Discovery of periodic methanol masers associated with G323.46-0.08

E. Proven-Adzri; G. C. MacLeod; S. P. Van Den Heever; M. G. Hoare; A. Kuditcher; S. Goedhart

doi:10.1093/mnras/stz1458

Discovery of periodic methanol masers associated with G323.46-0.08

E. Proven-Adzri, G. C. MacLeod, S. P. Van Den Heever, M. G. Hoare, A. Kuditcher, S. Goedhart

Department of Physics

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

22 Citations (Scopus)

Abstract

The 6.7 GHz methanol masers associated with G323.46.0.08 have undergone significant change since their discovery in 1992. After 2009 April, new features with a peak flux density of ~500 Jy in the velocity channel v = -68.35 km s^-1, in the velocity range from -71 to -68.5 kms^-1 were detected. It is suggestive that it experienced an accretion event similar to that reported in S255-NIRS3 and NGC 6334I. Evidence of periodicity is found in all of the associated methanol masers with a period of ~93.5 d. It is not possible to determine if this source was periodic before 2017. However, all the 6.7 GHz methanol masers are probably amplifying a common background periodic radio source.

Original language	English
Pages (from-to)	2407-2411
Number of pages	5
Journal	Monthly Notices of the Royal Astronomical Society
Volume	487
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stz1458
Publication status	Published - 1 Aug 2019

Keywords

ISM: individual objects: G323.46-0.08
ISM: molecules
Masers
Radio lines: ISM.
Stars: formation
Stars: protostars

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10.1093/mnras/stz1458

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title = "Discovery of periodic methanol masers associated with G323.46-0.08",

abstract = "The 6.7 GHz methanol masers associated with G323.46.0.08 have undergone significant change since their discovery in 1992. After 2009 April, new features with a peak flux density of ~500 Jy in the velocity channel v = -68.35 km s-1, in the velocity range from -71 to -68.5 kms-1 were detected. It is suggestive that it experienced an accretion event similar to that reported in S255-NIRS3 and NGC 6334I. Evidence of periodicity is found in all of the associated methanol masers with a period of ~93.5 d. It is not possible to determine if this source was periodic before 2017. However, all the 6.7 GHz methanol masers are probably amplifying a common background periodic radio source.",

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AU - Proven-Adzri, E.

AU - MacLeod, G. C.

AU - Van Den Heever, S. P.

AU - Hoare, M. G.

AU - Kuditcher, A.

AU - Goedhart, S.

PY - 2019/8/1

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AB - The 6.7 GHz methanol masers associated with G323.46.0.08 have undergone significant change since their discovery in 1992. After 2009 April, new features with a peak flux density of ~500 Jy in the velocity channel v = -68.35 km s-1, in the velocity range from -71 to -68.5 kms-1 were detected. It is suggestive that it experienced an accretion event similar to that reported in S255-NIRS3 and NGC 6334I. Evidence of periodicity is found in all of the associated methanol masers with a period of ~93.5 d. It is not possible to determine if this source was periodic before 2017. However, all the 6.7 GHz methanol masers are probably amplifying a common background periodic radio source.

KW - ISM: individual objects: G323.46-0.08

KW - ISM: molecules

KW - Masers

KW - Radio lines: ISM.

KW - Stars: formation

KW - Stars: protostars

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JO - Monthly Notices of the Royal Astronomical Society

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IS - 2

ER -

Discovery of periodic methanol masers associated with G323.46-0.08

Abstract

Keywords

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