The Large Megallanic Cloud Cluster NGC 1835: Photometry of the RR Lyrae Stars
Abstract
Photometry is presented for the RR Lyrae variables in the Large Magellanic Cloud (LMC) cluster NGC 1835. Sixteen new variables have been discovered. Due to the extreme crowding of LMC field stars, the scatter of the light curves and mean magnitudes is greater than that found for other LMC clusters studied under similar observational conditions. The derived parameters of the light curves yield E( B - V) = 0.13 and [Fe/H] = - 1.8, consistent with previous measurements. The complete sample of RR Lyraes has mean magnitudes <V> = 19.38, <B> = 19.70. If a distance modulus of 18.5 mag for the LMC is assumed, then in the mean the NGC 1835 RR Lyraes have <M_V_> = 0.48, almost identical to the average found by the same procedure for six other LMC clusters.
- Publication:
-
The Astronomical Journal
- Pub Date:
- February 1993
- DOI:
- Bibcode:
- 1993AJ....105..527W
- Keywords:
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- Astronomical Photometry;
- Light Curve;
- Lyra Constellation;
- Magellanic Clouds;
- Star Clusters;
- Variable Stars;
- Charge Coupled Devices;
- Globular Clusters;
- Photographic Measurement;
- Photographic Plates;
- Stellar Magnitude;
- Astrophysics;
- MAGELLANICS CLOUDS;
- STARS: VARIABLES: RR LYRAE