X-Ray Emission from Young Stars in the Massive Star Forming Region IRAS 20126+4104

Abstract

We present a $40$ks Chandra observation of the IRAS20126+4104 core region. In the inner $6^{\prime \prime }$ 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 $4.3$ctsks${}^{-1}$. The X-ray spectrum was fit with an absorbed 1T APEC model with an energy of kT$=10$keV and an absorbing column of N${}_H=1.2\times 10^{23}$cm${}^{-2}$. An unabsorbed X-ray luminosity of about $1.4\times 10^{32}$ergs${}^{-1}$ 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 lightcurve indicates that I20S is marginally variable; however, no flare emission was observed. The variable radio source I20Var was detected with a count rate of $0.9$ctsks${}^{-1}$ 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${}_H=1.1\times 10^{23}$cm${}^{-2}$ and a plasma energy of kT = 6.0keV. The unabsorbed X-ray luminosity is about $3\times 10^{31}$ergs${}^{-1}$.

17pages, 4 figures to appear in Astronomical Journal

References in corpus (8)

• Discovery of a bipolar X-ray jet from the T Tauri star DG Tau
• X-ray emission from classical T Tauri stars: Accretion shocks and coronae?
• The Integrated Diffuse X-ray Emission of the Carina Nebula Compared to Other Massive Star-forming Regions
• The Masers Towards IRAS 20126+4104
• X-ray Variability in the Young Massive Triple theta2 Ori A
• The Complex Mid-Infrared Structure at the Heart of IRAS 20126+4104
• Chandra and Spitzer Imaging of the Infrared Cluster in NGC 2071
• Hard X-rays and Fluorescent Iron Emission from the Embedded Infrared Cluster in NGC 2071

Cited by in corpus (7)

• The Massive Star-forming Regions Omnibus X-ray Catalog
• Evolution of Stellar Feedback in HII Regions
• A Hot and Massive Accretion Disk around the High-Mass Protostar IRAS 20126+4104
• The Massive Star-Forming Regions Omnibus X-Ray Catalog, Second Installment
• A Massive Star is Born: How Feedback from Stellar Winds, Radiation Pressure, and Collimated Outflows Limits Accretion onto Massive Stars
• The SOUL view of IRAS20126+4104. Kinematics and variability of the H${}_2$ jet from a massive protostar
• X-ray and Radio Observations of the Massive Star Forming Region IRAS 20126+4104