University of Hertfordshire

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From the same journal

6.7-GHz methanol maser associated outflows: an evolutionary sequence

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6.7-GHz methanol maser associated outflows : an evolutionary sequence. / De Villiers, Helena Maria; Chrysostomou, A.; Thompson, M.A.; Urquhart, J.S.; Breen, S.L.; Burton, M.G.; Ellingsen, S.P.; Fuller, G.A.; Pestalozzi, Michele; Voronkov, M. A.; Ward-Thompson, D.

In: Monthly Notices of the Royal Astronomical Society, Vol. 449, No. 1, 01.05.2015, p. 119-128.

Research output: Contribution to journalArticlepeer-review

Harvard

De Villiers, HM, Chrysostomou, A, Thompson, MA, Urquhart, JS, Breen, SL, Burton, MG, Ellingsen, SP, Fuller, GA, Pestalozzi, M, Voronkov, MA & Ward-Thompson, D 2015, '6.7-GHz methanol maser associated outflows: an evolutionary sequence', Monthly Notices of the Royal Astronomical Society, vol. 449, no. 1, pp. 119-128. https://doi.org/10.1093/mnras/stv173

APA

De Villiers, H. M., Chrysostomou, A., Thompson, M. A., Urquhart, J. S., Breen, S. L., Burton, M. G., Ellingsen, S. P., Fuller, G. A., Pestalozzi, M., Voronkov, M. A., & Ward-Thompson, D. (2015). 6.7-GHz methanol maser associated outflows: an evolutionary sequence. Monthly Notices of the Royal Astronomical Society, 449(1), 119-128. https://doi.org/10.1093/mnras/stv173

Vancouver

De Villiers HM, Chrysostomou A, Thompson MA, Urquhart JS, Breen SL, Burton MG et al. 6.7-GHz methanol maser associated outflows: an evolutionary sequence. Monthly Notices of the Royal Astronomical Society. 2015 May 1;449(1):119-128. https://doi.org/10.1093/mnras/stv173

Author

De Villiers, Helena Maria ; Chrysostomou, A. ; Thompson, M.A. ; Urquhart, J.S. ; Breen, S.L. ; Burton, M.G. ; Ellingsen, S.P. ; Fuller, G.A. ; Pestalozzi, Michele ; Voronkov, M. A. ; Ward-Thompson, D. / 6.7-GHz methanol maser associated outflows : an evolutionary sequence. In: Monthly Notices of the Royal Astronomical Society. 2015 ; Vol. 449, No. 1. pp. 119-128.

Bibtex

@article{81d5b4ef2e3f4039968cace1a168b44c,
title = "6.7-GHz methanol maser associated outflows: an evolutionary sequence",
abstract = "We present a continuing study of a sample 44 molecular outflows, observed in 13CO lines, closely associated with 6.7-GHz methanol masers, hence called methanol maser associated outflows (MMAOs). We compare MMAO properties with those of outflows from other surveys in the literature. In general, MMAOs follow similar trends, but show a deficit in number at low masses and momenta, with a corresponding higher fraction at the high end of the distributions. A similar trend is seen for the dynamical time-scales of MMAOs. We argue that the lack of relatively low mass and young flows in MMAOs is due to the inherent selection-bias in the sample, i.e. its direct association with 6.7-GHz methanol masers. This implies that methanol masers must switch on after the onset of outflows (hence accretion), and not before a sufficient abundance of methanol is liberated from icy dust mantles. Consequently the average dynamical age of MMAOs is older than for the general population of molecular outflows. We propose an adjusted evolutionary sequence of outflow and maser occurrence in the hot core phase, where methanol masers turn on after the onset of the outflow phase.",
author = "{De Villiers}, {Helena Maria} and A. Chrysostomou and M.A. Thompson and J.S. Urquhart and S.L. Breen and M.G. Burton and S.P. Ellingsen and G.A. Fuller and Michele Pestalozzi and Voronkov, {M. A.} and D. Ward-Thompson",
note = "Date of Acceptance: 23/01/2015",
year = "2015",
month = may,
day = "1",
doi = "10.1093/mnras/stv173",
language = "English",
volume = "449",
pages = "119--128",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "1",

}

RIS

TY - JOUR

T1 - 6.7-GHz methanol maser associated outflows

T2 - an evolutionary sequence

AU - De Villiers, Helena Maria

AU - Chrysostomou, A.

AU - Thompson, M.A.

AU - Urquhart, J.S.

AU - Breen, S.L.

AU - Burton, M.G.

AU - Ellingsen, S.P.

AU - Fuller, G.A.

AU - Pestalozzi, Michele

AU - Voronkov, M. A.

AU - Ward-Thompson, D.

N1 - Date of Acceptance: 23/01/2015

PY - 2015/5/1

Y1 - 2015/5/1

N2 - We present a continuing study of a sample 44 molecular outflows, observed in 13CO lines, closely associated with 6.7-GHz methanol masers, hence called methanol maser associated outflows (MMAOs). We compare MMAO properties with those of outflows from other surveys in the literature. In general, MMAOs follow similar trends, but show a deficit in number at low masses and momenta, with a corresponding higher fraction at the high end of the distributions. A similar trend is seen for the dynamical time-scales of MMAOs. We argue that the lack of relatively low mass and young flows in MMAOs is due to the inherent selection-bias in the sample, i.e. its direct association with 6.7-GHz methanol masers. This implies that methanol masers must switch on after the onset of outflows (hence accretion), and not before a sufficient abundance of methanol is liberated from icy dust mantles. Consequently the average dynamical age of MMAOs is older than for the general population of molecular outflows. We propose an adjusted evolutionary sequence of outflow and maser occurrence in the hot core phase, where methanol masers turn on after the onset of the outflow phase.

AB - We present a continuing study of a sample 44 molecular outflows, observed in 13CO lines, closely associated with 6.7-GHz methanol masers, hence called methanol maser associated outflows (MMAOs). We compare MMAO properties with those of outflows from other surveys in the literature. In general, MMAOs follow similar trends, but show a deficit in number at low masses and momenta, with a corresponding higher fraction at the high end of the distributions. A similar trend is seen for the dynamical time-scales of MMAOs. We argue that the lack of relatively low mass and young flows in MMAOs is due to the inherent selection-bias in the sample, i.e. its direct association with 6.7-GHz methanol masers. This implies that methanol masers must switch on after the onset of outflows (hence accretion), and not before a sufficient abundance of methanol is liberated from icy dust mantles. Consequently the average dynamical age of MMAOs is older than for the general population of molecular outflows. We propose an adjusted evolutionary sequence of outflow and maser occurrence in the hot core phase, where methanol masers turn on after the onset of the outflow phase.

U2 - 10.1093/mnras/stv173

DO - 10.1093/mnras/stv173

M3 - Article

VL - 449

SP - 119

EP - 128

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -