Protostars and Planets VI, Heidelberg, July 15-20, 2013
Poster 2B046
Herschel PACS photometry of 4-10 Myr old T Tauri stars in the Orion OB1b association
Briceño, Cesar (Centro de Investigaciones de Astronomía (CIDA), Apartado 264, Mérida 5101, Venezuela)
Calvet, Nuria (University of Michigan, 500 Church St., Ann Arbor, MI 48109, USA)
Anderson, Kassandra (University of Michigan, 500 Church St., Ann Arbor, MI 48109, USA)
Ali, Babar (NHSC/IPAC/Caltech, 770 South Wilson Avenue, Pasadena, CA 91125, USA)
D´Alessio, Paola (Centro de Radioastronomía y Astrofísica, UNAM, Apartado Postal 3-72 (Xangari), 58089 Morelia, Michoacán, Mexico)
McClure, Melissa (University of Michigan, 500 Church St., Ann Arbor, MI 48109, USA)
Hernández, Jesus (Centro de Investigaciones de Astronomía (CIDA), Apartado 264, Mérida 5101, Venezuela)
Espaillat, Catherine (Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA)
Ingleby, Laura (University of Michigan, 500 Church St., Ann Arbor, MI 48109, USA)
Hartmann, Lee (University of Michigan, 500 Church St., Ann Arbor, MI 48109, USA)
Megeath, Tom (University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, USA)
Stutz, Amelia (Max Planck Institut fur Astronomie, Königstuhl 17, D-69117, Heidelberg, Germany)
Abstract:
We present the first results of our Herschel PACS mapping at 70 and 160 microns, of 4 fields, each roughly 30 x 30 arcmin, located in the ~4 Myr old Orion OB1a and the ~10 Myr old Orion OB1b sub-associations. These regions contain 63 well characterized T Tauri stars (TTS), identified in the course of our large scale (~180 sq.deg.) optical multi-epoch survey of the Orion OB1 association. Sixteen stars have detections at both 70 and 160um. The SEDs of our objects exhibit a variety of disk types, from optically thick disks similar to those in the younger Taurus star forming region, to transitional disks with gaps. Comparison of the Spitzer /Herschel SED slopes with our disk models suggest that many of these disks have experienced an important degree of dust settling, a telltale sign of a more evolved state.
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