SIMBAD references

2007PASJ...59..743S - Publ. Astron. Soc. Jap., 59, 743-751 (2007/August-0)

Absolute proper motions of H2OMasers away from the galactic plane measured with VERA in the "Superbubble" region NGC 281.

SATO M., HIROTA T., HONMA M., KOBAYASHI H., SASAO T., BUSHIMATA T., CHOI Y.K., IMAI H., IWADATE K., JIKE T., KAMENO S., KAMEYA O., KAMOHARA R., KAN-YA Y., KAWAGUCHI N., KIJIMA M., KIM M.K., KUJI S., KURAYAMA T., MANABE S., MARUYAMA K., MATSUI M., MATSUMOTO N., MIYAJI T., NAGAYAMA T., NAKAGAWA A., NAKAMURA K., OH C.S., OMODAKA T., OYAMA T., SAKAI S., SATO K., SHIBATA K.M., SHINTANI M., TAMURA Y., TSUSHIMA M. and YAMASHITA K.

Abstract (from CDS):

begin{HTML}We report on absolute proper-motion measurements of an H2O maser source in the NGC 281 West molecular cloud, which is located ∼320 pc above the Galactic plane and is associated with an H I loop extending from the Galactic plane. We conducted multi-epoch phase-referencing observations of the maser source with VERA (VLBI Exploration of Radio Astrometry) over a monitoring period of 6 months, since 2006 May. We find that the H2O maser features in NGC 281 West are systematically moving toward the southwest and further away from the Galactic plane with a vertical velocity of 20-30 km/s at its estimated distance of 2.2-3.5 kpc. Our new results provide the most direct evidence that the gas in the NGC 281 region on the H I loop was blown out from the Galactic plane, most likely in a superbubble driven by multiple or sequential supernova explosions in the Galactic plane.

Abstract Copyright:

Journal keyword(s): Galaxy: kinematics and dynamics - ISM: bubbles - ISM: H II regions - ISM: individual: NGC 281 - masers (H2O)

Simbad objects: 10

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