A Search for 6.7 GHz Methanol Masers in M33
arXiv:0710.1677 · doi:10.1086/524651
Abstract
We report the negative results from a search for 6.7 GHz methanol masers in the nearby spiral galaxy M33. We observed 14 GMCs in the central 4 kpc of the Galaxy, and found 3 sigma upper limits to the flux density of ~9 mJy in spectral channels having a velocity width of 0.069 km/s. By velocity shifting and combining the spectra from the positions observed, we obtain an effective 3sigma upper limit on the average emission of ~1mJy in a 0.25 km/s channel. These limits lie significantly below what we would expect based on our estimates of the methanol maser luminosity function in the Milky Way. The most likely explanation for the absence of detectable methanol masers appears to be the metallicity of M33, which is modestly less than that of the Milky Way.
References in corpus (13)
- The Relationship Between Gas Content and Star Formation in Molecule-Rich Spiral Galaxies
- Giant Molecular Clouds in M33 - I. BIMA All Disk Survey
- A general catalogue of 6.7 GHz methanol masers. I: data
- Methanol masers : Reliable tracers of the early stages of high-mass star formation
- The Molecular Gas Distribution and Schmidt Law in M33
- The Arecibo Methanol Maser Galactic Plane Survey--I: Data
- Neon and Oxygen Abundances in M33
- Determination of the Distance to M33 Based on the Tip of the Red Giant Branch and the Red Clump
- Determination of the Distance to M33 Based on Single Epoch I-band HST Observations of Cepheids
- The Arecibo Methanol Maser Galactic Plane Survey - II: Statistical and Multi-wavelength Counterpart Analysis
- A general catalogue of 6.7GHz methanol masers II: statistical analysis
- A Search for 6.7 GHz Methanol Masers in OH Megamaser Galaxies at 0.11<z<0.27
- A Search for Extragalactic Methanol Masers
Cited by in corpus (6)
- Turbulent molecular clouds
- The Arecibo Methanol Maser Galactic Plane Survey - III: Distances and Luminosities
- Discovery of the first methanol (CH3OH) maser in the Andromeda galaxy (M31)
- Practical Limitations on Astrophysical Observations of Methanol to Investigate Variations in the Proton-to-Electron Mass Ratio
- Pulsed Radio Emission from the Fermi-LAT Pulsar J1732-3131: Search and A Possible Detection at 34.5 MHz
- A search for water maser emission in nearby low-luminosity QSO host galaxies