Maser emissions act as cosmic rulers for astrometric measurements of astronomical sources from protostellar scales to galactic distances, with SKA-Mid enabling expanded multi-species observations.
A Search for H2CO 6cm Emission toward Young Stellar Objects III: VLA Observations
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abstract
We report the results of our third survey for formaldehyde (H2CO) 6cm maser emission in the Galaxy. Using the Very Large Array, we detected two new H2CO maser sources (G23.01-0.41 and G25.83-0.18), thus increasing the sample of known H2CO maser regions in the Galaxy to seven. We review the characteristics of the G23.01-0.41 and G25.83-0.18 star forming regions. The H2CO masers in G23.01-0.41 and G25.83-0.18 share several properties with the other known H2CO masers, in particular, emission from rich maser environments and close proximity to very young massive stellar objects.
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Cosmic Rulers: Masers as Tools for Probing Structure in the Galaxy and Beyond, from AU to kpc
Maser emissions act as cosmic rulers for astrometric measurements of astronomical sources from protostellar scales to galactic distances, with SKA-Mid enabling expanded multi-species observations.