| Name | OT1_pabraham_3 |
| Title | A deep 70 micrometer study of cold circumstellar disks in rho Oph: down below the brown dwarf limit |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342238816&instrument_name=PACS&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-6c4pgqv |
| Author | abraham, p. |
| Description | Most stars form in clusters, and the nearest example of an embedded young cluster is the one in the L1688 cloud of the rho Ophiuchi region. It is one of the best explored star-forming region, an intermediate exemplar between the sparse regions of Taurus and the rich, massive cluster of Orion. With the aim of detecting brown dwarfs (BDs) with masses down to a few Jupiter masses, our group conducted a major preparatory observational project in L1688, where we have spectroscopically confirmed 28 new brown dwarfs. The new discoveries increased the known population of BDs by a factor of 3 and provided the so far most complete census of the (sub)stellar population of the rho Oph cluster. Here we propose a comprehensive study of the cold circumstellar disks of the pre-main sequence population, with particular emphasis on the very low mass objects and BDs. Utilizing the unprecedented far-infrared sensitivity and spatial resolution of Herschel, we will obtain deep 70 and 160 micrometer maps of a 1.6 deg^2 area centred on the L1688 cloud, covering also the location of the 28 new brown dwarfs. We intend to (1) study the most complete population of brown dwarf disks in rho Oph; (2) analyse disk properties and evolution across the stellar mass range; and (3) characterize the protostar population and its luminosity function. Our programme provides the opportunity to characterize the complete, homogeneous population of disks around both young BDs and low-mass stars in the benchmark protocluster of rho Oph. The produced deep 70 micrometer map of the region will also have a very high legacy value, since flux densities for sources to be discovered (e.g. new confirmed BDs) can be extracted in the future. The total Herschel observing time for the proposed programme is 12.8 h. |
| Publication | The (w)hole survey: An unbiased sample study of transition disk candidates based on Spitzer catalogs . van der Marel N. et al. . Astronomy & Astrophysics, Volume 592, id.A126, 36 pp. . 592 . 10.1051/0004-6361/201628075 . 2016A&A...592A.126V , Revised SED of the triple protostellar system VLA 1623-2417 . Murillo N. M. et al. . Astronomy & Astrophysics, Volume 615, id.L14, 5 pp. . 615 . 10.1051/0004-6361/201833420 . 2018A&A...615L..14M , Herschel survey of brown dwarf disks in ρ Ophiuchi . Alves de Oliveira C. et al. . Astronomy & Astrophysics, Volume 559, id.A126, 10 pp. . 559 . 10.1051/0004-6361/201322402 . 2013A&A...559A.126A , Far-infrared to Millimeter Data of Protoplanetary Disks: Dust Growth in the Taurus, Ophiuchus, and Chamaeleon I Star-forming Regions . Ribas Álvaro et al. . The Astrophysical Journal, Volume 849, Issue 1, article id. 63, 27 pp. (2017). . 849 . 10.3847/1538-4357/aa8e99 . 2017ApJ...849...63R , Infrared study of transitional disks in Ophiuchus with Herschel . Rebollido Isabel et al. . Astronomy & Astrophysics, Volume 581, id.A30, 20 pp. . 581 . 10.1051/0004-6361/201425556 . 2015A&A...581A..30R , Extremely Dense Cores Associated with Chandra Sources in Ophiuchus A: Forming Brown Dwarfs Unveiled? . Kawabe Ryohei et al. . The Astrophysical Journal, Volume 866, Issue 2, article id. 141, 15 pp. (2018). . 866 . 10.3847/1538-4357/aae153 . 2018ApJ...866..141K , The Ophiuchus DIsc Survey Employing ALMA (ODISEA) - III. The evolution of substructures in massive d... |
| Instrument | PACS_PacsPhoto_largeScan |
| Temporal Coverage | 2012-02-08T17:04:31Z/2012-02-09T05:50:30Z |
| Version | SPG v14.2.0 |
| Mission Description | Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities. |
| Creator Contact | https://support.cosmos.esa.int/h®erschel/ |
| Date Published | 2012-08-08T23:28:09Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2012-08-08T23:28:09Z, OT1_pabraham_3, SPG v14.2.0. https://doi.org/10.5270/esa-6c4pgqv |