X-rays from Cepheus A East and West

Abstract

We report the discovery of X-rays from both components of Cepheus A, East and West, with the XMM-Newton Observatory. HH 168 joins the ranks of other energetic Herbig Haro objects that are sources of T~10^6 K X-ray emission. The HH 168 effective temperature is T = 5.8 (+3.5,-2.3) x 10^6 K and its unabsorbed luminosity is 1.1 x 10^29 erg s^-1, making it hotter and less luminous than other representatives of its class. We also detect prominent X-ray emission from the complex of compact radio sources believed to be the power sources for Cep A. We call this source HWX and it is distinguished by its hard X-ray spectrum, T = 1.2 (+1.2,-0.5) x 10^8 K, and complex spatial distribution. It may arise from one or more protostars associated with the radio complex, the outflows, or a combination of the two. We detect 102 X-rays sources; many presumed to be pre-main sequence stars based upon the reddening of their optical/IR counterparts.

15 pages, 8 figures, data table not included because of size limits

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• The USNO-B Catalog
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• X-ray emitting young stars in the Orion Nebula
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• The X-ray Luminosities of HH Objects
• Discovery of X rays from Class 0 protostar candidates in OMC-3
• X-rays from HH 80, HH 81, and the Central Region
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Cited by in corpus (13)

• Discovery of a bipolar X-ray jet from the T Tauri star DG Tau
• X-rays from jet-driving protostars and T Tauri stars
• A Pulsed, Precessing Jet in Cepheus A
• X-rays from protostellar jets: emission from continuous flows
• X-rays from the Power Sources of the Cepheus A Star-Forming Region
• Formation of X-ray emitting stationary shocks in magnetized protostellar jets
• Structure of X-ray emitting jets close to the launching site: from embedded to disk-bearing sources
• The Chandra X-ray view of the power sources in Cepheus A
• GGD 37: An Extreme Protostellar Outflow
• Chandra observation of Cepheus A: The diffuse emission of HH 168 resolved
• Pre main sequence: Accretion & Outflows
• A Survey for Ground-State OH Masers Toward a Sample of Herbig-Haro Objects
• Accretion and Outflow-Related X-Rays in T Tauri Stars