Methanol detection in M82

Abstract

We present a multilevel study of the emission of methanol, detected for the first time in this galaxy, and discuss the origin of its emission. The high observed methanol abundance of a few 10^-9 can only be explained if injection of methanol from dust grains is taken into account. While the overall [CH3OH]/[NH3] ratio is much larger than observed towards other starbursts, the dense high excitation component shows a similar value to that found in NGC 253 and Maffei 2. Our observations suggest the molecular material in M 82 to be formed by dense warm cores, shielded from the UV radiation and similar to the molecular clouds in other starbursts, surrounded by a less dense photodissociated halo. The dense warm cores are likely the location of recent and future star formation within M 82.

Accepted for publication in A&A Letters

References in corpus (11)

• Does IRAS 16293-2422 have a hot core? Chemical inventory and abundance changes in its protostellar environment
• A high spatial resolution X-ray and H-alpha study of hot gas in the halos of star-forming disk galaxies. II. Quantifying supernova feedback
• Spatially Resolved Chemistry in Nearby Galaxies I. The Center of IC 342
• Dense gas in nearby galaxies XVI. The nuclear starburst environment in NGC4945
• Photon-Dominated Chemistry in the Nucleus of M82: Widespread HOC+ emission in the inner 650 pc disk
• Astrochemistry of Sub-Millimeter Sources in Orion: Studying the Variations of Molecular Tracers with Changing Physical Conditions
• Global Physical Conditions of the Interstellar Medium in Nearby Galaxies
• Dense gas in nearby galaxies: XV. Hot ammonia in NGC253, Maffei2 and IC342
• Widespread HCO emission in the M82's nuclear starburst
• First detection of ammonia in M82
• Large scale grain mantle disruption in the Galactic Center

Cited by in corpus (26)

• Tracing shocks and photodissociation in the Galactic center region
• Lambda = 3 mm line survey of nearby active galaxies
• Molecules in galaxies
• A lambda = 1.3 mm and 2 mm molecular line survey towards M82
• Methanol as a tracer of fundamental constants
• HNCO abundances in galaxies: Tracing the evolutionary state of starbursts
• A lambda=3 mm molecular line survey of NGC1068. Chemical signatures of an AGN environment
• A large 12C/13C isotopic ratio in M82 and NGC253
• CS, HC3N and CH3CCH multi-line analyses towards starburst galaxies. The evolution of cloud structures in the central regions of galaxies
• Extragalactic CS survey
• Photodissociation chemistry footprints in the Starburst galaxy NGC 253
• Formaldehyde as a Tracer of Extragalactic Molecular Gas I. Para-H_2CO Emission From M 82
• Detection of extragalactic H3O+
• 3 mm spectral line survey of two lines of sight toward two typical cloud complexes in the Galactic Center
• Class I methanol masers in NGC253: Alcohol at the end of the bar
• Dense Gas in Nearby Galaxies: XVII. The Distribution of Ammonia in NGC253, Maffei2 and IC342
• Practical Limitations on Astrophysical Observations of Methanol to Investigate Variations in the Proton-to-Electron Mass Ratio
• Merger-induced Shocks in the Nearby LIRG VV 114 through Methanol Observations with ALMA
• Chemical evolution along the circumnuclear ring of M83
• Impact of nonconvergence and various approximations of the partition function on the molecular column densities in the interstellar medium
• Spatially Resolved Chemistry in Nearby Galaxies III. Dense Molecular Gas in the Inner Disk of the LIRG IRAS 04296+2923
• The chemical footprint of the star formation feedback in M 82 on scales of 100 pc
• Testing PDR models against ISO fine structure line data for extragalactic sources
• Astrophysical constraints on the proton-to-electron mass ratio with FAST
• Detection of 84-GHz class I methanol maser emission towards NGC 253
• Chemical complexity in NGC1068