Submillimeter and Millimeter Masers

Abstract

Despite theoretical predictions of the existence of many submillimeter masers, and some pioneering observational discoveries over the past few decades, these lines have remained relatively unstudied due to (i) challenges associated with observing at shorter wavelength; and, (ii) lack of possibility of high (< 14'' at 345 GHz) angular resolution observations. With the advent of the SMA, the first submillimeter imaging array capable of sub-arcsecond resolution, APEX, and the promise of ALMA, opportunities are opening for performing new science with millimeter/submillmeter masers. In this talk, I will review recent work in the field - including extragalactic water millimeter masers, hydrogen recombination masers, submillimeter masers in star-forming regions, and in the envelopes of evolved stars - and discuss prospects for the future.

10 pages, 2 figures, 2 tables; to appear in conference proceedings of IAU 242: Astrophysical Masers and Their Environments, held in Alice Springs, Australia (March 2007)

References in corpus (12)

• Models of class II methanol masers based on improved molecular data
• Evidence for a Geometrically Thick Self-Gravitating Accretion Disk in NGC 3079
• High-J v=0 SiS Maser Emission in IRC+10216: A New Case of Infrared Overlaps
• Water Vapor around Sgr B2
• Hydrogen Masers. I: Theory and Prospects
• Physical conditions in shocked regions of Orion from ground-based observations of H_2O
• A Submillimeter HCN Laser in IRC+10216
• First Detection of Millimeter/Submillimeter Extragalactic H2O Maser Emission
• Interferometric Observation of the Highly Polarized SiO Maser Emission from the $v=1,J=5-4$ Transition Associated with VY Canis Majoris
• Submillimeter Array Observations of 321 GHz Water Maser Emission in Cepheus A
• The simultaneous detection of 22- and 321-GHz H2O maser emission towards the symbiotic Mira R Aquarii
• Towards the Event Horizon - High Resolution VLBI Imaging of Nuclei of Active Galaxies

Cited by in corpus (11)

• SiO maser emission from red supergiants across the Galaxy: I. Targets in massive star clusters
• ATOMIUM: Probing the inner wind of evolved O-rich stars with new, highly excited H${}_2$O and OH lines
• Linear polarization of submillimetre masers. Tracing magnetic fields with ALMA
• Non--local radiative transfer in strongly inverted masers
• Vibrationally excited water emission at 658 GHz from evolved stars
• Simultaneous 183 GHz H2O Maser and SiO Observations Towards Evolved Stars Using APEX SEPIA Band 5
• Deep into the Water Fountains: The case of IRAS 18043-2116
• H_2^{16}O and H_2^{18}O Maser Emission from Gas-Dust Clouds
• Evidence for Coupling of Evolved Star Atmospheres and Spiral Arms of the Milky Way
• Neural network ensemble for computing cross sections for rotational transitions in H${}_2$O + H${}_2$O collisions
• Survey of (sub)mm water masers in low-mass star-forming regions