Journal article
AGC 226178 and NGVS 3543: Two Deceptive Dwarfs toward Virgo
Astrophysical journal. Letters, Vol.926(2), p.L15
02/01/2022
DOI: 10.3847/2041-8213/ac51dc
Abstract
The two sources AGC 226178 and NGVS 3543, an extremely faint, clumpy, blue stellar system and a low surface brightness dwarf spheroidal, are adjacent systems in the direction of the Virgo cluster. Both have been studied in detail previously, with it being suggested that they are unrelated normal dwarf galaxies or that NGVS 3543 recently lost its gas through ram pressure stripping and AGC 226178 formed from this stripped gas. However, with Hubble Space Telescope Advanced Camera for Surveys imaging, we demonstrate that the stellar population of NGVS 3543 is inconsistent with being at the distance of the Virgo cluster and that it is likely a foreground object at approximately 10 Mpc, whereas the stellar population of AGC 226178 is consistent with it being a very young (10-100 Myr) object in the Virgo cluster. Through a reanalysis of the original ALFALFA H i detection, we show that AGC 226178 likely formed from gas stripped from the nearby dwarf galaxy VCC 2034, a hypothesis strengthened by the high metallicity measured with MUSE VLT observations. However, it is unclear whether ram pressure or a tidal interaction is responsible for stripping the gas. Object AGC 226178 is one of at least five similar objects now known toward Virgo. These objects are all young and unlikely to remain visible for over similar to 500 Myr, suggesting that they are continually produced in the cluster.
Details
- Title: Subtitle
- AGC 226178 and NGVS 3543: Two Deceptive Dwarfs toward Virgo
- Creators
- Michael G. Jones - University of ArizonaDavid J. Sand - University of ArizonaMichele Bellazzini - INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Gobetti 93-3, I-40129 Bologna, ItalyKristine Spekkens - Queen's UniversityJohn M. Cannon - Macalester CollegeBurcin Mutlu-Pakdil - University of ChicagoAnanthan Karunakaran - Queen's UniversityGiacomo Beccari - European Southern ObservatoryLaura Magrini - Arcetri Astrophysical ObservatoryGiovanni Cresci - Arcetri Astrophysical ObservatoryJohn L. Inoue - Macalester CollegeJackson Fuson - Macalester CollegeElizabeth A. K. Adams - Netherlands Institute for Radio AstronomyGiuseppina Battaglia - Instituto de Astrofísica de CanariasPaul Bennet - Space Telescope Science InstituteDenija Crnojevic - University of TampaNelson Caldwell - Center for Astrophysics Harvard & SmithsonianPuragra Guhathakurta - University of California, Santa CruzMartha P. Haynes - Cornell UniversityRicardo R. Munoz - University of ChileAnil Seth - University of UtahJay Strader - Michigan State UniversityElisa Toloba - University of the PacificDennis Zaritsky - University of Arizona
- Resource Type
- Journal article
- Publication Details
- Astrophysical journal. Letters, Vol.926(2), p.L15
- Publisher
- IOP Publishing Ltd
- DOI
- 10.3847/2041-8213/ac51dc
- ISSN
- 2041-8205
- eISSN
- 2041-8213
- Number of pages
- 13
- Grant note
- Max Planck Society AYA201789076-P / AEI/FEDER, UE Packard Foundation; The David & Lucile Packard Foundation NAS5-26555 / NASA; National Aeronautics & Space Administration (NASA) AST-1821967; 1813708; AST-1714828; AST 2009894; AST-1814208 / NSF; National Science Foundation (NSF) WISE research program - Dutch Research Council (NWO) 1.05.01.86.28 / INAF Main Stream grant Natural Sciences and Engineering Research Council of Canada (NSERC) U.S. Department of Energy; United States Department of Energy (DOE) National Aeronautics and Space Administration; National Aeronautics & Space Administration (NASA) Consejeria de Economia, Industria, Comercio y Conocimiento of the Canary Islands Autonomous Community Brinson Foundation Higher Education Funding Council for England; UK Research & Innovation (UKRI); Higher Education Funding Council for England (HEFCE) AST-2001663 / NSF Astronomy and Astrophysics Postdoctoral Fellowship; National Science Foundation (NSF) Japanese Monbukagakusho; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) SEV-2017-0709 / State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award; Spanish Government National Science Foundation; National Science Foundation (NSF) FB210003 / project ANID PIA/BASAL Ministerio de Ciencia, Innovacion y Universidades; Spanish Government HST-GO-15183 / NASA through a grant from the Space Telescope Science Institute; Space Telescope Science Institute 0101.B-0376A / European Organisation for Astronomical Research in the Southern Hemisphere under ESO program Alfred P. Sloan Foundation
- Language
- English
- Date published
- 02/01/2022
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984627300502771
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