X-RAY EMISSION FROM YOUNG STARS IN THE MASSIVE STAR-FORMING REGION IRAS 20126+4104
- Physics Department, New Mexico Tech., 801 Leroy Pl., Socorro, NM 87801 (United States)
- National Radio Astronomy Observatory, Socorro, NM 87801 (United States)
We present a 40 ks Chandra observation of the IRAS 20126+4104 core region. In the inner 6'' two X-ray sources were detected, which are coincident with the radio jet source I20S and the variable radio source I20Var. No X-ray emission was detected from the nearby massive protostar I20N. The spectra of both detected sources are hard and highly absorbed, with no emission below 3 keV. For I20S, the measured 0.5-8 keV count rate was 4.3 counts ks{sup -1}. The X-ray spectrum was fitted with an absorbed 1T APEC model with an energy of kT =10 keV and an absorbing column of N{sub H} = 1.2 x 10{sup 23} cm{sup -2}. An unabsorbed X-ray luminosity of about 1.4 x 10{sup 32} erg s{sup -1} was estimated. The spectrum shows broad line emission between 6.4 and 6.7 keV, indicative of emission from both neutral and highly ionized iron. The X-ray light curve indicates that I20S is marginally variable; however, no flare emission was observed. The variable radio source I20Var was detected with a count rate of 0.9 counts ks{sup -1} but there was no evidence of X-ray variability. The best-fit spectral model is a 1T APEC model with an absorbing hydrogen column of N{sub H} = 1.1 x 10{sup 23} cm{sup -2} and a plasma energy of kT = 6.0 keV. The unabsorbed X-ray luminosity is about 3 x 10{sup 31} erg s{sup -1}.
- OSTI ID:
- 21582796
- Journal Information:
- Astronomical Journal (New York, N.Y. Online), Vol. 142, Issue 5; Other Information: DOI: 10.1088/0004-6256/142/5/158; ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
Similar Records
AN EXAMINATION OF THE X-RAY SOURCES IN THE GLOBULAR CLUSTER NGC 6652
PROPERTIES AND KEPLERIAN ROTATION OF THE HOT CORE IRAS 20126+4104