A New Galactic 6cm Formaldehyde Maser

Abstract

We report the detection of a new H2CO maser in the massive star forming region G23.71-0.20 (IRAS 18324-0820), i.e., the fifth region in the Galaxy where H2CO maser emission has been found. The new H2CO maser is located toward a compact HII region, and is coincident in velocity and position with 6.7 GHz methanol masers and with an IR source as revealed by Spitzer/IRAC GLIMPSE data. The coincidence with an IR source and 6.7 GHz methanol masers suggests that the maser is in close proximity to an embedded massive protostar. Thus, the detection of H2CO maser emission toward G23.71-0.20 supports the trend that H2CO 6cm masers trace molecular material very near young massive stellar objects.

Accepted for publication in The Astrophysical Journal Letters

References in corpus (5)

• New Catalogs of Compact Radio Sources in the Galactic Plane
• Resolution of Distance Ambiguities of Inner Galaxy Massive Star Formation Regions II
• 3-D Models of Embedded High-Mass Stars: Effects of a Clumpy Circumstellar Medium
• The Formaldehyde Masers in NGC 7538 and G29.96-0.02: VLBA, MERLIN, and VLA Observations
• Investigating the Nature of the Dust Emission around Massive Protostar NGC 7538 IRS 1: Circumstellar Disk and Outflow?

Cited by in corpus (13)

• The diversity of methanol maser morphologies from VLBI observations
• Quasi-Periodic Formaldehyde Maser Flares in the Massive Protostellar Object IRAS18566+0408
• Dust and gas emission in the prototypical hot core G29.96-0.02 at sub-arcsecond resolution
• A Search for H2CO 6cm Emission toward Young Stellar Objects III: VLA Observations
• The Formaldehyde Masers in Sgr B2: Very Long Baseline Array and Very Large Array Observations
• An H2CO 6cm Maser Pinpointing a Possible Circumstellar Torus in IRAS18566+0408
• Methyl Cyanide Observations Toward Massive Protostars
• Molecular line search toward the flaring 6.7-GHz methanol masers of G24.33+0.13 and G359.6-0.243: rare maser transitions detected
• Masers and star formation
• A Review of H2CO 6cm Masers in the Galaxy
• Long-term Variability of H${}_2$CO Masers in Star-forming Regions
• Thermal Formaldehyde Emission in NGC7538 IRS1
• Notes on the formaldehyde masers