SIMBAD references

2009ApJ...693.1803S - Astrophys. J., 693, 1803-1813 (2009/March-2)

XMM observations of two quadrupolar outflows.


Abstract (from CDS):

X-ray images of two small dark clouds, L1455 and L723, have been obtained with the EPIC cameras on board the XMM-Newton telescope. Both regions contain multiple independent but overlapping bipolar flows in high-velocity CO, a collection of Herbig-Haro objects, and a number of filaments and knots of H2emission. The field of view in each cloud was centered on the confluence of the nearly orthogonal CO flows. More than three dozen compact X-ray sources were detected. However, the Class 0/I protostars thought to be the driving sources of the flows in both clouds were not detected. Strong emission was observed from RNO 15, an optically visible, nebulous T Tauri star in the dense core of L1455. A thermal plasma model for the X-ray spectrum of RNO 15 gave a luminosity of LX∼ 1031.2 erg/s. The heavily reddened Class II star L1455 IRS 5 in the same region was detected as a weak X-ray source. No emission was detected from IRS 1 or IRS 4, which have been suggested as the launch sites for separate outflows in L1455. X-ray emission was observed from IRAS 19156+1906 in L723. The thermal radio source VLA 2, which is offset ∼10'' east of the IRAS position and is considered the most likely energy source for the strong east-west flow in L723, was not detected. The source of the more narrowly collimated north-south flow in L723 is unknown but may be an embedded infrared object at the X-ray and IRAS position.

Abstract Copyright:

Journal keyword(s): ISM: Herbig-Haro objects - ISM: individual (L1455, L723) - stars: formation - stars: pre-main sequence - X-rays: stars

Nomenclature: Table 2: [S2009] L1455 XMM NN (Nos 1-21). Table 3: [S2009] L723 XMM NN (Nos 1-18). Table 4: [S2009] L1455 Object NN (Nos 1-16), [S2009] L723 Object NN (Nos 1-13).

Status at CDS:  

Simbad objects: 68

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