HOPS SED Fits Catalog: 330 Orion Protostars with Model Parameters

The Herschel Orion Protostar Survey (HOPS) provides data for 330 young stellar objects in the Orion molecular clouds. It classifies these objects into protostellar classes and includes bolometric luminosity, temperature, and best-fit model parameters from a grid of 30,400 model SEDs. The catalog was produced by the National Aeronautics and Space Administration and was last updated in March 2026.

Use Cases

• Classifying protostellar evolutionary stages based on mid-IR spectral indices and bolometric temperatures.
• Modeling star formation processes by fitting observed SEDs to a grid of 30,400 protostellar model SEDs.
• Analyzing the distribution of bolometric luminosity and temperature across 330 young stellar objects.
• Studying the population of Class 0, Class I, flat-spectrum, and Class II objects in the Orion molecular clouds.

Strengths

• Focuses on a well-defined sample of 330 young stellar objects with Spitzer and Herschel data.
• Includes classification for 92 Class 0, 125 Class I, 102 flat-spectrum, and 11 Class II objects.
• Derives parameters from a substantial grid of 30,400 model spectral energy distributions.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown for the full 410-object sample; the described analysis is on the subset of 330 objects.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Selected from Spitzer data, with photometry from 2MASS, Spitzer, Herschel, and APEX covering 1.2 - 870 microns.

Time Range

null

Freshness

Last updated 2026-03-13 18:07:34.031178; freshness should be verified.

Geography

Orion molecular clouds