Orion Nebula Cluster: X-ray and Optical Properties of 696 Stars

A catalog of 696 low-extinction stars in the Orion Nebula Cluster, compiled from a 63 ks Chandra HRC-I X-ray observation and 17 multi-wavelength source catalogs. The table includes stellar parameters like mass, age, rotational period, X-ray luminosity (L_X), and the ratio L_X/L_bol. NASA HEASARC created this table in March 2007 based on data from the reference paper.

Use Cases

• Study correlations between X-ray activity and stellar mass based on the provided L_X and L_X/L_bol values.
• Analyze the dip in X-ray detection rates for stars between 2 and 10 solar masses mentioned in the description.
• Model stellar evolution in young clusters using the provided mass, age, and rotational period data.
• Cross-match multi-wavelength object catalogs for the Orion Nebula region using the compiled reference list.

Strengths

• Integrates data from 17 different multi-wavelength catalogs, creating a reference list of nearly 2900 objects.
• Focuses on a well-characterized optical sample of 696 stars with low visual extinction (A_V < 3.0).
• Provides key derived astrophysical parameters like X-ray luminosity and the ratio L_X/L_bol for analysis.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown for the full multi-wavelength catalog, which may limit suitability assessment.
• Data is based on a 2007 creation date; freshness should be verified against newer observations.

Provenance

Source

NASA HEASARC, based on CDS table J/ApJ/582/382 from the reference paper.

Collection Method

Compiled from a 63 ks Chandra HRC-I X-ray observation and 17 published catalogs from recent literature.

Freshness

Last updated 2026-03-13 18:40:06.487660; freshness should be verified.

Geography

Orion Nebula Cluster region within a 30' x 30' field of view.