A large-scale, low-frequency murchison widefield array survey of galactic H II regions between 260 < l < 340

L. Hindson; M. Johnston-Hollitt; N. Hurley-Walker; J. R. Callingham; H. Su; J. Morgan; M. Bell; G. Bernardi; J. D. Bowman; F. Briggs; R. J. Cappallo; A. A. Deshpande; K. S. Dwarakanath; B. Q. For; B. M. Gaensler; L. J. Greenhill; P. Hancock; B. J. Hazelton; A. D. Kapinska; D. L. Kaplan; E. Lenc; C. J. Lonsdale; B. Mckinley; S. R. McWhirter; D. A. Mitchell; M. F. Morales; E. Morgan; D. Oberoi; A. Offringa; S. M. Ord; P. Procopio; T. Prabu; N. Udaya Shankar; K. S. Srivani; L. Staveley-Smith; R. Subrahmanyan; S. J. Tingay; R. B. Wayth; R. L. Webster; A. Williams; C. L. Williams; C. Wu; Q. Zheng

doi:10.1017/pasa.2016.19

A large-scale, low-frequency murchison widefield array survey of galactic H II regions between 260 < l < 340

L. Hindson, M. Johnston-Hollitt, N. Hurley-Walker, J. R. Callingham, H. Su, J. Morgan, M. Bell, G. Bernardi, J. D. Bowman, F. Briggs, R. J. Cappallo, A. A. Deshpande, K. S. Dwarakanath, B. Q. For, B. M. Gaensler, L. J. Greenhill, P. Hancock, B. J. Hazelton, A. D. Kapinska, D. L. KaplanE. Lenc, C. J. Lonsdale, B. Mckinley, S. R. McWhirter, D. A. Mitchell, M. F. Morales, E. Morgan, D. Oberoi, A. Offringa, S. M. Ord, P. Procopio, T. Prabu, N. Udaya Shankar, K. S. Srivani, L. Staveley-Smith, R. Subrahmanyan, S. J. Tingay, R. B. Wayth, R. L. Webster, A. Williams, C. L. Williams, C. Wu, Q. Zheng

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Abstract

We have compiled a catalogue of H ii regions detected with the Murchison Widefield Array between 72 and 231 MHz. The multiple frequency bands provided by the Murchison Widefield Array allow us identify the characteristic spectrum generated by the thermal Bremsstrahlung process in H ii regions. We detect 306 H ii regions between 260^◦ < l < 340^◦ and report on the positions, sizes, peak, integrated flux density, and spectral indices of these H ii regions. By identifying the point at which H ii regions transition from the optically thin to thick regime, we derive the physical properties including the electron density, ionised gas mass, and ionising photon flux, towards 61 H ii regions. This catalogue of H ii regions represents the most extensive and uniform low frequency survey of H ii regions in the Galaxy to date.

Original language	English
Article number	e020
Journal	Publications of the Astronomical Society of Australia
Volume	33
DOIs	https://doi.org/10.1017/pasa.2016.19
Publication status	Published - 17 May 2016

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Hindson, L., Johnston-Hollitt, M., Hurley-Walker, N., Callingham, J. R., Su, H., Morgan, J., Bell, M., Bernardi, G., Bowman, J. D., Briggs, F., Cappallo, R. J., Deshpande, A. A., Dwarakanath, K. S., For, B. Q., Gaensler, B. M., Greenhill, L. J., Hancock, P., Hazelton, B. J., Kapinska, A. D., ... Zheng, Q. (2016). A large-scale, low-frequency murchison widefield array survey of galactic H II regions between 260 < l < 340. Publications of the Astronomical Society of Australia, 33, Article e020. https://doi.org/10.1017/pasa.2016.19

@article{10978422ff7c4aabb52cc963304505b0,

title = "A large-scale, low-frequency murchison widefield array survey of galactic H II regions between 260 < l < 340",

abstract = "We have compiled a catalogue of H ii regions detected with the Murchison Widefield Array between 72 and 231 MHz. The multiple frequency bands provided by the Murchison Widefield Array allow us identify the characteristic spectrum generated by the thermal Bremsstrahlung process in H ii regions. We detect 306 H ii regions between 260◦ < l < 340◦ and report on the positions, sizes, peak, integrated flux density, and spectral indices of these H ii regions. By identifying the point at which H ii regions transition from the optically thin to thick regime, we derive the physical properties including the electron density, ionised gas mass, and ionising photon flux, towards 61 H ii regions. This catalogue of H ii regions represents the most extensive and uniform low frequency survey of H ii regions in the Galaxy to date.",

keywords = "(ISM:) HII regions, Catalogs, Radio continuum: ISM",

author = "L. Hindson and M. Johnston-Hollitt and N. Hurley-Walker and Callingham, \{J. R.\} and H. Su and J. Morgan and M. Bell and G. Bernardi and Bowman, \{J. D.\} and F. Briggs and Cappallo, \{R. J.\} and Deshpande, \{A. A.\} and Dwarakanath, \{K. S.\} and For, \{B. Q.\} and Gaensler, \{B. M.\} and Greenhill, \{L. J.\} and P. Hancock and Hazelton, \{B. J.\} and Kapinska, \{A. D.\} and Kaplan, \{D. L.\} and E. Lenc and Lonsdale, \{C. J.\} and B. Mckinley and McWhirter, \{S. R.\} and Mitchell, \{D. A.\} and Morales, \{M. F.\} and E. Morgan and D. Oberoi and A. Offringa and Ord, \{S. M.\} and P. Procopio and T. Prabu and \{Udaya Shankar\}, N. and Srivani, \{K. S.\} and L. Staveley-Smith and R. Subrahmanyan and Tingay, \{S. J.\} and Wayth, \{R. B.\} and Webster, \{R. L.\} and A. Williams and Williams, \{C. L.\} and C. Wu and Q. Zheng",

note = "Publisher Copyright: {\textcopyright} Astronomical Society of Australia 2016.",

year = "2016",

month = may,

day = "17",

doi = "10.1017/pasa.2016.19",

language = "English",

volume = "33",

journal = "Publications of the Astronomical Society of Australia",

issn = "1323-3580",

publisher = "Cambridge University Press",

}

Hindson, L, Johnston-Hollitt, M, Hurley-Walker, N, Callingham, JR, Su, H, Morgan, J, Bell, M, Bernardi, G, Bowman, JD, Briggs, F, Cappallo, RJ, Deshpande, AA, Dwarakanath, KS, For, BQ, Gaensler, BM, Greenhill, LJ, Hancock, P, Hazelton, BJ, Kapinska, AD, Kaplan, DL, Lenc, E, Lonsdale, CJ, Mckinley, B, McWhirter, SR, Mitchell, DA, Morales, MF, Morgan, E, Oberoi, D, Offringa, A, Ord, SM, Procopio, P, Prabu, T, Udaya Shankar, N, Srivani, KS, Staveley-Smith, L, Subrahmanyan, R, Tingay, SJ, Wayth, RB, Webster, RL, Williams, A, Williams, CL, Wu, C & Zheng, Q 2016, 'A large-scale, low-frequency murchison widefield array survey of galactic H II regions between 260 < l < 340', Publications of the Astronomical Society of Australia, vol. 33, e020. https://doi.org/10.1017/pasa.2016.19

TY - JOUR

T1 - A large-scale, low-frequency murchison widefield array survey of galactic H II regions between 260 < l < 340

AU - Hindson, L.

AU - Johnston-Hollitt, M.

AU - Hurley-Walker, N.

AU - Callingham, J. R.

AU - Su, H.

AU - Morgan, J.

AU - Bell, M.

AU - Bernardi, G.

AU - Bowman, J. D.

AU - Briggs, F.

AU - Cappallo, R. J.

AU - Deshpande, A. A.

AU - Dwarakanath, K. S.

AU - For, B. Q.

AU - Gaensler, B. M.

AU - Greenhill, L. J.

AU - Hancock, P.

AU - Hazelton, B. J.

AU - Kapinska, A. D.

AU - Kaplan, D. L.

AU - Lenc, E.

AU - Lonsdale, C. J.

AU - Mckinley, B.

AU - McWhirter, S. R.

AU - Mitchell, D. A.

AU - Morales, M. F.

AU - Morgan, E.

AU - Oberoi, D.

AU - Offringa, A.

AU - Ord, S. M.

AU - Procopio, P.

AU - Prabu, T.

AU - Udaya Shankar, N.

AU - Srivani, K. S.

AU - Staveley-Smith, L.

AU - Subrahmanyan, R.

AU - Tingay, S. J.

AU - Wayth, R. B.

AU - Webster, R. L.

AU - Williams, A.

AU - Williams, C. L.

AU - Wu, C.

AU - Zheng, Q.

PY - 2016/5/17

Y1 - 2016/5/17

N2 - We have compiled a catalogue of H ii regions detected with the Murchison Widefield Array between 72 and 231 MHz. The multiple frequency bands provided by the Murchison Widefield Array allow us identify the characteristic spectrum generated by the thermal Bremsstrahlung process in H ii regions. We detect 306 H ii regions between 260◦ < l < 340◦ and report on the positions, sizes, peak, integrated flux density, and spectral indices of these H ii regions. By identifying the point at which H ii regions transition from the optically thin to thick regime, we derive the physical properties including the electron density, ionised gas mass, and ionising photon flux, towards 61 H ii regions. This catalogue of H ii regions represents the most extensive and uniform low frequency survey of H ii regions in the Galaxy to date.

AB - We have compiled a catalogue of H ii regions detected with the Murchison Widefield Array between 72 and 231 MHz. The multiple frequency bands provided by the Murchison Widefield Array allow us identify the characteristic spectrum generated by the thermal Bremsstrahlung process in H ii regions. We detect 306 H ii regions between 260◦ < l < 340◦ and report on the positions, sizes, peak, integrated flux density, and spectral indices of these H ii regions. By identifying the point at which H ii regions transition from the optically thin to thick regime, we derive the physical properties including the electron density, ionised gas mass, and ionising photon flux, towards 61 H ii regions. This catalogue of H ii regions represents the most extensive and uniform low frequency survey of H ii regions in the Galaxy to date.

KW - (ISM:) HII regions

KW - Catalogs

KW - Radio continuum: ISM

UR - https://www.scopus.com/pages/publications/84969262584

U2 - 10.1017/pasa.2016.19

DO - 10.1017/pasa.2016.19

M3 - Article

SN - 1323-3580

VL - 33

JO - Publications of the Astronomical Society of Australia

JF - Publications of the Astronomical Society of Australia

M1 - e020

ER -

A large-scale, low-frequency murchison widefield array survey of galactic H II regions between 260 < l < 340

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