The HST/ACS Photometric Catalog of the Orion Nebula Cluster

Details The HST/ACS Photometric Catalog of the Orion Nebula Cluster The HST/ACS Photometric Catalog of the Orion Nebula Cluster

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.8923r&link_type=abstract

American Astronomical Society, AAS Meeting #211, #89.23; Bulletin of the American Astronomical Society, Vol. 39, p.881

Astronomy and Astrophysics

Astronomy

Scientific paper

We show a preview of the HST/ACS photometric catalog of the Orion Nebula Cluster (ONC). The catalog contains the photometric data gathered with the Wide Field Channel of ACS (ACS/WFC) over an area approximately 1/6 square degree centered on the Trapezium. The filters used were four broad-band [F435W (B), F555W (V), F775W (I), F850LP (z)] plus the narrow-band F658N(Hα). Thanks to the unparalleled sensitivity (to 23-24 mag), dynamic range ( 12 mag), and spatial resolution (50 milliarcsec, corresponding to 20 AU at the distance of ONC) of ACS/WFC, the catalog provides the deepest, most accurate and unbiased dataset yet of stellar optical photometry for pre-main-sequence objects in this critical star-forming region. We illustrate how these data can be used to derive the properties of the ONC members and of the cluster in general.

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