Abstract
We report the discovery of a ⪆1° (∼50 kpc) long stellar tidal stream emanating from the dwarf galaxy DDO 44, a likely satellite of Local Volume galaxy NGC 2403 located ∼70 kpc in projection from its companion. NGC 2403 is a roughly Large Magellanic Cloud (LMC) stellar-mass galaxy 3 Mpc away, residing at the outer limits of the M81 group. We are mapping a large region around NGC 2403 as part of our Magellanic Analogs' Dwarf Companions and Stellar Halos survey, reaching point-source depths (90% completeness) of (g, i) = (26.5, 26.2). Density maps of old, metal-poor RGB stars reveal tidal streams extending on two sides of DDO 44, with the streams directed toward NGC 2403. We estimate total luminosities of the original DDO 44 system (dwarf and streams combined) to be M i,tot = -13.4 and M g,tot = -12.6, with ∼25%-30% of the luminosity in the streams. Analogs of ∼LMC-mass hosts with massive tidally disrupting satellites are rare in the Illustris simulations, especially at large separations such as that of DDO 44. The few analogs that are present in the models suggest that even low-mass hosts can efficiently quench their massive satellites.
| Original language | English (US) |
|---|---|
| Article number | 109 |
| Journal | Astrophysical Journal |
| Volume | 886 |
| Issue number | 2 |
| DOIs | |
| State | Published - Dec 1 2019 |
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
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In: Astrophysical Journal, Vol. 886, No. 2, 109, 01.12.2019.
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Tidal Destruction in a Low-mass Galaxy Environment
T2 - The Discovery of Tidal Tails around DDO 44
AU - Carlin, Jeffrey L.
AU - Garling, Christopher T.
AU - Peter, Annika H.G.
AU - Crnojević, Denija
AU - Forbes, Duncan A.
AU - Hargis, Jonathan R.
AU - Mutlu-Pakdil, Burçin
AU - Pucha, Ragadeepika
AU - Romanowsky, Aaron J.
AU - Sand, David J.
AU - Spekkens, Kristine
AU - Strader, Jay
AU - Willman, Beth
N1 - Funding Information: Jeffrey L. Carlin Christopher T. Garling Annika H. G. Peter Denija Crnojević Duncan A. Forbes Jonathan R. Hargis Bur�in Mutlu-Pakdil Ragadeepika Pucha Aaron J. Romanowsky David J. Sand Kristine Spekkens Jay Strader Beth Willman Jeffrey L. Carlin Christopher T. Garling Annika H. G. Peter Denija Crnojević Duncan A. Forbes Jonathan R. Hargis Bur�in Mutlu-Pakdil Ragadeepika Pucha Aaron J. Romanowsky David J. Sand Kristine Spekkens Jay Strader Beth Willman LSST, 950 North Cherry Avenue, Tucson, AZ 85719, USA CCAPP and Department of Astronomy, The Ohio State University, Columbus, OH 43210, USA CCAPP, Department of Physics, and Department of Astronomy, The Ohio State University, Columbus, OH 43210, USA University of Tampa, 401 West Kennedy Boulevard, Tampa, FL 33606, USA Centre for Astrophysics and Supercomputing, Swinburne University, Hawthorn VIC 3122, Australia Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA Department of Astronomy/Steward Observatory, 933 North Cherry Avenue, Rm. N204, Tucson, AZ 85721-0065, USA University of California Observatories, 1156 High Street, Santa Cruz, CA 95064, USA Department of Physics & Astronomy, San Jos� State University, One Washington Square, San Jose, CA 95192, USA Department of Physics, Engineering Physics and Astronomy, Queen’s University, Kingston, Ontario, K7L 3N6, Canada Department of Physics, Royal Military College of Canada, P.O. Box 17000, Station Forces, Kingston, ON K7L 7B4, Canada Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Association of Universities for Research in Astronomy, 950 North Cherry Avenue, Tucson, AZ 85719, USA Jeffrey L. Carlin, Christopher T. Garling, Annika H. G. Peter, Denija Crnojević, Duncan A. Forbes, Jonathan R. Hargis, Bur�in Mutlu-Pakdil, Ragadeepika Pucha, Aaron J. Romanowsky, David J. Sand, Kristine Spekkens, Jay Strader and Beth Willman 2019-12-01 2019-11-26 15:08:10 cgi/release: Article released bin/incoming: New from .zip National Science Foundation AST-1816196 yes We report the discovery of a ≳1� (∼50 kpc) long stellar tidal stream emanating from the dwarf galaxy DDO�44, a likely satellite of Local Volume galaxy NGC�2403 located ∼70�kpc in projection from its companion. NGC�2403 is a roughly Large Magellanic Cloud (LMC) stellar-mass galaxy 3 Mpc away, residing at the outer limits of the M81 group. We are mapping a large region around NGC�2403 as part of our Magellanic Analogs’ Dwarf Companions and Stellar Halos survey, reaching point-source depths (90% completeness) of ( g , i )�=�(26.5, 26.2). Density maps of old, metal-poor RGB stars reveal tidal streams extending on two sides of DDO�44, with the streams directed toward NGC�2403. We estimate total luminosities of the original DDO�44 system (dwarf and streams combined) to be M i ,tot �=�−13.4 and M g ,tot �=�−12.6, with ∼25%–30% of the luminosity in the streams. Analogs of ∼LMC-mass hosts with massive tidally disrupting satellites are rare in the Illustris simulations, especially at large separations such as that of DDO�44. The few analogs that are present in the models suggest that even low-mass hosts can efficiently quench their massive satellites. � 2019. The American Astronomical Society. All rights reserved. Aihara H., Arimoto N., Armstrong R. et al 2018a PASJ 70 S4 10.1093/pasj/psx066 Aihara H., Arimoto N., Armstrong R. et al PASJ 0004-6264 70 2018 S4 Aihara H., Armstrong R., Bickerton S. et al 2018b PASJ 70 S8 10.1093/pasj/psx081 Aihara H., Armstrong R., Bickerton S. et al PASJ 0004-6264 70 2018 S8 Alonso-García J., Mateo M. and Aparicio A. 2006 PASP 118 580 10.1086/502984 Alonso-García J., Mateo M. and Aparicio A. 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PY - 2019/12/1
Y1 - 2019/12/1
N2 - We report the discovery of a ⪆1° (∼50 kpc) long stellar tidal stream emanating from the dwarf galaxy DDO 44, a likely satellite of Local Volume galaxy NGC 2403 located ∼70 kpc in projection from its companion. NGC 2403 is a roughly Large Magellanic Cloud (LMC) stellar-mass galaxy 3 Mpc away, residing at the outer limits of the M81 group. We are mapping a large region around NGC 2403 as part of our Magellanic Analogs' Dwarf Companions and Stellar Halos survey, reaching point-source depths (90% completeness) of (g, i) = (26.5, 26.2). Density maps of old, metal-poor RGB stars reveal tidal streams extending on two sides of DDO 44, with the streams directed toward NGC 2403. We estimate total luminosities of the original DDO 44 system (dwarf and streams combined) to be M i,tot = -13.4 and M g,tot = -12.6, with ∼25%-30% of the luminosity in the streams. Analogs of ∼LMC-mass hosts with massive tidally disrupting satellites are rare in the Illustris simulations, especially at large separations such as that of DDO 44. The few analogs that are present in the models suggest that even low-mass hosts can efficiently quench their massive satellites.
AB - We report the discovery of a ⪆1° (∼50 kpc) long stellar tidal stream emanating from the dwarf galaxy DDO 44, a likely satellite of Local Volume galaxy NGC 2403 located ∼70 kpc in projection from its companion. NGC 2403 is a roughly Large Magellanic Cloud (LMC) stellar-mass galaxy 3 Mpc away, residing at the outer limits of the M81 group. We are mapping a large region around NGC 2403 as part of our Magellanic Analogs' Dwarf Companions and Stellar Halos survey, reaching point-source depths (90% completeness) of (g, i) = (26.5, 26.2). Density maps of old, metal-poor RGB stars reveal tidal streams extending on two sides of DDO 44, with the streams directed toward NGC 2403. We estimate total luminosities of the original DDO 44 system (dwarf and streams combined) to be M i,tot = -13.4 and M g,tot = -12.6, with ∼25%-30% of the luminosity in the streams. Analogs of ∼LMC-mass hosts with massive tidally disrupting satellites are rare in the Illustris simulations, especially at large separations such as that of DDO 44. The few analogs that are present in the models suggest that even low-mass hosts can efficiently quench their massive satellites.
UR - http://www.scopus.com/inward/record.url?scp=85077227912&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85077227912&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/ab4c32
DO - 10.3847/1538-4357/ab4c32
M3 - Article
AN - SCOPUS:85077227912
SN - 0004-637X
VL - 886
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 109
ER -