Molecular Hydrogen Emission from the Photodissociation Region in Hubble 12

A. Chrysostomou; P.W.J.L. Brand; S.K.R. Howat; M. Burton

Molecular Hydrogen Emission from the Photodissociation Region in Hubble 12

A. Chrysostomou, P.W.J.L. Brand, S.K.R. Howat, M. Burton

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Abstract

Infrared spectra of molecular hydrogen (H2) line emission, from the photodissociation region in the planetary nebula Hubble 12, are presented. The spectra range between 0.7 and 2.5 um. Approximately 75 H2 lines were measured with over 100 lines actually detected. The ortho/para ratio for H2 was measured and it is shown that there is a decreasing trend in this ratio with energy level. This is qualitatively interpreted as the radiative excitation of 'fresh' molecules from the molecular cloud by a still evolving and young photodissociation region.

Original language	English
Title of host publication	In: Star Formation with the Infrared Space Observatory - ASP Conf Series 132
Publisher	Astronomical Society of the Pacific
Pages	330-333
ISBN (Print)	978-1-58381-468-0, 1-886733-52-X
Publication status	Published - 1998

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@inproceedings{c923c410ed6c4e71a5deb38e57180992,

title = "Molecular Hydrogen Emission from the Photodissociation Region in Hubble 12",

abstract = "Infrared spectra of molecular hydrogen (H2) line emission, from the photodissociation region in the planetary nebula Hubble 12, are presented. The spectra range between 0.7 and 2.5 um. Approximately 75 H2 lines were measured with over 100 lines actually detected. The ortho/para ratio for H2 was measured and it is shown that there is a decreasing trend in this ratio with energy level. This is qualitatively interpreted as the radiative excitation of 'fresh' molecules from the molecular cloud by a still evolving and young photodissociation region.",

author = "A. Chrysostomou and P.W.J.L. Brand and S.K.R. Howat and M. Burton",

note = "Original paper can be found at: http://astrosociety.org/pubs/cs/113-155.html Copyright ASP",

year = "1998",

language = "English",

isbn = "978-1-58381-468-0",

pages = "330--333",

booktitle = "In: Star Formation with the Infrared Space Observatory - ASP Conf Series 132",

publisher = "Astronomical Society of the Pacific",

address = "United States",

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TY - GEN

T1 - Molecular Hydrogen Emission from the Photodissociation Region in Hubble 12

AU - Chrysostomou, A.

AU - Brand, P.W.J.L.

AU - Howat, S.K.R.

AU - Burton, M.

N1 - Original paper can be found at: http://astrosociety.org/pubs/cs/113-155.html Copyright ASP

PY - 1998

Y1 - 1998

N2 - Infrared spectra of molecular hydrogen (H2) line emission, from the photodissociation region in the planetary nebula Hubble 12, are presented. The spectra range between 0.7 and 2.5 um. Approximately 75 H2 lines were measured with over 100 lines actually detected. The ortho/para ratio for H2 was measured and it is shown that there is a decreasing trend in this ratio with energy level. This is qualitatively interpreted as the radiative excitation of 'fresh' molecules from the molecular cloud by a still evolving and young photodissociation region.

AB - Infrared spectra of molecular hydrogen (H2) line emission, from the photodissociation region in the planetary nebula Hubble 12, are presented. The spectra range between 0.7 and 2.5 um. Approximately 75 H2 lines were measured with over 100 lines actually detected. The ortho/para ratio for H2 was measured and it is shown that there is a decreasing trend in this ratio with energy level. This is qualitatively interpreted as the radiative excitation of 'fresh' molecules from the molecular cloud by a still evolving and young photodissociation region.

M3 - Conference contribution

SN - 978-1-58381-468-0

SN - 1-886733-52-X

SP - 330

EP - 333

BT - In: Star Formation with the Infrared Space Observatory - ASP Conf Series 132

PB - Astronomical Society of the Pacific

ER -

Molecular Hydrogen Emission from the Photodissociation Region in Hubble 12

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