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Astron. Astrophys. 359, L5-L8 (2000)

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Letter to the Editor

Detection of the thermal radio continuum emission from the G9.62+0.19-F Hot Core

L. Testi 1, P. Hofner 2,3, S. Kurtz 4 and M. Rupen 5

1 Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
2 University of Puerto Rico at Rio Piedras, Physics Department, P.O. Box 23343, San Juan, Puerto Rico 00931
3 NAIC/Cornell University, Arecibo Observatory, HC3 Box 53995, Arecibo, Puerto Rico 00612
4 Instituto de Astronomía, UNAM, Apdo. Postal 70-264, 04510 México D.F., México
5 National Radio Astronomy Observatory, Socorro, NM 87801

Received 12 May 2000 / Accepted 5 June 2000


We present new high resolution and high sensitivity multi-frequency VLA radio continuum observations of the G9.62+0.19-F hot molecular core. We detect for the first time faint centimetric radio continuum emission at the position of the core. The centimetric continuum spectrum of the source is consistent with thermal emission from ionised gas. This is the first direct evidence that a newly born massive star is powering the G9.62+0.19-F hot core.

Key words: ISM: H ii regions – ISM: individual objects: G9.62+0.19 – stars: formation

Send offprint requests to: L. Testi (lt@arcetri.astro.it)

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© European Southern Observatory (ESO) 2000

Online publication: July 7, 2000