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The State-of-the-art HST Astro-photometric Analysis of the Core of ω Centauri. I. the Catalog

Astrophysical Journal, ISSN: 1538-4357, Vol: 842, Issue: 1
2017
  • 98
    Citations
  • 0
    Usage
  • 19
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    98
    • Citation Indexes
      98
  • Captures
    19
  • Mentions
    1
    • News Mentions
      1
      • 1

Most Recent News

Fast-moving stars around an intermediate-mass black hole in ω Centauri

Nature, Published online: 10 July 2024; doi:10.1038/s41586-024-07511-z Observations of seven fast-moving stars in the central 3 arcsec (0.08  pc) of ω Centauri indicate an intermediate-mass black hole in ω Centauri.

Article Description

We have constructed the most comprehensive catalog of photometry and proper motions ever assembled for a globular cluster (GC). The core of ωCen has been imaged over 650 times through WFC3's UVIS and IR channels for the purpose of detector calibration. There exist from 4 to over 60 exposures through each of 26 filters stretching continuously from F225W in the UV to F160W in the infrared. Furthermore, the 11 yr baseline between these data and a 2002 ACS survey has allowed us to more than double the proper-motion accuracy and triple the number of well-measured stars compared to our previous groundbreaking effort. This totally unprecedented complete spectral coverage of over 470,000 stars within the cluster's core, from the tip of the red giant branch down to the white dwarfs, provides the best astro-photometric observational database yet to understand the multiple-population phenomenon in any GC. In this first paper of the series, we describe in detail the data-reduction processes and deliver the astro-photometric catalog to the astronomical community.

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