Shocked molecular hydrogen towards the Tornado nebula

J. S. Lazendic; M. Wardle; M. G. Burton; F. Yusef-Zadeh; A. J. Green; J. B. Whiteoak

doi:10.1111/j.1365-2966.2004.08199.x

Shocked molecular hydrogen towards the Tornado nebula

J. S. Lazendic^*, M. Wardle, M. G. Burton, F. Yusef-Zadeh, A. J. Green, J. B. Whiteoak

^*Corresponding author for this work

Faculty of Science and Engineering

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

We present near-infrared and millimetre-line observations of the Tornado nebula (G357.7-0.1). We detected 2.12-μm H₂ 1-0 S(1) line emission towards the suspected site of interaction with a molecular cloud revealed by the presence of an OH(1720-MHz) maser. The distribution of the H₂ emission is well correlated with the non-thermal radio continuum emission from the Tornado, and the velocity of the H₂ emission spans over 100 km s^-1, which both imply that the H₂ emission is shock excited. We also detected millimetre lines from ¹²CO and ¹³CO transitions at the velocity of the maser, and mapped the distribution of the molecular cloud in a 2 × 2 arcmin² region around the maser. The peak of the molecular cloud aligns well with an indentation in the radio continuum distribution of the nebula, suggesting that the shock of the nebula is being decelerated at this location, which is consistent with the presence of the OH(1720-MHz) maser and shocked H ₂ emission at that location.

Original language	English
Pages (from-to)	393-400
Number of pages	8
Journal	Monthly Notices of the Royal Astronomical Society
Volume	354
Issue number	2
DOIs	https://doi.org/10.1111/j.1365-2966.2004.08199.x
Publication status	Published - 21 Oct 2004

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title = "Shocked molecular hydrogen towards the Tornado nebula",

abstract = "We present near-infrared and millimetre-line observations of the Tornado nebula (G357.7-0.1). We detected 2.12-μm H2 1-0 S(1) line emission towards the suspected site of interaction with a molecular cloud revealed by the presence of an OH(1720-MHz) maser. The distribution of the H2 emission is well correlated with the non-thermal radio continuum emission from the Tornado, and the velocity of the H2 emission spans over 100 km s-1, which both imply that the H2 emission is shock excited. We also detected millimetre lines from 12CO and 13CO transitions at the velocity of the maser, and mapped the distribution of the molecular cloud in a 2 × 2 arcmin2 region around the maser. The peak of the molecular cloud aligns well with an indentation in the radio continuum distribution of the nebula, suggesting that the shock of the nebula is being decelerated at this location, which is consistent with the presence of the OH(1720-MHz) maser and shocked H 2 emission at that location.",

author = "Lazendic, {J. S.} and M. Wardle and Burton, {M. G.} and F. Yusef-Zadeh and Green, {A. J.} and Whiteoak, {J. B.}",

year = "2004",

month = oct,

day = "21",

doi = "10.1111/j.1365-2966.2004.08199.x",

language = "English",

volume = "354",

pages = "393--400",

journal = "Monthly Notices of the Royal Astronomical Society",

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T1 - Shocked molecular hydrogen towards the Tornado nebula

AU - Lazendic, J. S.

AU - Wardle, M.

AU - Burton, M. G.

AU - Yusef-Zadeh, F.

AU - Green, A. J.

AU - Whiteoak, J. B.

PY - 2004/10/21

Y1 - 2004/10/21

N2 - We present near-infrared and millimetre-line observations of the Tornado nebula (G357.7-0.1). We detected 2.12-μm H2 1-0 S(1) line emission towards the suspected site of interaction with a molecular cloud revealed by the presence of an OH(1720-MHz) maser. The distribution of the H2 emission is well correlated with the non-thermal radio continuum emission from the Tornado, and the velocity of the H2 emission spans over 100 km s-1, which both imply that the H2 emission is shock excited. We also detected millimetre lines from 12CO and 13CO transitions at the velocity of the maser, and mapped the distribution of the molecular cloud in a 2 × 2 arcmin2 region around the maser. The peak of the molecular cloud aligns well with an indentation in the radio continuum distribution of the nebula, suggesting that the shock of the nebula is being decelerated at this location, which is consistent with the presence of the OH(1720-MHz) maser and shocked H 2 emission at that location.

AB - We present near-infrared and millimetre-line observations of the Tornado nebula (G357.7-0.1). We detected 2.12-μm H2 1-0 S(1) line emission towards the suspected site of interaction with a molecular cloud revealed by the presence of an OH(1720-MHz) maser. The distribution of the H2 emission is well correlated with the non-thermal radio continuum emission from the Tornado, and the velocity of the H2 emission spans over 100 km s-1, which both imply that the H2 emission is shock excited. We also detected millimetre lines from 12CO and 13CO transitions at the velocity of the maser, and mapped the distribution of the molecular cloud in a 2 × 2 arcmin2 region around the maser. The peak of the molecular cloud aligns well with an indentation in the radio continuum distribution of the nebula, suggesting that the shock of the nebula is being decelerated at this location, which is consistent with the presence of the OH(1720-MHz) maser and shocked H 2 emission at that location.

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U2 - 10.1111/j.1365-2966.2004.08199.x

DO - 10.1111/j.1365-2966.2004.08199.x

M3 - Article

AN - SCOPUS:7044247796

SN - 0035-8711

VL - 354

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EP - 400

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

Shocked molecular hydrogen towards the Tornado nebula

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