An X-Ray and Infrared Survey of the Lynds 1228 Cloud Core

April 2014 • 2014AJ....147...88S

Authors • Skinner, Stephen L. • Rebull, Luisa • Güdel, Manuel

Abstract • The nearby Lynds 1228 (L1228) dark cloud at a distance of ~200 pc is known to harbor several young stars including the driving sources of the giant HH 199 and HH 200 Herbig-Haro (HH) outflows. L1228 has previously been studied at optical, infrared, and radio wavelengths but not in X-rays. We present results of a sensitive 37 ks Chandra ACIS-I X-ray observation of the L1228 core region. Chandra detected 60 X-ray sources, most of which are faint (<40 counts) and non-variable. Infrared counterparts were identified for 53 of the 60 X-ray sources using archival data from the Two Micron All-Sky Survey, the Spitzer Space Telescope, and the Wide-field Infrared Survey Explorer. Object classes were assigned using mid-IR colors for those objects with complete photometry, most of which were found to have colors consistent with extragalactic background sources. Seven young stellar object candidates were identified including the class I protostar HH 200-IRS which was detected as a faint hard X-ray source. No X-ray emission was detected from the luminous protostar HH 199-IRS. We summarize the X-ray and infrared properties of the detected sources and provide IR spectral energy distribution modeling of high-interest objects including the protostars driving the HH outflows.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=2014AJ....147...88S
• PDF https://iopscience.iop.org/article/10.1088/0004-6256/147/4/88/pdf
• PDF https://stacks.iop.org/1538-3881/147/88/pdf
• PREPRINT http://arxiv.org/abs/1401.3285
• DATA https://cda.harvard.edu/chaser?obsid=7425
• DATA https://irsa.ipac.caltech.edu/bibdata/2014/S/2014AJ....147...88S.html
• ELECTR https://doi.org/10.1088%2F0004-6256%2F147%2F4%2F88