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Discovery of two neighbouring satellites in the Carina constellation with MagLiteS
| Indexado |
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| DOI | 10.1093/MNRAS/STY170 | ||||
| Año | 2018 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Abstract
We report the discovery of two ultra-faint satellites in the vicinity of the Large Magellanic Cloud (LMC) in data from the Magellanic Satellites Survey (MagLiteS). Situated 18 deg (similar to 20 kpc) from the LMC and separated from each other by only 18 arcmin, Carina II and III form an intriguing pair. By simultaneously modelling the spatial and the colour-magnitude stellar distributions, we find that both Carina II and Carina III are likely dwarf galaxies, although this is less clear for Carina III. There are in fact several obvious differences between the two satellites. While both are well described by an old and metal poor population, Carina II is located at similar to 36 kpc from the Sun, with M-V similar to -4.5 and r(h) similar to 90 pc, and it is further confirmed by the discovery of 3 RR Lyrae at the right distance. In contrast, Carina III is much more elongated, measured to be fainter (M-V similar to -2.4), significantly more compact (r(h) similar to 30 pc), and closer to the Sun, at similar to 28 kpc, placing it only 8 kpc away from Car II. Together with several other systems detected by the Dark Energy Camera, Carina II and III form a strongly anisotropic cloud of satellites in the vicinity of the Magellanic Clouds.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Torrealba, G. | - |
UNIV CAMBRIDGE - Reino Unido
Acad Sinica - Taiwán Institute of Astronomy - Reino Unido Academia Sinica, Institute of Astronomy and Astrophysics - Taiwán |
| 2 | Belokurov, Vasily | Hombre |
UNIV CAMBRIDGE - Reino Unido
Flatiron Inst - Estados Unidos Institute of Astronomy - Reino Unido Flatiron Institute - Estados Unidos Simons Foundation - Estados Unidos |
| 3 | Koposov, S. | Hombre |
UNIV CAMBRIDGE - Reino Unido
Carnegie Mellon Univ - Estados Unidos Institute of Astronomy - Reino Unido Carnegie Mellon University - Estados Unidos |
| 4 | Bechtol, K. | Hombre |
Large Synopt Survey Telescope - Estados Unidos
Large Synoptic Survey Telescope - Estados Unidos |
| 5 | Drlica-Wagner, A. | Hombre |
Fermilab Natl Accelerator Lab - Estados Unidos
Fermi National Accelerator Laboratory - Estados Unidos |
| 6 | Olsen, Knut A. G. | Hombre |
Natl Opt Astron Observ - Estados Unidos
National Optical Astronomy Observatory - Estados Unidos |
| 7 | Vivas, A. Katherina | Mujer |
Natl Opt Astron Observ - Chile
Cerro Tololo Inter American Observatory - Chile National Optical Astronomy Observatory - Chile |
| 8 | Yanny, B. | Hombre |
Fermilab Natl Accelerator Lab - Estados Unidos
Fermi National Accelerator Laboratory - Estados Unidos |
| 9 | Jethwa, Prashin | - |
UNIV CAMBRIDGE - Reino Unido
Institute of Astronomy - Reino Unido |
| 10 | WALKER, ALISTAIR | Hombre |
Natl Opt Astron Observ - Chile
Cerro Tololo Inter American Observatory - Chile National Optical Astronomy Observatory - Chile |
| 11 | Bulik, T. | Hombre |
Fermilab Natl Accelerator Lab - Estados Unidos
Fermi National Accelerator Laboratory - Estados Unidos |
| 12 | Allam, S. | Mujer |
Fermilab Natl Accelerator Lab - Estados Unidos
Fermi National Accelerator Laboratory - Estados Unidos |
| 13 | Conn, Blair C. | - |
Mt Stromlo & Siding Spring Observ - Australia
Australian National University, Mount Stromlo Observatory - Australia |
| 14 | Gallart, C. | Mujer |
Inst Astrofis Canarias - España
UNIV LA LAGUNA - España Instituto Astrofisico de Canarias - España Universidad de La Laguna - España |
| 15 | Gruen, D. | Hombre |
UNIV ILLINOIS - Estados Unidos
Natl Ctr Supercomp Applicat - Estados Unidos University of Illinois at Urbana-Champaign - Estados Unidos University of Illinois Urbana-Champaign - Estados Unidos |
| 16 | James, David J. | Hombre |
Harvard Smithsonian Ctr Astrophys - Estados Unidos
Harvard-Smithsonian Center for Astrophysics - Estados Unidos |
| 17 | Johnson, Margaret W. G. | Mujer |
Natl Ctr Supercomp Applicat - Estados Unidos
University of Illinois at Urbana-Champaign - Estados Unidos University of Illinois Urbana-Champaign - Estados Unidos |
| 18 | Kuehn, K. | Hombre |
Australian Astron Observ - Australia
Australian Astronomical Observatory - Australia |
| 19 | Kuropatkin, N. | Hombre |
Fermilab Natl Accelerator Lab - Estados Unidos
Fermi National Accelerator Laboratory - Estados Unidos |
| 20 | Martin, N. F. | Hombre |
Univ Strasbourg - Francia
Max Planck Inst Astron - Alemania Université de Strasbourg - Francia Max Planck Institute for Astronomy - Alemania |
| 21 | Martinez-Delgado, D. | Hombre |
Heidelberg Univ - Alemania
Astronomisches Rechen-Institut Heidelberg - Alemania Astronomisches Rechen-Institut - Alemania |
| 22 | Ségransan, Damien | Hombre |
Natl Opt Astron Observ - Estados Unidos
National Optical Astronomy Observatory - Estados Unidos |
| 23 | Noël, N. E.D. | Mujer |
Univ Surrey - Reino Unido
University of Surrey - Reino Unido |
| 24 | Simon, Joshua D. | Hombre |
Observ Carnegie Inst Sci - Estados Unidos
Observatorio Las Campanas - Estados Unidos |
| 25 | Stringfellow, Guy | Hombre |
UNIV COLORADO - Estados Unidos
University of Colorado Boulder - Estados Unidos |
| 26 | Tucker, D. L. | Hombre |
Fermilab Natl Accelerator Lab - Estados Unidos
Fermi National Accelerator Laboratory - Estados Unidos |
| Fuente |
|---|
| National Science Foundation |
| Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro |
| Conselho Nacional de Desenvolvimento Científico e Tecnológico |
| Ministerio de Economía y Competitividad |
| Comisión Nacional de Investigación Científica y Tecnológica |
| Spanish Ministry of Economy and Competitiveness |
| University of Illinois at Urbana-Champaign |
| Australian Research Council |
| Deutsche Forschungsgemeinschaft |
| Ministry of Science and Technology |
| Financiadora de Estudos e Projetos |
| European Research Council |
| Conicyt Chile |
| U.S. Department of Energy |
| U.S. National Science Foundation |
| Ohio State University |
| Comisión Nacional de Investigación CientÃfica y Tecnológica |
| Science and Technology Facilities Council |
| Robert Martin Ayers Sciences Fund |
| Seventh Framework Programme |
| Lawrence Berkeley National Laboratory |
| University of Portsmouth |
| Ministerio de EconomÃa y Competitividad |
| University of Chicago |
| Science and Technology Facilities Council of the United Kingdom |
| Spanish Ministry of Economy and Competitiveness (MINECO) |
| University of Cambridge |
| Office of Science |
| University of Michigan |
| Academia Sinica |
| Ministry of Science and Education of Spain |
| Higher Education Funding Council for England |
| National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign |
| Kavli Institute of Cosmological Physics at the University of Chicago |
| Center for Cosmology and Astro-Particle Physics at the Ohio State University |
| Mitchell Institute for Fundamental Physics and Astronomy at Texas AM University |
| Ministerio da Ciencia, Tecnologia e Inovacao |
| Argonne National Laboratory |
| University College London |
| University of Edinburgh |
| Eidgenossische Technische Hochschule (ETH) Zurich |
| Fermi National Accelerator Laboratory |
| Institut de Ciencies de l'Espai (IEEC/CSIC) |
| Institut de Fisica d'Altes Energies |
| Ludwig-Maximilians Universitat Munchen |
| National Optical Astronomy Observatory |
| University of Nottingham |
| University of Pennsylvania |
| SLAC National Accelerator Laboratory |
| University of Sussex |
| Texas AM University |
| University of California at Santa Cruz |
| Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid |
| Stanford University |
| DES-Brazil Consortium |
| European Research Council under the European Union |
| U.S. Department of Energy, Office of Science, Office of High Energy Physics |
| Horizon 2020 Framework Programme |
| Ministry of Science and Technology, Taiwan |
| SLAC National Accelerator Laboratory, Stanford University |
| Fermilab |
| NationalCenter for Supercomputing Applications at the University of Illinois at Urbana-Champaign |
| Excellence Cluster Universe |
| Collaborating Institutions in the Dark Energy Survey |
| Fermi Research Alliance, LLC |
| Texas A and M University |
| Center for Cosmology and Astroparticle Physics, Ohio State University |
| Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University |
| Ministerio de Ciencia y TecnologÃa |
| High Energy Physics |
| United States Government |
| University of California, Santa Cruz |
| Eidgenössische Technische Hochschule Zürich |
| Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico |
| Universidade do Estado do Rio de Janeiro |
| Pesquisa do Estado do Rio de Janeiro |
| Minist?rio da Ci?ncia |
| Collaborating Institutions are Argonne National Laboratory |
| Institut de Ci?ncies de l'Espai |
| Institut de F?sica d'Altes Energies |
| Ludwig-Maximilians Universit ? |
| Science and Technology FacilitiesCouncil |
| Eidgen?ssische Technische Hochschule |
| Agradecimiento |
|---|
| GT acknowledges support from the Ministry of Science and Technology grant MOST 105-2112-M-001-028-MY3, and a Career Development Award (to YTL) from Academia Sinica. |
| Support for GT is provided by CONICYT Chile. We are grateful for Director's Discretionary time on the Blanco 4 m with DECam. CG acknowledges support by the Spanish Ministry of Economy and Competitiveness (MINECO) under grant AYA2014-56795-P. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC grant agreement no. 308024. BCC acknowledges the support of the Australian Research Council through Discovery project DP150100862. Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, theMinistry of Science and Education of Spain, the Science and Technology FacilitiesCouncil of theUnitedKingdom, theHigher Education Funding Council for England, the NationalCenter for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, the Center for Cosmology and Astro-Particle Physics at the Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Financiadora de Estudos e Projetos, Funda??o Carlos Chagas Filho de Amparo ? Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico and the Minist?rio da Ci?ncia, Tecnologia e Inovac?o, the Deutsche Forschungsgemeinschaft, and the Collaborating Institutions in the Dark Energy Survey. The Collaborating Institutions are Argonne National Laboratory, the University of California at Santa Cruz, the University of Cambridge, Centro de Investigaciones En?rgeticas, Medioambientales y Tecnol?gicas-Madrid, the University of Chicago, University College London, the DES-Brazil Consortium, the University of Edinburgh, the Eidgen?ssische Technische Hochschule (ETH) Z?rich, Fermi National Accelerator Laboratory, the University of Illinois at Urbana-Champaign, the Institut de Ci?ncies de l'Espai (IEEC/CSIC), the Institut de F?sica d'Altes Energies, Lawrence Berkeley National Laboratory, the Ludwig-Maximilians Universit ?t M?nchen and the associated Excellence Cluster Universe, the University of Michigan, the National Optical Astronomy Observatory, the University of Nottingham, the Ohio State University, the University of Pennsylvania, the University of Portsmouth, SLAC National Accelerator Laboratory, Stanford University, the University of Sussex, and Texas A&M University. This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. TheUnited StatesGovernment retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. This research has made use of the APASS data base, located at the AAVSO web site. Funding for APASS has been provided by the Robert Martin Ayers Sciences Fund. BCC acknowledges the support of the Australian Research Council through Discovery project DP150100862. GTacknowledges support from the Ministry of Science and Technology grant MOST 105-2112-M-001-028-MY3, and a Career Development Award (to YTL) from Academia Sinica. |
