Color-Magnitude Diagram and Luminosity Function of M4 near the Hydrogen-burning Limit
نویسندگان
چکیده
منابع مشابه
Color – Magnitude Diagrams and Luminosity Functions down to the Hydrogen Burning Limit . III . A Preliminary HST Study of NGC 6791 1
Using HST ACS/WFC images, we derive the color–magnitude diagram of the old, metal-rich open cluster NGC 6791 to nearly 29th magnitude in V , which is the neighborhood of the hydrogen-burning limit. Comparison with isochrones leads to a discussion of the distance modulus, the reddening, and the age of the cluster. By making a statistical correction for field stars we derive a preliminary luminos...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2001
ISSN: 0004-637X
DOI: 10.1086/324174