Absolute V-band magnitudes and mass-to-light ratios of Galactic globular clusters

Journal
Date Issued
2020
Author(s)
Baumgardt, H.
•
•
Hilker, M.
DOI
Abstract
We have used HST and ground-based photometry to determine total $V$-band magnitudes and mass-to-light ratios of more than 150 Galactic globular clusters. We do this by summing up the magnitudes of their individual member stars, using color-magnitude information, Gaia DR2 proper motions and radial velocities to distinguish cluster stars from background stars. Our new magnitudes confirm literature estimates for bright clusters with V<8, but can deviate by up to two magnitudes from literature values for fainter clusters. They lead to absolute mass-to-light ratios that are confined to the narrow range 1.4
Volume
37
Uri
Url
Issn Identifier
1448-6083
Ads BibCode
2020PASA...37...46B
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open.access
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