A dense gas survey of the gamma-ray sources HESS J1731-347 and HESS J1729-345

Nigel Maxted; Gavin Rowell; Phoebe de Wilt; Michael Burton; Matthieu Renaud; Yasuo Fukui; Jarryd Hawkes; Rebecca Blackwell; Fabien Voisin; Vicki Lowe; Felix Aharonian

A dense gas survey of the gamma-ray sources HESS J1731-347 and HESS J1729-345

Nigel Maxted, Gavin Rowell, Phoebe de Wilt, Michael Burton, Matthieu Renaud, Yasuo Fukui, Jarryd Hawkes, Rebecca Blackwell, Fabien Voisin, Vicki Lowe, Felix Aharonian

Western Sydney University

Research output: Chapter in Book / Conference Paper › Conference Paper › peer-review

Abstract

![CDATA[The results of Mopra molecular spectral line observations towards the supernova remnant HESS J1731−347 (G353.6−0.7) and the unidentified gamma-ray source HESS J1729−345 are presented. Dense molecular gas in three different velocity-bands (corresponding to three Galactic arms) are investigated using the CS(1-0) line. The CS-traced component provides information about the dense target material in a hadronic scenario for gamma-ray production (cosmic-rays interacting with gas) and an understanding of the dynamics. Furthermore, the effects of cosmic ray diffusion into dense gas may alter the gamma-ray spectrum to cause a flattening of spectra towards such regions. Dense molecular gas mass at a level of ∼105 M⊙ was revealed in this survey, with mass of the order of ∼103 M⊙ towards HESS J1729−345 in each coincident Galactic arm, but no significant detection of dense molecular gas towards HESS J1731−347 at the currently-preferred distance of ∼5.2-6.2 kpc was discovered.]]

Original language	English
Title of host publication	Proceedings of Science. Volume 2014: Proceedings Cosmic Rays and the InterStellar Medium, CRISM 2014, Montpellier, France, 24-27 June 2014
Publisher	Sissa Medialab
Number of pages	6
Publication status	Published - 2014
Event	Cosmic Rays and the InterStellar Medium - Duration: 1 Jan 2014 → …

Conference

Conference	Cosmic Rays and the InterStellar Medium
Period	1/01/14 → …

Keywords

cosmic rays
gamma rays
gases
supernova remnants
surveys

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Maxted, N., Rowell, G., Wilt, P. D., Burton, M., Renaud, M., Fukui, Y., Hawkes, J., Blackwell, R., Voisin, F., Lowe, V., & Aharonian, F. (2014). A dense gas survey of the gamma-ray sources HESS J1731-347 and HESS J1729-345. In Proceedings of Science. Volume 2014: Proceedings Cosmic Rays and the InterStellar Medium, CRISM 2014, Montpellier, France, 24-27 June 2014 Sissa Medialab.

@inproceedings{9c974ca67cf549668a3766e5b7c53461,

title = "A dense gas survey of the gamma-ray sources HESS J1731-347 and HESS J1729-345",

abstract = "![CDATA[The results of Mopra molecular spectral line observations towards the supernova remnant HESS J1731−347 (G353.6−0.7) and the unidentified gamma-ray source HESS J1729−345 are presented. Dense molecular gas in three different velocity-bands (corresponding to three Galactic arms) are investigated using the CS(1-0) line. The CS-traced component provides information about the dense target material in a hadronic scenario for gamma-ray production (cosmic-rays interacting with gas) and an understanding of the dynamics. Furthermore, the effects of cosmic ray diffusion into dense gas may alter the gamma-ray spectrum to cause a flattening of spectra towards such regions. Dense molecular gas mass at a level of ∼105 M⊙ was revealed in this survey, with mass of the order of ∼103 M⊙ towards HESS J1729−345 in each coincident Galactic arm, but no significant detection of dense molecular gas towards HESS J1731−347 at the currently-preferred distance of ∼5.2-6.2 kpc was discovered.]]",

keywords = "cosmic rays, gamma rays, gases, supernova remnants, surveys",

author = "Nigel Maxted and Gavin Rowell and Wilt, {Phoebe de} and Michael Burton and Matthieu Renaud and Yasuo Fukui and Jarryd Hawkes and Rebecca Blackwell and Fabien Voisin and Vicki Lowe and Felix Aharonian",

year = "2014",

language = "English",

booktitle = "Proceedings of Science. Volume 2014: Proceedings Cosmic Rays and the InterStellar Medium, CRISM 2014, Montpellier, France, 24-27 June 2014",

publisher = "Sissa Medialab",

note = "Cosmic Rays and the InterStellar Medium ; Conference date: 01-01-2014",

}

Maxted, N, Rowell, G, Wilt, PD, Burton, M, Renaud, M, Fukui, Y, Hawkes, J, Blackwell, R, Voisin, F, Lowe, V & Aharonian, F 2014, A dense gas survey of the gamma-ray sources HESS J1731-347 and HESS J1729-345. in Proceedings of Science. Volume 2014: Proceedings Cosmic Rays and the InterStellar Medium, CRISM 2014, Montpellier, France, 24-27 June 2014. Sissa Medialab, Cosmic Rays and the InterStellar Medium, 1/01/14.

A dense gas survey of the gamma-ray sources HESS J1731-347 and HESS J1729-345. / Maxted, Nigel; Rowell, Gavin; Wilt, Phoebe de et al.
Proceedings of Science. Volume 2014: Proceedings Cosmic Rays and the InterStellar Medium, CRISM 2014, Montpellier, France, 24-27 June 2014. Sissa Medialab, 2014.

Research output: Chapter in Book / Conference Paper › Conference Paper › peer-review

TY - GEN

T1 - A dense gas survey of the gamma-ray sources HESS J1731-347 and HESS J1729-345

AU - Maxted, Nigel

AU - Rowell, Gavin

AU - Wilt, Phoebe de

AU - Burton, Michael

AU - Renaud, Matthieu

AU - Fukui, Yasuo

AU - Hawkes, Jarryd

AU - Blackwell, Rebecca

AU - Voisin, Fabien

AU - Lowe, Vicki

AU - Aharonian, Felix

PY - 2014

Y1 - 2014

N2 - ![CDATA[The results of Mopra molecular spectral line observations towards the supernova remnant HESS J1731−347 (G353.6−0.7) and the unidentified gamma-ray source HESS J1729−345 are presented. Dense molecular gas in three different velocity-bands (corresponding to three Galactic arms) are investigated using the CS(1-0) line. The CS-traced component provides information about the dense target material in a hadronic scenario for gamma-ray production (cosmic-rays interacting with gas) and an understanding of the dynamics. Furthermore, the effects of cosmic ray diffusion into dense gas may alter the gamma-ray spectrum to cause a flattening of spectra towards such regions. Dense molecular gas mass at a level of ∼105 M⊙ was revealed in this survey, with mass of the order of ∼103 M⊙ towards HESS J1729−345 in each coincident Galactic arm, but no significant detection of dense molecular gas towards HESS J1731−347 at the currently-preferred distance of ∼5.2-6.2 kpc was discovered.]]

AB - ![CDATA[The results of Mopra molecular spectral line observations towards the supernova remnant HESS J1731−347 (G353.6−0.7) and the unidentified gamma-ray source HESS J1729−345 are presented. Dense molecular gas in three different velocity-bands (corresponding to three Galactic arms) are investigated using the CS(1-0) line. The CS-traced component provides information about the dense target material in a hadronic scenario for gamma-ray production (cosmic-rays interacting with gas) and an understanding of the dynamics. Furthermore, the effects of cosmic ray diffusion into dense gas may alter the gamma-ray spectrum to cause a flattening of spectra towards such regions. Dense molecular gas mass at a level of ∼105 M⊙ was revealed in this survey, with mass of the order of ∼103 M⊙ towards HESS J1729−345 in each coincident Galactic arm, but no significant detection of dense molecular gas towards HESS J1731−347 at the currently-preferred distance of ∼5.2-6.2 kpc was discovered.]]

KW - cosmic rays

KW - gamma rays

KW - gases

KW - supernova remnants

KW - surveys

UR - http://handle.westernsydney.edu.au:8081/1959.7/uws:49390

M3 - Conference Paper

BT - Proceedings of Science. Volume 2014: Proceedings Cosmic Rays and the InterStellar Medium, CRISM 2014, Montpellier, France, 24-27 June 2014

PB - Sissa Medialab

T2 - Cosmic Rays and the InterStellar Medium

Y2 - 1 January 2014

ER -

A dense gas survey of the gamma-ray sources HESS J1731-347 and HESS J1729-345

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