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Data: CH3OH_I

MCC18C - The relationship between Class I and Class II methanol masers at high angular resolution

  Interferometry data

Short title: McCarthy et el. (2018c)
Authors: McCarthy, T. P. Ellingsen, S. P. Voronkov, M. A. Cimò, G.
Journal: Monthly Notices of the Royal Astronomical Society, Volume 477, Issue 1, p.507-524
Bibcode: 2018MNRAS.477..507M      BiBTeX

PDF: MCC18C.pdf

• Target type: Class_I(95),Class_II(6)
  Transitions: CH3OH_36(I),CH3OH_84(I),CH3OH_95(I)
  

• Abstract

  We have used the Australia Telescope Compact Array (ATCA) to make the first high-resolution observations of a large sample of class I methanol masers in the 95-GHz (80-71A+) transition. The target sources consist of a statistically complete sample of 6.7-GHz class II methanol masers with an associated 95-GHz class I methanol maser, enabling a detailed study of the relationship between the two methanol maser classes at arcsecond angular resolution. These sources have been previously observed at high resolution in the 36- and 44-GHz transitions, allowing comparison between all three class I maser transitions. In total, 172 95-GHz maser components were detected across the 32 target sources. We find that at high resolution, when considering matched maser components, a 3:1 flux density ratio is observed between the 95- and 44-GHz components, consistent with a number of previous lower angular resolution studies. The 95-GHz maser components appear to be preferentially located closer to the driving sources and this may indicate that this transition is more strongly inverted nearby to background continuum sources. We do not observe an elevated association rate between 95-GHz maser emission and more evolved sources, as indicated by the presence of 12.2-GHz class II masers. We find that in the majority of cases where both class I and class II methanol emission is observed, some component of the class I emission is associated with a likely outflow candidate. eprintid: arXiv:1803.01962

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Position of H2O maser detection DSS colored 2MASS colored WISE colored SDSS color IRAC color I1,I2,I4 GLIMPSE 360 PACS color (70-160 um) SPIRE color (250-500 um) NVSS (1.4GHz) ATLASGAL 870 um ATLASGAL 870 um + Planck Bolocam 1.1 mm UKIDSS K 2MASS K