A Bow Shock of Heated Dust Surrounding the Galactic Center Source IRS 8

Details A Bow Shock of Heated Dust Surrounding the Galactic Center Source IRS 8 A Bow Shock of Heated Dust Surrounding the Galactic Center Source IRS 8

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...20114503g&link_type=abstract

American Astronomical Society Meeting 201, #145.03; Bulletin of the American Astronomical Society, Vol. 35, p.571

Astronomy and Astrophysics

Astronomy

Scientific paper

High resolution H and K images obtained by the Gemini North Telescope of the peculiar infrared source, IRS 8, located roughly 30" north of the Galactic center, reveal a central pointlike object enveloped in a remarkable bow-shock, whose apex is located 0.2'' to the northeast. The H-K' color of the bow shock is considerably redder than that of the central star. A UKIRT K band spectrum reveals that the central object of IRS 8 has a featureless continuum and that no shocked line emission (e.g., from H2) is physically associated with the bow. We interpret the bow as resulting from the interaction of the envelope or wind of the central star of IRS 8 with an extension of the northern arm of Sgr A West or with the circumnuclear molecular ring, and its emission as coming from a combination of shock- and radiatively heated dust. IRS 8 may have been flung out from the central cluster of hot stars.

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