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- W1997399018 abstract "We have studied X-rays from the double cluster h and χ Per with an 11 ks ROSAT position-sensitive proportional counter (PSPC) observation. Emission is concentrated toward the two cluster centers. Whether the emission is diffuse emission or from a population of unresolved faint sources is uncertain because the resolution is poor at the distance of the clusters (2.4 kpc). Twenty-three sources were found with an X-ray luminosity of log L = 31.5 ergs s-1 or greater. These sources were found in the cluster nuclei, between the clusters, and in a halo around the cluster pair. The ROSAT PSPC error circle is too large for the identification of X-ray sources with individual optical objects. However, because of a lack of correlation between X-ray sources and B stars, we conclude that the X-rays are produced by late spectral type pre-main-sequence stars. The X-ray sources are brighter than all but the very brightest sources in the younger Orion Nebula cluster, which makes them important in tracing the final stages approaching the main sequence." @default.
- W1997399018 created "2016-06-24" @default.
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- W1997399018 date "2000-08-01" @default.
- W1997399018 modified "2023-09-23" @default.
- W1997399018 title "Settling onto the Main Sequence:ROSATObservations ofh and χ Persei" @default.
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- W1997399018 doi "https://doi.org/10.1086/309162" @default.
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