The Nature of the Cluster of Radio Sources in GGD 14

Details The Nature of the Cluster of Radio Sources in GGD 14 The Nature of the Cluster of Radio Sources in GGD 14

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..15..136g&link_type=abstract

Winds, Bubbles, and Explosions: a conference to honor John Dyson, Pátzcuaro, Michoacán, México, September 9-13, 2002 (Eds. S. J.

Astronomy and Astrophysics

Astronomy

H Ii Regions, Individual: Ggd 14, Ism: Jets And Outflows, Stars: Pre-Main Sequence

Scientific paper

We present sensitive radio continuum observations at 3.6 and 6 cm made simultaneously toward the star-forming region GGD 14. The observations reveal the presence of nine extremely compact ( <= 0''.3) and faint radio sources in a region of 30 arcsec around the bright cometary H II region, VLA 1. Eight of these sources show variability at radio wavelengths, and their spectral indices are characteristically negative. Four of the faint sources have an IR counterpart. We propose that gyrosynchrotron radiation from an active magnetosphere explains the emission from almost all the faint compact sources, suggesting that the GGD 14 region harbors a cluster of low-mass, pre-main-sequence stars. The only sources that do not show time variability are VLA 1, the cometary H II region, and VLA 7, the powering source of the molecular outflow.

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