X-rays from HH 210 in the Orion nebula

N. Grosso, E. D. Feigelson, K. V. Getman, J. H. Kastner, J. Bally, M. J. McCaughrean

Research output: Contribution to journalArticle

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Abstract

We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH 210. HH 210 is located at the tip of the NNE finger of the emission line system bursting out of the BN-KL complex, northwest of the Trapezium cluster in the OMC-1 molecular cloud. Using a recent Hα image obtained with the ACS imager on board HST, and taking into account the known proper motions of HH210 emission knots, we show that the position of the brightest X-ray source, COUP 703, coincides with the emission knot 154-040a of HH 210, which is the emission knot of HH 210 having the highest tangential velocity (425 km s-1). The second X-ray source, COUP 704, is located on the complicated emission tail of HH210 close to an emission line filament and has no obvious optical/infrared counterpart. Spectral fitting indicates for both sources a plasma temperature of ∼0.8 MK and absorption-corrected X-ray luminosities of about 1030 erg s-1 (0.5-2.0 keV). These X-ray sources are well explained by a model invoking a fast-moving, radiative bow shock in a neutral medium with a density of ∼ 12 000 cm-3. The X-ray detection of COUP 704 therefore reveals, in the complicated HH 210 region, an energetic shock not yet identified at other wavelengths.

Original languageEnglish (US)
Pages (from-to)L29-L32
JournalAstronomy and Astrophysics
Volume448
Issue number2
DOIs
StatePublished - Mar 1 2006

Fingerprint

Orion nebula
x rays
shock
Herbig-Haro objects
plasma temperature
proper motion
bows
molecular clouds
erg
filaments
energetics
luminosity
wavelength
plasma
project
wavelengths

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Grosso, N. ; Feigelson, E. D. ; Getman, K. V. ; Kastner, J. H. ; Bally, J. ; McCaughrean, M. J. / X-rays from HH 210 in the Orion nebula. In: Astronomy and Astrophysics. 2006 ; Vol. 448, No. 2. pp. L29-L32.
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Grosso, N, Feigelson, ED, Getman, KV, Kastner, JH, Bally, J & McCaughrean, MJ 2006, 'X-rays from HH 210 in the Orion nebula', Astronomy and Astrophysics, vol. 448, no. 2, pp. L29-L32. https://doi.org/10.1051/0004-6361:200600004

X-rays from HH 210 in the Orion nebula. / Grosso, N.; Feigelson, E. D.; Getman, K. V.; Kastner, J. H.; Bally, J.; McCaughrean, M. J.

In: Astronomy and Astrophysics, Vol. 448, No. 2, 01.03.2006, p. L29-L32.

Research output: Contribution to journalArticle

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AU - Grosso, N.

AU - Feigelson, E. D.

AU - Getman, K. V.

AU - Kastner, J. H.

AU - Bally, J.

AU - McCaughrean, M. J.

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N2 - We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH 210. HH 210 is located at the tip of the NNE finger of the emission line system bursting out of the BN-KL complex, northwest of the Trapezium cluster in the OMC-1 molecular cloud. Using a recent Hα image obtained with the ACS imager on board HST, and taking into account the known proper motions of HH210 emission knots, we show that the position of the brightest X-ray source, COUP 703, coincides with the emission knot 154-040a of HH 210, which is the emission knot of HH 210 having the highest tangential velocity (425 km s-1). The second X-ray source, COUP 704, is located on the complicated emission tail of HH210 close to an emission line filament and has no obvious optical/infrared counterpart. Spectral fitting indicates for both sources a plasma temperature of ∼0.8 MK and absorption-corrected X-ray luminosities of about 1030 erg s-1 (0.5-2.0 keV). These X-ray sources are well explained by a model invoking a fast-moving, radiative bow shock in a neutral medium with a density of ∼ 12 000 cm-3. The X-ray detection of COUP 704 therefore reveals, in the complicated HH 210 region, an energetic shock not yet identified at other wavelengths.

AB - We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH 210. HH 210 is located at the tip of the NNE finger of the emission line system bursting out of the BN-KL complex, northwest of the Trapezium cluster in the OMC-1 molecular cloud. Using a recent Hα image obtained with the ACS imager on board HST, and taking into account the known proper motions of HH210 emission knots, we show that the position of the brightest X-ray source, COUP 703, coincides with the emission knot 154-040a of HH 210, which is the emission knot of HH 210 having the highest tangential velocity (425 km s-1). The second X-ray source, COUP 704, is located on the complicated emission tail of HH210 close to an emission line filament and has no obvious optical/infrared counterpart. Spectral fitting indicates for both sources a plasma temperature of ∼0.8 MK and absorption-corrected X-ray luminosities of about 1030 erg s-1 (0.5-2.0 keV). These X-ray sources are well explained by a model invoking a fast-moving, radiative bow shock in a neutral medium with a density of ∼ 12 000 cm-3. The X-ray detection of COUP 704 therefore reveals, in the complicated HH 210 region, an energetic shock not yet identified at other wavelengths.

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