometry of two old open clusters NGC 1798 and 2192, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UBVI charge-coupled device photometry of two old open clusters NGC 1798 and 2192 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-891690