A survey for hydroxyl in the THOR pilot region around W43

Andrew J. Walsh; Henrik Beuther; Simon Bihr; Katharine G. Johnston; Joanne R. Dawson; Jürgen Ott; Steven N. Longmore; Q. Nguyên Luong; Ralf S. Klessen; Sarah Ragan; Naomi McClure-Griffiths; Andreas Brunthaler; James Urquhart; Karl Menten; Frank Bigiel; Friedrich Wyrowski; Michael Rugel

doi:10.1093/mnras/stv2446

A survey for hydroxyl in the THOR pilot region around W43

Andrew J. Walsh^*, Henrik Beuther, Simon Bihr, Katharine G. Johnston, Joanne R. Dawson, Jürgen Ott, Steven N. Longmore, Q. Nguyên Luong, Ralf S. Klessen, Sarah Ragan, Naomi McClure-Griffiths, Andreas Brunthaler, James Urquhart, Karl Menten, Frank Bigiel, Friedrich Wyrowski, Michael Rugel

^*Corresponding author for this work

Centre in Astronomy, Astrophysics & Astrophotonics

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

16 Citations (Scopus)

Abstract

We report on observations of the hydroxyl radical (OH) within The HI, OH, Recombination line survey (THOR) pilot region. The region is bounded approximately between Galactic coordinates l = 29.°2 to 31.°5 and b = -1.°0 to +1.°0 and includes the high-mass star-forming region W43. We identify 103 maser sites, including 72 with 1612 MHz masers, 42 showing masers in either of the main-line transitions at 1665 and 1667MHzand four showing 1720MHz masers. Most maser sites with either main-line or 1720 MHz emission are associated with star formation, whereas most of the 1612 MHz masers are associated with evolved stars. We find that nearly all of the main-line maser sites are co-spatial with an infrared source, detected by GLIMPSE. We also find diffuse OH emission, as well as OH in absorption towards selected unresolved or partially resolved sites. Extended OH absorption is found towards the wellknown star-forming complex W43 Main.

Original language	English
Pages (from-to)	3494-3510
Number of pages	17
Journal	Monthly Notices of the Royal Astronomical Society
Volume	455
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stv2446
Publication status	Published - 1 Feb 2016

Keywords

ISM: molecules
Masers
Stars: formation

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10.1093/mnras/stv2446

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Walsh, A. J., Beuther, H., Bihr, S., Johnston, K. G., Dawson, J. R., Ott, J., Longmore, S. N., Nguyên Luong, Q., Klessen, R. S., Ragan, S., McClure-Griffiths, N., Brunthaler, A., Urquhart, J., Menten, K., Bigiel, F., Wyrowski, F., & Rugel, M. (2016). A survey for hydroxyl in the THOR pilot region around W43. Monthly Notices of the Royal Astronomical Society, 455(4), 3494-3510. https://doi.org/10.1093/mnras/stv2446

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title = "A survey for hydroxyl in the THOR pilot region around W43",

abstract = "We report on observations of the hydroxyl radical (OH) within The HI, OH, Recombination line survey (THOR) pilot region. The region is bounded approximately between Galactic coordinates l = 29.°2 to 31.°5 and b = -1.°0 to +1.°0 and includes the high-mass star-forming region W43. We identify 103 maser sites, including 72 with 1612 MHz masers, 42 showing masers in either of the main-line transitions at 1665 and 1667MHzand four showing 1720MHz masers. Most maser sites with either main-line or 1720 MHz emission are associated with star formation, whereas most of the 1612 MHz masers are associated with evolved stars. We find that nearly all of the main-line maser sites are co-spatial with an infrared source, detected by GLIMPSE. We also find diffuse OH emission, as well as OH in absorption towards selected unresolved or partially resolved sites. Extended OH absorption is found towards the wellknown star-forming complex W43 Main.",

keywords = "ISM: molecules, Masers, Stars: formation",

author = "Walsh, {Andrew J.} and Henrik Beuther and Simon Bihr and Johnston, {Katharine G.} and Dawson, {Joanne R.} and J{\"u}rgen Ott and Longmore, {Steven N.} and {Nguy{\^e}n Luong}, Q. and Klessen, {Ralf S.} and Sarah Ragan and Naomi McClure-Griffiths and Andreas Brunthaler and James Urquhart and Karl Menten and Frank Bigiel and Friedrich Wyrowski and Michael Rugel",

year = "2016",

month = feb,

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doi = "10.1093/mnras/stv2446",

language = "English",

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Walsh, AJ, Beuther, H, Bihr, S, Johnston, KG, Dawson, JR, Ott, J, Longmore, SN, Nguyên Luong, Q, Klessen, RS, Ragan, S, McClure-Griffiths, N, Brunthaler, A, Urquhart, J, Menten, K, Bigiel, F, Wyrowski, F & Rugel, M 2016, 'A survey for hydroxyl in the THOR pilot region around W43', Monthly Notices of the Royal Astronomical Society, vol. 455, no. 4, pp. 3494-3510. https://doi.org/10.1093/mnras/stv2446

TY - JOUR

T1 - A survey for hydroxyl in the THOR pilot region around W43

AU - Walsh, Andrew J.

AU - Beuther, Henrik

AU - Bihr, Simon

AU - Johnston, Katharine G.

AU - Dawson, Joanne R.

AU - Ott, Jürgen

AU - Longmore, Steven N.

AU - Nguyên Luong, Q.

AU - Klessen, Ralf S.

AU - Ragan, Sarah

AU - McClure-Griffiths, Naomi

AU - Brunthaler, Andreas

AU - Urquhart, James

AU - Menten, Karl

AU - Bigiel, Frank

AU - Wyrowski, Friedrich

AU - Rugel, Michael

PY - 2016/2/1

Y1 - 2016/2/1

N2 - We report on observations of the hydroxyl radical (OH) within The HI, OH, Recombination line survey (THOR) pilot region. The region is bounded approximately between Galactic coordinates l = 29.°2 to 31.°5 and b = -1.°0 to +1.°0 and includes the high-mass star-forming region W43. We identify 103 maser sites, including 72 with 1612 MHz masers, 42 showing masers in either of the main-line transitions at 1665 and 1667MHzand four showing 1720MHz masers. Most maser sites with either main-line or 1720 MHz emission are associated with star formation, whereas most of the 1612 MHz masers are associated with evolved stars. We find that nearly all of the main-line maser sites are co-spatial with an infrared source, detected by GLIMPSE. We also find diffuse OH emission, as well as OH in absorption towards selected unresolved or partially resolved sites. Extended OH absorption is found towards the wellknown star-forming complex W43 Main.

AB - We report on observations of the hydroxyl radical (OH) within The HI, OH, Recombination line survey (THOR) pilot region. The region is bounded approximately between Galactic coordinates l = 29.°2 to 31.°5 and b = -1.°0 to +1.°0 and includes the high-mass star-forming region W43. We identify 103 maser sites, including 72 with 1612 MHz masers, 42 showing masers in either of the main-line transitions at 1665 and 1667MHzand four showing 1720MHz masers. Most maser sites with either main-line or 1720 MHz emission are associated with star formation, whereas most of the 1612 MHz masers are associated with evolved stars. We find that nearly all of the main-line maser sites are co-spatial with an infrared source, detected by GLIMPSE. We also find diffuse OH emission, as well as OH in absorption towards selected unresolved or partially resolved sites. Extended OH absorption is found towards the wellknown star-forming complex W43 Main.

KW - ISM: molecules

KW - Masers

KW - Stars: formation

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U2 - 10.1093/mnras/stv2446

DO - 10.1093/mnras/stv2446

M3 - Article

AN - SCOPUS:84959149653

SN - 0035-8711

VL - 455

SP - 3494

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

A survey for hydroxyl in the THOR pilot region around W43

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