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SDSSJ103913.70+533029.7: A Super Star Cluster in the Outskirts of a Galaxy Merger

G. R. Knapp·C. A. Tremonti·C. M. Rockosi
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Abstract

We describe the serendipitous discovery in the spectroscopic data of the Sloan Digital Sky Survey of a star-like object, SDSSJ103913.70+533029.7, at a heliocentric radial velocity of +1012 km/s. Its proximity in position and velocity to the spiral galaxy NGC 3310 suggests an association with the galaxy. At this distance, SDSSJ103913.70+533029.7 has the luminosity of a super star cluster and a projected distance of 17 kpc from NGC 3310. Its spectroscopic and photometric properties imply a mass of > 10^6 solar masses and an age close to that of the tidal shells seen around NGC 3310, suggesting that it formed in the event which formed the shells.

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G. R. Knapp, C. A. Tremonti, C. M. Rockosi. 2005-10-31. SDSSJ103913.70+533029.7: A Super Star Cluster in the Outskirts of a Galaxy Merger. https://doi.org/10.1086/499304

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