SCYON Abstract

Received on November 3 2006

S K1: A Possible Case of Triggered Star Formation in Perseus

AuthorsM. Rengel (1), K.-W. Hodapp (2), and J. Eislöffel (3)
Affiliation
(1) Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany
(2) Institute for Astronomy, Hilo, United States
(3) Thüringer Landessternwarte Tautenburg, Tautenburg, Germany
To appear inTriggered Star Formation in a Turbulent ISM, International Astronomical Union. Symposium no. 237, held 14-18 August, 2006 in Prague, Czech Republic, S237, #38
Contactrengel@mps.mpg.de
URLhttp://www.arxiv.org/abs/astro-ph/0610825
Links

Abstract

According to a triggered star formation scenario (e.g. Martin-Pintado & Cernicharo 1987) outflows powered by young stellar objects shape the molecular clouds, can dip cavities, and trigger new star formation. NGC 1333 is an active site of low- and intermediate star formation in Perseus and it is a suggested site of self-regulated star formation (Normal & Silk 1980). Therefore it is a suitable target for a study of triggered star formation, and for further observations of discovered triggered star formation candidates (e.g. Sandell & Knee 2001, SK01). For another hand, continuum submillimetre observations of star forming regions can detect dust thermal emission of embedded sources (which drive outflows), and further detailed structure. Within the framework of our wide-field mapping of star formation regions in the Perseus and Orion molecular clouds using SCUBA at 850 and 450 μm, we map NCG 1333 with an area of around 14' x 21'. The maps show more structure than the previously been observed in submillimetre for the region. We have unveiled the known embedded SK 1 source (in the dust shell south of the SSV 13 ridge) and detailed structure, among some other young stellar sources. In agreement with the SK01 observations, our map of the region shows lumpy filaments and shells/cavities that seem to be created by outflows. The measured mass of SK 1 (~0.07 M[o]) is much less than its virial mass (~0.2-1 M[o]). Our observations support the idea of SK 1 as an event triggered by outflow-driven shells in NGC 1333 (induced by an increase in gas pressure and density due to radiation pressure from the stellar winds, that have presumably created the dust shell). This kind of evidences provides a more thorough understanding of the star formation regulation processes.