Two Ultra-faint Milky Way Stellar Systems Discovered in Early Data from the DECam Local Volume Exploration Survey
文献类型：期刊论文
| 作者 | Mau, S.4; Cerny, W.; Pace, A. B.; Choi, Y.; Drlica-Wagner, A.; Santana-Silva, L.; Riley, A. H.; Erkal, D.; Stringfellow, G. S.; Adamow, M. |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2020-02-20 |
| 卷号 | 890期号:2页码:12 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab6c67 |
| 英文摘要 | We report the discovery of two ultra-faint stellar systems found in early data from the DECam Local Volume Exploration survey (DELVE). The first system, Centaurus I (DELVE J1238-4054), is identified as a resolved overdensity of old and metal-poor stars with a heliocentric distance of D-circle dot = 116.3(-0.6)(+0.6) kpc, a half-light radius of r(h) = 2.3(-0.3)(+0.4) arcmin, an age of tau > 12.85 Gyr, a metallicity of Z = 0.0002(-0.0002)(+0.0001), and an absolute magnitude of M-V = -5.55(-0.11)(+0.11) mag. This characterization is consistent with the population of ultra-faint satellites, and confirmation of this system would make Centaurus I one of the brightest recently discovered ultra-faint dwarf galaxies. Centaurus I is detected in Gaia DR2 with a clear and distinct proper motion signal, confirming that it is a real association of stars distinct from the Milky Way foreground; this is further supported by the clustering of blue horizontal branch stars near the centroid of the system. The second system, DELVE 1 (DELVE J1630-0058), is identified as a resolved overdensity of stars with a heliocentric distance of D-circle dot = 19.0(-0.6)(+0.5) kpc, a half-light radius of r(h) = 0.97(-0.17)(+0.24) arcmin, an age of tau = 12.5(-0.7)(+1.0) Gyr, a metallicity of Z = 0.0005(-0.0001)(+0.0002), and an absolute magnitude of M-V = -0.2(-0.6)(+0.8) mag, consistent with the known population of faint halo star clusters. Given the low number of probable member stars at magnitudes accessible with Gaia DR2, a proper motion signal for DELVE 1 is only marginally detected. We compare the spatial position and proper motion of both Centaurus I and DELVE 1 with simulations of the accreted satellite population of the Large Magellanic Cloud (LMC) and find that neither is likely to be associated with the LMC. |
| WOS关键词 | GLOBULAR-CLUSTER SYSTEMS ; DWARF GALAXIES ; DARK-MATTER ; MAGELLANIC STREAM ; TOTAL MASS ; ACS SURVEY ; ALL-SKY ; SATELLITE ; POPULATION ; EFFICIENT |
| 资助项目 | University of Chicago Provost's Scholar Award ; NSF[AST-1813881] ; NSF[AST-1816196] ; NSF[AST-1821987] ; NSF[AST-1821967] ; NSF[AST-1813708] ; NSF[AST-1813466] ; NSF[AST-1908972] ; CONICYT FONDECYT Regular grant[1181797] ; NASA Fermi Guest Investigator Program Cycle 9[91201] ; Fermilab LDRD project[L2019-011] ; DOE (USA) ; NSF (USA) ; MISE (Spain) ; STFC (UK) ; HEFCE (UK) ; NCSA(UIUC) ; KICP (U. Chicago) ; CCAPP (Ohio State) ; MIFPA (Texas AM University) ; CNPQ ; FAPERJ ; FINEP (Brazil) ; MINECO (Spain) ; DFG (Germany) ; 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 (IEEC-CSIC) ; IFAE Barcelona ; Lawrence Berkeley Lab ; LMU Munchen ; associated Excellence Cluster Universe ; University of Michigan ; NSF's National Optical-Infrared Astronomy Research Laboratory ; University of Nottingham ; Ohio State University ; OzDES Membership Consortium University of Pennsylvania ; University of Portsmouth ; SLAC National Lab ; Stanford University ; University of Sussex ; Texas AM University ; US Department of Energy, Office of Science, Office of High Energy Physics[DE-AC02-07CH11359] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000522100700045 |
| 资助机构 | University of Chicago Provost's Scholar Award ; University of Chicago Provost's Scholar Award ; NSF ; NSF ; CONICYT FONDECYT Regular grant ; CONICYT FONDECYT Regular grant ; NASA Fermi Guest Investigator Program Cycle 9 ; NASA Fermi Guest Investigator Program Cycle 9 ; Fermilab LDRD project ; Fermilab LDRD project ; DOE (USA) ; DOE (USA) ; NSF (USA) ; NSF (USA) ; MISE (Spain) ; MISE (Spain) ; STFC (UK) ; STFC (UK) ; HEFCE (UK) ; HEFCE (UK) ; NCSA(UIUC) ; NCSA(UIUC) ; KICP (U. Chicago) ; KICP (U. Chicago) ; CCAPP (Ohio State) ; CCAPP (Ohio State) ; MIFPA (Texas AM University) ; MIFPA (Texas AM University) ; CNPQ ; CNPQ ; FAPERJ ; FAPERJ ; FINEP (Brazil) ; FINEP (Brazil) ; MINECO (Spain) ; MINECO (Spain) ; DFG (Germany) ; DFG (Germany) ; Argonne Lab ; Argonne Lab ; UC Santa Cruz ; UC Santa Cruz ; University of Cambridge ; University of Cambridge ; CIEMAT-Madrid ; CIEMAT-Madrid ; University of Chicago ; University of Chicago ; University College London ; University College London ; DES-Brazil Consortium ; DES-Brazil Consortium ; University of Edinburgh ; University of Edinburgh ; ETH Zurich ; ETH Zurich ; Fermilab ; Fermilab ; University of Illinois ; University of Illinois ; ICE (IEEC-CSIC) ; ICE (IEEC-CSIC) ; IFAE Barcelona ; IFAE Barcelona ; Lawrence Berkeley Lab ; Lawrence Berkeley Lab ; LMU Munchen ; LMU Munchen ; associated Excellence Cluster Universe ; associated Excellence Cluster Universe ; University of Michigan ; University of Michigan ; NSF's National Optical-Infrared Astronomy Research Laboratory ; NSF's National Optical-Infrared Astronomy Research Laboratory ; University of Nottingham ; University of Nottingham ; Ohio State University ; Ohio State University ; OzDES Membership Consortium University of Pennsylvania ; OzDES Membership Consortium University of Pennsylvania ; University of Portsmouth ; University of Portsmouth ; SLAC National Lab ; SLAC National Lab ; Stanford University ; Stanford University ; University of Sussex ; University of Sussex ; Texas AM University ; Texas AM University ; US Department of Energy, Office of Science, Office of High Energy Physics ; US Department of Energy, Office of Science, Office of High Energy Physics ; University of Chicago Provost's Scholar Award ; University of Chicago Provost's Scholar Award ; NSF ; NSF ; CONICYT FONDECYT Regular grant ; CONICYT FONDECYT Regular grant ; NASA Fermi Guest Investigator Program Cycle 9 ; NASA Fermi Guest Investigator Program Cycle 9 ; Fermilab LDRD project ; Fermilab LDRD project ; DOE (USA) ; DOE (USA) ; NSF (USA) ; NSF (USA) ; MISE (Spain) ; MISE (Spain) ; STFC (UK) ; STFC (UK) ; HEFCE (UK) ; HEFCE (UK) ; NCSA(UIUC) ; NCSA(UIUC) ; KICP (U. Chicago) ; KICP (U. Chicago) ; CCAPP (Ohio State) ; CCAPP (Ohio State) ; MIFPA (Texas AM University) ; MIFPA (Texas AM University) ; CNPQ ; CNPQ ; FAPERJ ; FAPERJ ; FINEP (Brazil) ; FINEP (Brazil) ; MINECO (Spain) ; MINECO (Spain) ; DFG (Germany) ; DFG (Germany) ; Argonne Lab ; Argonne Lab ; UC Santa Cruz ; UC Santa Cruz ; University of Cambridge ; University of Cambridge ; CIEMAT-Madrid ; CIEMAT-Madrid ; University of Chicago ; University of Chicago ; University College London ; University College London ; DES-Brazil Consortium ; DES-Brazil Consortium ; University of Edinburgh ; University of Edinburgh ; ETH Zurich ; ETH Zurich ; Fermilab ; Fermilab ; University of Illinois ; University of Illinois ; ICE (IEEC-CSIC) ; ICE (IEEC-CSIC) ; IFAE Barcelona ; IFAE Barcelona ; Lawrence Berkeley Lab ; Lawrence Berkeley Lab ; LMU Munchen ; LMU Munchen ; associated Excellence Cluster Universe ; associated Excellence Cluster Universe ; University of Michigan ; University of Michigan ; NSF's National Optical-Infrared Astronomy Research Laboratory ; NSF's National Optical-Infrared Astronomy Research Laboratory ; University of Nottingham ; University of Nottingham ; Ohio State University ; Ohio State University ; OzDES Membership Consortium University of Pennsylvania ; OzDES Membership Consortium University of Pennsylvania ; University of Portsmouth ; University of Portsmouth ; SLAC National Lab ; SLAC National Lab ; Stanford University ; Stanford University ; University of Sussex ; University of Sussex ; Texas AM University ; Texas AM University ; US Department of Energy, Office of Science, Office of High Energy Physics ; US Department of Energy, Office of Science, Office of High Energy Physics ; University of Chicago Provost's Scholar Award ; University of Chicago Provost's Scholar Award ; NSF ; NSF ; CONICYT FONDECYT Regular grant ; CONICYT FONDECYT Regular grant ; NASA Fermi Guest Investigator Program Cycle 9 ; NASA Fermi Guest Investigator Program Cycle 9 ; Fermilab LDRD project ; Fermilab LDRD project ; DOE (USA) ; DOE (USA) ; NSF (USA) ; NSF (USA) ; MISE (Spain) ; MISE (Spain) ; STFC (UK) ; STFC (UK) ; HEFCE (UK) ; HEFCE (UK) ; NCSA(UIUC) ; NCSA(UIUC) ; KICP (U. Chicago) ; KICP (U. Chicago) ; CCAPP (Ohio State) ; CCAPP (Ohio State) ; MIFPA (Texas AM University) ; MIFPA (Texas AM University) ; CNPQ ; CNPQ ; FAPERJ ; FAPERJ ; FINEP (Brazil) ; FINEP (Brazil) ; MINECO (Spain) ; MINECO (Spain) ; DFG (Germany) ; DFG (Germany) ; Argonne Lab ; Argonne Lab ; UC Santa Cruz ; UC Santa Cruz ; University of Cambridge ; University of Cambridge ; CIEMAT-Madrid ; CIEMAT-Madrid ; University of Chicago ; University of Chicago ; University College London ; University College London ; DES-Brazil Consortium ; DES-Brazil Consortium ; University of Edinburgh ; University of Edinburgh ; ETH Zurich ; ETH Zurich ; Fermilab ; Fermilab ; University of Illinois ; University of Illinois ; ICE (IEEC-CSIC) ; ICE (IEEC-CSIC) ; IFAE Barcelona ; IFAE Barcelona ; Lawrence Berkeley Lab ; Lawrence Berkeley Lab ; LMU Munchen ; LMU Munchen ; associated Excellence Cluster Universe ; associated Excellence Cluster Universe ; University of Michigan ; University of Michigan ; NSF's National Optical-Infrared Astronomy Research Laboratory ; NSF's National Optical-Infrared Astronomy Research Laboratory ; University of Nottingham ; University of Nottingham ; Ohio State University ; Ohio State University ; OzDES Membership Consortium University of Pennsylvania ; OzDES Membership Consortium University of Pennsylvania ; University of Portsmouth ; University of Portsmouth ; SLAC National Lab ; SLAC National Lab ; Stanford University ; Stanford University ; University of Sussex ; University of Sussex ; Texas AM University ; Texas AM University ; US Department of Energy, Office of Science, Office of High Energy Physics ; US Department of Energy, Office of Science, Office of High Energy Physics ; University of Chicago Provost's Scholar Award ; University of Chicago Provost's Scholar Award ; NSF ; NSF ; CONICYT FONDECYT Regular grant ; CONICYT FONDECYT Regular grant ; NASA Fermi Guest Investigator Program Cycle 9 ; NASA Fermi Guest Investigator Program Cycle 9 ; Fermilab LDRD project ; Fermilab LDRD project ; DOE (USA) ; DOE (USA) ; NSF (USA) ; NSF (USA) ; MISE (Spain) ; MISE (Spain) ; STFC (UK) ; STFC (UK) ; HEFCE (UK) ; HEFCE (UK) ; NCSA(UIUC) ; NCSA(UIUC) ; KICP (U. Chicago) ; KICP (U. Chicago) ; CCAPP (Ohio State) ; CCAPP (Ohio State) ; MIFPA (Texas AM University) ; MIFPA (Texas AM University) ; CNPQ ; CNPQ ; FAPERJ ; FAPERJ ; FINEP (Brazil) ; FINEP (Brazil) ; MINECO (Spain) ; MINECO (Spain) ; DFG (Germany) ; DFG (Germany) ; Argonne Lab ; Argonne Lab ; UC Santa Cruz ; UC Santa Cruz ; University of Cambridge ; University of Cambridge ; CIEMAT-Madrid ; CIEMAT-Madrid ; University of Chicago ; University of Chicago ; University College London ; University College London ; DES-Brazil Consortium ; DES-Brazil Consortium ; University of Edinburgh ; University of Edinburgh ; ETH Zurich ; ETH Zurich ; Fermilab ; Fermilab ; University of Illinois ; University of Illinois ; ICE (IEEC-CSIC) ; ICE (IEEC-CSIC) ; IFAE Barcelona ; IFAE Barcelona ; Lawrence Berkeley Lab ; Lawrence Berkeley Lab ; LMU Munchen ; LMU Munchen ; associated Excellence Cluster Universe ; associated Excellence Cluster Universe ; University of Michigan ; University of Michigan ; NSF's National Optical-Infrared Astronomy Research Laboratory ; NSF's National Optical-Infrared Astronomy Research Laboratory ; University of Nottingham ; University of Nottingham ; Ohio State University ; Ohio State University ; OzDES Membership Consortium University of Pennsylvania ; OzDES Membership Consortium University of Pennsylvania ; University of Portsmouth ; University of Portsmouth ; SLAC National Lab ; SLAC National Lab ; Stanford University ; Stanford University ; University of Sussex ; University of Sussex ; Texas AM University ; Texas AM University ; US Department of Energy, Office of Science, Office of High Energy Physics ; US Department of Energy, Office of Science, Office of High Energy Physics |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/55537]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Mau, S. |
| 作者单位 | 1.Univ Tor Vergata, Rome, Italy 2.Gran Sasso Sci Inst, Laquila, Italy 3.Ist Nazl Fis Nucl, Frascati, Italy 4.Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA 5.Univ Alabama, Space Sci Dept, Huntsville, AL 35899 USA 6.Univ Space Res Assoc, Sci & Technol Inst, Huntsville, AL USA 7.NASA, Astrophys Branch, ST12, Marshall Space Flight Ctr, Huntsville, AL USA 8.Max Planck Inst Extraterr Phys, Garching, Germany 9.Kanazawa Univ, Inst Sci & Engn, Fac Math & Phys, Kanazawa, Ishikawa, Japan 10.Univ Maryland, Dept Phys, College Pk, MD 20742 USA |
| 推荐引用方式 GB/T 7714 | Mau, S.,Cerny, W.,Pace, A. B.,et al. Two Ultra-faint Milky Way Stellar Systems Discovered in Early Data from the DECam Local Volume Exploration Survey[J]. ASTROPHYSICAL JOURNAL,2020,890(2):12. |
| APA | Mau, S..,Cerny, W..,Pace, A. B..,Choi, Y..,Drlica-Wagner, A..,...&Wechsler, R. H..(2020).Two Ultra-faint Milky Way Stellar Systems Discovered in Early Data from the DECam Local Volume Exploration Survey.ASTROPHYSICAL JOURNAL,890(2),12. |
| MLA | Mau, S.,et al."Two Ultra-faint Milky Way Stellar Systems Discovered in Early Data from the DECam Local Volume Exploration Survey".ASTROPHYSICAL JOURNAL 890.2(2020):12. |
入库方式： OAI收割
来源：国家天文台
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