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Faint satellite population of the NGC-3175 Group – a Local Group analogue

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Faint satellite population of the NGC-3175 Group – a Local Group analogue. / Kondapally, Rohit; Russell, George A.; Conselice, Christopher J.; Penny, Samantha J.

In: Monthly Notices of the Royal Astronomical Society, Vol. 481, No. 2, 01.12.2018, p. 1759–1773.

Research output: Contribution to journalArticle

Harvard

Kondapally, R, Russell, GA, Conselice, CJ & Penny, SJ 2018, 'Faint satellite population of the NGC-3175 Group – a Local Group analogue', Monthly Notices of the Royal Astronomical Society, vol. 481, no. 2, pp. 1759–1773. https://doi.org/10.1093/mnras/sty2333

APA

Kondapally, R., Russell, G. A., Conselice, C. J., & Penny, S. J. (2018). Faint satellite population of the NGC-3175 Group – a Local Group analogue. Monthly Notices of the Royal Astronomical Society, 481(2), 1759–1773. https://doi.org/10.1093/mnras/sty2333

Vancouver

Kondapally R, Russell GA, Conselice CJ, Penny SJ. Faint satellite population of the NGC-3175 Group – a Local Group analogue. Monthly Notices of the Royal Astronomical Society. 2018 Dec 1;481(2):1759–1773. https://doi.org/10.1093/mnras/sty2333

Author

Kondapally, Rohit ; Russell, George A. ; Conselice, Christopher J. ; Penny, Samantha J. / Faint satellite population of the NGC-3175 Group – a Local Group analogue. In: Monthly Notices of the Royal Astronomical Society. 2018 ; Vol. 481, No. 2. pp. 1759–1773.

Bibtex

@article{b95b351677a34463a3ee8d3a68afb49f,
title = "Faint satellite population of the NGC-3175 Group – a Local Group analogue",
abstract = "In this paper, we identify and study the properties of low-mass dwarf satellites of a nearby Local Group analogue – the NGC-3175 galaxy group with the goal of investigating the nature of the lowest mass galaxies and the {\textquoteleft}Missing Satellites{\textquoteright} problem. Deep imaging of nearby groups such as NGC-3175 is one of the only ways to probe these low-mass galaxies which are important for problems in cosmology, dark matter and galaxy formation. We discover 553 candidate dwarf galaxies in the group, the vast majority of which have never been studied before. We obtained R and B band imaging, with the European Southern Observatory 2.2 m, around the central ∼500 kpc region of NGC-3175, allowing us to detect galaxies down to ∼23 mag (MB ∼ −7.7 mag) in the B band. In the absence of spectroscopic information, dwarf members and likely background galaxies are separated using colour, morphology, and surface brightness criteria. We compare the observed size, surface brightness, and mass scaling relations to literature data. The luminosity function with a faint end slope of α = −1.31, is steeper than that observed in the Local Group. In comparison with simulations, we find that our observations are between a pure Λ cold dark matter model and one involving baryonic effects, removing the apparent problem of finding too few satellites as seen around the Milky Way.",
keywords = "astro-ph.GA, astro-ph.CO, RCUK, STFC, ST/J501013/1, ST/L00075X/1, ST/K00042X/1, ST/H008519/1, ST/K003267/1",
author = "Rohit Kondapally and Russell, {George A.} and Conselice, {Christopher J.} and Penny, {Samantha J.}",
note = "18 pages, 12 figures, accepted for publication in MNRAS",
year = "2018",
month = dec
day = "1",
doi = "10.1093/mnras/sty2333",
language = "English",
volume = "481",
pages = "1759–1773",
journal = "MNRAS",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",

}

RIS

TY - JOUR

T1 - Faint satellite population of the NGC-3175 Group – a Local Group analogue

AU - Kondapally, Rohit

AU - Russell, George A.

AU - Conselice, Christopher J.

AU - Penny, Samantha J.

N1 - 18 pages, 12 figures, accepted for publication in MNRAS

PY - 2018/12/1

Y1 - 2018/12/1

N2 - In this paper, we identify and study the properties of low-mass dwarf satellites of a nearby Local Group analogue – the NGC-3175 galaxy group with the goal of investigating the nature of the lowest mass galaxies and the ‘Missing Satellites’ problem. Deep imaging of nearby groups such as NGC-3175 is one of the only ways to probe these low-mass galaxies which are important for problems in cosmology, dark matter and galaxy formation. We discover 553 candidate dwarf galaxies in the group, the vast majority of which have never been studied before. We obtained R and B band imaging, with the European Southern Observatory 2.2 m, around the central ∼500 kpc region of NGC-3175, allowing us to detect galaxies down to ∼23 mag (MB ∼ −7.7 mag) in the B band. In the absence of spectroscopic information, dwarf members and likely background galaxies are separated using colour, morphology, and surface brightness criteria. We compare the observed size, surface brightness, and mass scaling relations to literature data. The luminosity function with a faint end slope of α = −1.31, is steeper than that observed in the Local Group. In comparison with simulations, we find that our observations are between a pure Λ cold dark matter model and one involving baryonic effects, removing the apparent problem of finding too few satellites as seen around the Milky Way.

AB - In this paper, we identify and study the properties of low-mass dwarf satellites of a nearby Local Group analogue – the NGC-3175 galaxy group with the goal of investigating the nature of the lowest mass galaxies and the ‘Missing Satellites’ problem. Deep imaging of nearby groups such as NGC-3175 is one of the only ways to probe these low-mass galaxies which are important for problems in cosmology, dark matter and galaxy formation. We discover 553 candidate dwarf galaxies in the group, the vast majority of which have never been studied before. We obtained R and B band imaging, with the European Southern Observatory 2.2 m, around the central ∼500 kpc region of NGC-3175, allowing us to detect galaxies down to ∼23 mag (MB ∼ −7.7 mag) in the B band. In the absence of spectroscopic information, dwarf members and likely background galaxies are separated using colour, morphology, and surface brightness criteria. We compare the observed size, surface brightness, and mass scaling relations to literature data. The luminosity function with a faint end slope of α = −1.31, is steeper than that observed in the Local Group. In comparison with simulations, we find that our observations are between a pure Λ cold dark matter model and one involving baryonic effects, removing the apparent problem of finding too few satellites as seen around the Milky Way.

KW - astro-ph.GA

KW - astro-ph.CO

KW - RCUK

KW - STFC

KW - ST/J501013/1

KW - ST/L00075X/1

KW - ST/K00042X/1

KW - ST/H008519/1

KW - ST/K003267/1

U2 - 10.1093/mnras/sty2333

DO - 10.1093/mnras/sty2333

M3 - Article

VL - 481

SP - 1759

EP - 1773

JO - MNRAS

JF - MNRAS

SN - 0035-8711

IS - 2

ER -

ID: 11684439