Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
A Near-infrared Survey Of Outflows In High Mass Star Forming Regions
Authors:
Ramsay, Suzanne; Varricatt, W.; Davis, C.; Todd, S.
Affiliation:
AA(ESO, Germany), AB(Joint Astronomy Centre), AC(Joint Astronomy Centre), AD(UK Astronomy Technology Centre, United Kingdom)
Publication:
American Astronomical Society, AAS Meeting #211, #162.12
Publication Date:
03/2008
Origin:
AAS
Bibliographic Code:
2008AAS...21116212R

Abstract

We will be present a near-Infrared imaging survey of the environments of candidate high mass young stellar objects. An aim of this survey has been to explore the nature of jets and outflows in these regions, to compare their characteristics with those associated with young, low mass sources and thereby to determine whether a common formation mechanism may explain star formation across the full range of stellar masses. Images of fifty regions were obtained using the United Kingdom Infrared Telescope. Observations in the near-infrared K band (2.2micron) and at the wavelengths of H2 (2.122micron) and Br gamma (2.166micron) lines were made. In a 2.2x2.2 arcmin2 field of view of 74% of the objects exhibited H2 emission and 50% exhibited aligned H2 emission features implying collimated outflows, many of which are new discoveries. These observations imply that accretion is probably the leading mechanism in the formation of stars at least up to early B and even late O type. The YSOs responsible for many of these outflows are positively identified in our near-IR images based on their locations with respect to the outflow lobes, 2MASS colours and association with MSX, IRAS, millimetre and radio sources. The close association of the molecular outflows detected in CO with the H2 emission features produced by shock excitation by the jets from the YSOs implies that the outflows in these objects are jet driven.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints