Published October 20, 2015
| Published + Submitted
Journal Article
Open
An Orphan No Longer? Detection of the Southern Orphan Stream and a Candidate Progenitor
Abstract
Using a shallow, two-color survey carried out with the Dark Energy Camera, we detect the southern, possibly trailing arm of the Orphan Stream. The stream is reliably detected to a decl. of −38°, bringing the total known length of the Orphan Stream to 108°. We find a slight offset or "S" shape in the stream at δ ≃ −14° that would be consistent with the transition from leading to trailing arms. This coincides with a moderate concentration of 137 ± 25 stars (to g = 21.6) that we consider a possible remnant of the Orphan progenitor. The position of this feature is in agreement with previous predictions.
Additional Information
© 2015 American Astronomical Society. Received 2015 July 16; accepted 2015 September 23; published 2015 October 15. We gratefully acknowledge Jonathan Hargis for helpful suggestions in the course of developing our photometry pipeline. This project used data obtained with the Dark Energy Camera (DECam), which was constructed by the Dark Energy Survey (DES) collaboration. Funding for the DES Projects has been provided by the DOE and NSF(USA), MISE(Spain), STFC(UK), HEFCE(UK). NCSA(UIUC), KICP(U. Chicago), CCAPP(Ohio State), MIFPA(Texas A&M), CNPQ, FAPERJ, FINEP (Brazil), MINECO(Spain), DFG(Germany), and the collaborating institutions in the Dark Energy Survey, which are Argonne Lab, UC Santa Cruz, University of Cambridge, CIEMAT-Madrid, University of Chicago, University College London, DES-Brazil Consortium, University of Edinburgh, ETH Zurich, Fermilab, University of Illinois, ICE (IEECCSIC), IFAE Barcelona, Lawrence Berkeley Lab, LMU Munchen and the associated Excellence Cluster Universe, University of Michigan, NOAO, University of Nottingham, Ohio State University, University of Pennsylvania, University of Portsmouth, SLAC National Lab, Stanford University, University of Sussex, and Texas A&M University. Facility: CTIO:Blanco (DECam).Attached Files
Published - Grillmair,CJetal.pdf
Submitted - 1509.07503v1.pdf
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Grillmair,CJetal.pdf
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Additional details
- Eprint ID
- 63120
- Resolver ID
- CaltechAUTHORS:20151222-080933013
- Department of Energy (DOE)
- NSF
- MISE (Spain)
- Science and Technology Facilities Council (STFC)
- Higher Education Funding Council for England
- National Center for Supercomputing Applications (NCSA)
- Kavli Institute for Cosmological Physics
- Center of Cosmology and Astro Particle Physics (CCAPP)
- George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy (MIFPA)
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- Ministerio de Economía y Competitividad (MINECO)
- Deutsche Forschungsgemeinschaft (DFG)
- Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
- Financiadora de Estudos e Projetos (FINEP)
- Created
-
2015-12-22Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)