Methanol masers reveal the magnetic field of the high-mass protostar IRAS 18089-1732Citation formats

  • Authors:
  • D. Dall'Olio
  • W. H.T. Vlemmings
  • G. Surcis
  • H. Beuther
  • B. Lankhaar
  • And 3 others
  • External authors:
  • M. V. Persson
  • A. M.S. Richards
  • E. Varenius

Standard

Methanol masers reveal the magnetic field of the high-mass protostar IRAS 18089-1732. / Dall'Olio, D.; Vlemmings, W. H.T.; Surcis, G.; Beuther, H.; Lankhaar, B.; Persson, M. V.; Richards, A. M.S.; Varenius, E.

In: Astronomy and Astrophysics, Vol. 607, A111, 11.2017.

Research output: Contribution to journalArticlepeer-review

Harvard

Dall'Olio, D, Vlemmings, WHT, Surcis, G, Beuther, H, Lankhaar, B, Persson, MV, Richards, AMS & Varenius, E 2017, 'Methanol masers reveal the magnetic field of the high-mass protostar IRAS 18089-1732', Astronomy and Astrophysics, vol. 607, A111. https://doi.org/10.1051/0004-6361/201731297

APA

Dall'Olio, D., Vlemmings, W. H. T., Surcis, G., Beuther, H., Lankhaar, B., Persson, M. V., Richards, A. M. S., & Varenius, E. (2017). Methanol masers reveal the magnetic field of the high-mass protostar IRAS 18089-1732. Astronomy and Astrophysics, 607, [A111]. https://doi.org/10.1051/0004-6361/201731297

Vancouver

Dall'Olio D, Vlemmings WHT, Surcis G, Beuther H, Lankhaar B, Persson MV et al. Methanol masers reveal the magnetic field of the high-mass protostar IRAS 18089-1732. Astronomy and Astrophysics. 2017 Nov;607. A111. https://doi.org/10.1051/0004-6361/201731297

Author

Dall'Olio, D. ; Vlemmings, W. H.T. ; Surcis, G. ; Beuther, H. ; Lankhaar, B. ; Persson, M. V. ; Richards, A. M.S. ; Varenius, E. / Methanol masers reveal the magnetic field of the high-mass protostar IRAS 18089-1732. In: Astronomy and Astrophysics. 2017 ; Vol. 607.

Bibtex

@article{384f241b8ff943c4af6edd7b4e165040,
title = "Methanol masers reveal the magnetic field of the high-mass protostar IRAS 18089-1732",
abstract = "Context. The importance of the magnetic field in high-mass-star formation is not yet fully clear and there are still many open questions concerning its role in the accretion processes and generation of jets and outflows. In the past few years, masers have been successfully used to probe the magnetic field morphology and strength at scales of a few au around massive protostars, by measuring linear polarisation angles and Zeeman splitting. The massive protostar IRAS 18089-1732 is a well studied high-mass-star forming region, showing a hot core chemistry and a disc-outflow system. Previous SMA observations of polarised dust revealed an ordered magnetic field oriented around the disc of IRAS 18089-1732. Aims. We want to determine the magnetic field in the dense region probed by 6.7 GHz methanol maser observations and compare it with observations in dust continuum polarisation, to investigate how the magnetic field in the compact maser region relates to the large-scale field around massive protostars. Methods. We reduced MERLIN observations at 6.7 GHz of IRAS 18089-1732 and we analysed the polarised emission by methanol masers. Results. Our MERLIN observations show that the magnetic field in the 6.7 GHz methanol maser region is consistent with the magnetic field constrained by the SMA dust polarisation observations. A tentative detection of circularly polarised line emission is also presented. Conclusions. We found that the magnetic field in the maser region has the same orientation as in the disk. Thus the large-scale field component, even at the au scale of the masers, dominates over any small-scale field fluctuations. We obtained, from the circular polarisation tentative detection, a field strength along the line of sight of 5.5 mG which appeared to be consistent with the previous estimates.",
keywords = "Magnetic fields, Masers, Polarization, Stars: formation, Stars: massive",
author = "D. Dall'Olio and Vlemmings, {W. H.T.} and G. Surcis and H. Beuther and B. Lankhaar and Persson, {M. V.} and Richards, {A. M.S.} and E. Varenius",
year = "2017",
month = nov,
doi = "10.1051/0004-6361/201731297",
language = "English",
volume = "607",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - Methanol masers reveal the magnetic field of the high-mass protostar IRAS 18089-1732

AU - Dall'Olio, D.

AU - Vlemmings, W. H.T.

AU - Surcis, G.

AU - Beuther, H.

AU - Lankhaar, B.

AU - Persson, M. V.

AU - Richards, A. M.S.

AU - Varenius, E.

PY - 2017/11

Y1 - 2017/11

N2 - Context. The importance of the magnetic field in high-mass-star formation is not yet fully clear and there are still many open questions concerning its role in the accretion processes and generation of jets and outflows. In the past few years, masers have been successfully used to probe the magnetic field morphology and strength at scales of a few au around massive protostars, by measuring linear polarisation angles and Zeeman splitting. The massive protostar IRAS 18089-1732 is a well studied high-mass-star forming region, showing a hot core chemistry and a disc-outflow system. Previous SMA observations of polarised dust revealed an ordered magnetic field oriented around the disc of IRAS 18089-1732. Aims. We want to determine the magnetic field in the dense region probed by 6.7 GHz methanol maser observations and compare it with observations in dust continuum polarisation, to investigate how the magnetic field in the compact maser region relates to the large-scale field around massive protostars. Methods. We reduced MERLIN observations at 6.7 GHz of IRAS 18089-1732 and we analysed the polarised emission by methanol masers. Results. Our MERLIN observations show that the magnetic field in the 6.7 GHz methanol maser region is consistent with the magnetic field constrained by the SMA dust polarisation observations. A tentative detection of circularly polarised line emission is also presented. Conclusions. We found that the magnetic field in the maser region has the same orientation as in the disk. Thus the large-scale field component, even at the au scale of the masers, dominates over any small-scale field fluctuations. We obtained, from the circular polarisation tentative detection, a field strength along the line of sight of 5.5 mG which appeared to be consistent with the previous estimates.

AB - Context. The importance of the magnetic field in high-mass-star formation is not yet fully clear and there are still many open questions concerning its role in the accretion processes and generation of jets and outflows. In the past few years, masers have been successfully used to probe the magnetic field morphology and strength at scales of a few au around massive protostars, by measuring linear polarisation angles and Zeeman splitting. The massive protostar IRAS 18089-1732 is a well studied high-mass-star forming region, showing a hot core chemistry and a disc-outflow system. Previous SMA observations of polarised dust revealed an ordered magnetic field oriented around the disc of IRAS 18089-1732. Aims. We want to determine the magnetic field in the dense region probed by 6.7 GHz methanol maser observations and compare it with observations in dust continuum polarisation, to investigate how the magnetic field in the compact maser region relates to the large-scale field around massive protostars. Methods. We reduced MERLIN observations at 6.7 GHz of IRAS 18089-1732 and we analysed the polarised emission by methanol masers. Results. Our MERLIN observations show that the magnetic field in the 6.7 GHz methanol maser region is consistent with the magnetic field constrained by the SMA dust polarisation observations. A tentative detection of circularly polarised line emission is also presented. Conclusions. We found that the magnetic field in the maser region has the same orientation as in the disk. Thus the large-scale field component, even at the au scale of the masers, dominates over any small-scale field fluctuations. We obtained, from the circular polarisation tentative detection, a field strength along the line of sight of 5.5 mG which appeared to be consistent with the previous estimates.

KW - Magnetic fields

KW - Masers

KW - Polarization

KW - Stars: formation

KW - Stars: massive

UR - http://www.scopus.com/inward/record.url?scp=85035813228&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201731297

DO - 10.1051/0004-6361/201731297

M3 - Article

AN - SCOPUS:85035813228

VL - 607

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - A111

ER -