Discovery of Hundreds of Transition Disk Candidates in the Carina Nebula

Details Discovery of Hundreds of Transition Disk Candidates in the Carina Nebula Discovery of Hundreds of Transition Disk Candidates in the Carina Nebula

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.4005s&link_type=abstract

American Astronomical Society Meeting 210, #40.05; Bulletin of the American Astronomical Society, Vol. 39, p.154

Astronomy and Astrophysics

Astronomy

Scientific paper

Transition disks are dusty protoplanetary disks surrounding young stars, where the shape of the thermal-infrared spectral energy distribution indicates a dearth of hot dust that may signify a gap in the inner disk. These objects are thought to represent a very short-lived transitionary phase that may arise either through internal photoevaporation of the inner disk by the central star, or perhaps through clearing of gas and dust in the disk by a young planet. Near the Sun, these objects are extremely rare with only a handful currently known, complicating the task of trying to understand their origin and role in star and planet formation. Here we present the discovery of hundreds of objects in the Carina Nebula that have the spectral signature of these so-called transition disks, with photospheric colors at shorter IR wavelengths, and strong IR excess emission at the longest wavelengths, seen in data obtained during our Spitzer/IRAC survey of the Carina Nebula. We discuss their impact on our view of current star and planet formation in the Carina Nebula, as well as the broader implications for the hypothesis that our own Solar System may have formed alongside very massive stars in a region much like Carina.

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