Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://mavr.sao.ru/hq/balega/PUBL_BAL/PUB_2005/kraus.k3-50a.ps Äàòà èçìåíåíèÿ: Tue May 5 16:19:42 2009 Äàòà èíäåêñèðîâàíèÿ: Tue Aug 18 06:49:58 2009 Êîäèðîâêà: Ïîèñêîâûå ñëîâà: ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï ï

Astron. Nachr. / AN 326 (2005), Suppl. Issue 7 -- Short Contributions AG 2005 Kln 1
Bispectrum speckle imaging of the ultracompact HII region K3­50A
STEFAN KRAUS 1 , YURI Y. BALEGA 2 , KARL­HEINZ HOFMANN 1 , THOMAS PREIBISCH 1 ,
GERD WEIGELT 1
1 Max­Planck­Institut fr Radioastronomie, Auf dem Hegel 69, 53121 Bonn, Germany
2 Special Astrophysical Observatory, Nizhnij Arkhyz, Karachai­Cherkesia 357147, Russia
skraus@mpifr­bonn.mpg.de
We present K # ­band bispectrum speckle interferometry of the ultracompact H II region K3­50A. Our image
resolves the central 1 ## â 1 ## region into at least 7 point­like objects. We find K # ­band counterparts for all but
one of the N­band sources discovered by Okamoto et al. (2003), and there are additional K # ­band sources which
were unresolved in the N­band images. Our reconstructed image also reveals the fine­structure of the cone­shaped
nebulosity extending to the south. The brightest K # ­band source is located exactly at the tip of the cone­shaped
nebulosity. The nebula shows several arcs and the orientation of its main axis agrees very well with the direction
of the CO outflow from K3­50A. This nebulosity therefore very likely represents the clumpy inner surface of a
partially evacuated cavity excavated by the strong outflows.