Class i Methanol Maser Emission in NGC 4945

Tiege P. McCarthy; Simon P. Ellingsen; Xi Chen; Shari L. Breen; Maxim A. Voronkov; Hai Hua Qiao

doi:10.1017/S1743921317010687

Class i Methanol Maser Emission in NGC 4945

Tiege P. McCarthy, Simon P. Ellingsen, Xi Chen, Shari L. Breen, Maxim A. Voronkov, Hai Hua Qiao

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

Abstract

We have detected maser emission from the 36.2 GHz (4-1 → 30E) methanol transition towards NGC 4945. This emission has been observed in two separate epochs and is approximately five orders of magnitude more luminous than typical emission from this transition within our Galaxy. NGC 4945 is only the fourth extragalactic source observed hosting class I methanol maser emission. Extragalactic class I methanol masers do not appear to be simply highly-luminous variants of their galactic counterparts and instead appear to trace large-scale regions where low-velocity shocks are present in molecular gas.

Original language	English
Pages (from-to)	105-108
Number of pages	4
Journal	Proceedings of the International Astronomical Union
Volume	13
Issue number	S336
DOIs	https://doi.org/10.1017/S1743921317010687
Publication status	Published - 2017
Externally published	Yes

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title = "Class i Methanol Maser Emission in NGC 4945",

abstract = "We have detected maser emission from the 36.2 GHz (4-1 → 30E) methanol transition towards NGC 4945. This emission has been observed in two separate epochs and is approximately five orders of magnitude more luminous than typical emission from this transition within our Galaxy. NGC 4945 is only the fourth extragalactic source observed hosting class I methanol maser emission. Extragalactic class I methanol masers do not appear to be simply highly-luminous variants of their galactic counterparts and instead appear to trace large-scale regions where low-velocity shocks are present in molecular gas.",

keywords = "galaxies: starburst, masers, stars: formation",

author = "McCarthy, {Tiege P.} and Ellingsen, {Simon P.} and Xi Chen and Breen, {Shari L.} and Voronkov, {Maxim A.} and Qiao, {Hai Hua}",

note = "Publisher Copyright: {\textcopyright} International Astronomical Union 2018.",

year = "2017",

doi = "10.1017/S1743921317010687",

language = "English",

volume = "13",

pages = "105--108",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

number = "S336",

}

TY - JOUR

T1 - Class i Methanol Maser Emission in NGC 4945

AU - McCarthy, Tiege P.

AU - Ellingsen, Simon P.

AU - Chen, Xi

AU - Breen, Shari L.

AU - Voronkov, Maxim A.

AU - Qiao, Hai Hua

N1 - Publisher Copyright: © International Astronomical Union 2018.

PY - 2017

Y1 - 2017

N2 - We have detected maser emission from the 36.2 GHz (4-1 → 30E) methanol transition towards NGC 4945. This emission has been observed in two separate epochs and is approximately five orders of magnitude more luminous than typical emission from this transition within our Galaxy. NGC 4945 is only the fourth extragalactic source observed hosting class I methanol maser emission. Extragalactic class I methanol masers do not appear to be simply highly-luminous variants of their galactic counterparts and instead appear to trace large-scale regions where low-velocity shocks are present in molecular gas.

AB - We have detected maser emission from the 36.2 GHz (4-1 → 30E) methanol transition towards NGC 4945. This emission has been observed in two separate epochs and is approximately five orders of magnitude more luminous than typical emission from this transition within our Galaxy. NGC 4945 is only the fourth extragalactic source observed hosting class I methanol maser emission. Extragalactic class I methanol masers do not appear to be simply highly-luminous variants of their galactic counterparts and instead appear to trace large-scale regions where low-velocity shocks are present in molecular gas.

KW - galaxies: starburst

KW - masers

KW - stars: formation

UR - http://www.scopus.com/inward/record.url?scp=85060093068&partnerID=8YFLogxK

U2 - 10.1017/S1743921317010687

DO - 10.1017/S1743921317010687

M3 - Article

AN - SCOPUS:85060093068

SN - 1743-9213

VL - 13

SP - 105

EP - 108

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S336

ER -

Class i Methanol Maser Emission in NGC 4945

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