CCD Photometry of M15
We present CCD observations of the galactic globular cluster M15, in the B and V filters. The cluster was reasonably covered, except in its northern region where our observations present a gap. We obtained a Hertzsprung-Russell (HR) diagram for each region observed, and later we produced a combined HR diagram containing more than 3000 stars. We generate a clean Colour Magnitude Diagram (CMD) and a Super Fiducial Line (SFL). Application of several methods and isochrone fitting leads us to obtain values for the metallicity [Fe/H]M15~ -2.16 ± 0.10, the reddening E(B - V)M15~ 0.11 ± 0.03, and a distance modulus of [(m-M)0]M15 ~ 15.03.
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Digital revista |
| Language: | English |
| Published: |
Universidad Nacional Autónoma de México, Instituto de Astronomía
2010
|
| Online Access: | http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0185-11012010000100001 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | We present CCD observations of the galactic globular cluster M15, in the B and V filters. The cluster was reasonably covered, except in its northern region where our observations present a gap. We obtained a Hertzsprung-Russell (HR) diagram for each region observed, and later we produced a combined HR diagram containing more than 3000 stars. We generate a clean Colour Magnitude Diagram (CMD) and a Super Fiducial Line (SFL). Application of several methods and isochrone fitting leads us to obtain values for the metallicity [Fe/H]M15~ -2.16 ± 0.10, the reddening E(B - V)M15~ 0.11 ± 0.03, and a distance modulus of [(m-M)0]M15 ~ 15.03. |
|---|