SIMBAD references

2003A&A...410..951P - Astronomy and Astrophysics, volume 410, 951-959 (2003/11-2)

XMM-Newton study of the Serpens star-forming region.


Abstract (from CDS):

We analyze a XMM-Newton X-ray observation of the Serpens dark cloud with a total MOS-equivalent exposure time of 57ksec. We find 45 individual X-ray sources. None of the class 0 protostars, only one of the class I protostars, and two of the flat-spectrum objects in the region are detected in X-rays. The optically invisible flat-spectrum source EC 95, a very young intermediate mass object, is the strongest X-ray source in the Serpens cloud. The analysis of its X-ray spectrum shows that the hydrogen column density towards EC 95 is considerably lower than expected from the extinction determined from near-IR spectroscopy and photometry. Possible reasons for this inconsistency are discussed.

Abstract Copyright:

Journal keyword(s): open clusters and associations: individual: Serpens dark cloud - stars: formation - stars: coronae - stars: low-mass, brown dwarfs - stars: pre-main sequence - X-rays: stars

Nomenclature: Table 1: [P2003] JHHMMSS.s+DDMMSS N=45.

CDS comments: Table 1 : STGM 8 = STGM 182735.3+010959.

Simbad objects: 64

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