An X-Ray and Infrared Survey of the Lynds 1228 Cloud Core
- Autor(en)
- Stephen Lee Skinner, L. M. Rebull, Manuel Güdel
- Abstrakt
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.
- Organisation(en)
- Institut für Astrophysik
- Externe Organisation(en)
- University of Colorado, Boulder, California Institute of Technology (Caltech)
- Journal
- The Astronomical Journal
- Band
- 147
- Anzahl der Seiten
- 15
- ISSN
- 0004-6256
- DOI
- https://doi.org/10.1088/0004-6256/147/4/88
- Publikationsdatum
- 04-2014
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103003 Astronomie, 103004 Astrophysik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Astronomy and Astrophysics, Space and Planetary Science
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/b20f71ac-b2a8-45da-8f74-955084c8c9aa