KMTNet Nearby Galaxy Survey II. Searching for Dwarf Galaxies in Deep and Wide-field Images of the NGC 1291 System

Woowon Byun; Yun Kyeong Sheen; Hong Soo Park; Luis C. Ho; Joon Hyeop Lee; Sang Chul Kim; Hyunjin Jeong; Byeong Gon Park; Kwang Il Seon; Youngdae Lee; Yongseok Lee; Sang Mok Cha; Jongwan Ko; Minjin Kim

doi:10.3847/1538-4357/ab6f6e

KMTNet Nearby Galaxy Survey II. Searching for Dwarf Galaxies in Deep and Wide-field Images of the NGC 1291 System

Woowon Byun, Yun Kyeong Sheen, Hong Soo Park, Luis C. Ho, Joon Hyeop Lee, Sang Chul Kim, Hyunjin Jeong, Byeong Gon Park, Kwang Il Seon, Youngdae Lee, Yongseok Lee, Sang Mok Cha, Jongwan Ko, Minjin Kim

School of Earth System Sciences

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We present newly discovered dwarf galaxy candidates in deep and wide-field images of NGC 1291 obtained with the Korea Microlensing Telescope Network. We identify 15 dwarf galaxy candidates by visual inspection. Using imaging simulations, we demonstrate that the completeness rate of our detection is greater than 70% for the central surface-brightness value of μ _0,R ≲ 26 mag arcsec^-2 and for magnitudes M _R ≲ -10 mag. The structural and photometric properties of the dwarf galaxy candidates appear to be broadly consistent with those of ordinary dwarf galaxies in nearby groups and clusters, with μ _0,R ∼ 22.5 to 26.5 mag arcsec^-2 and effective radii of 200 pc to 1 kpc. The dwarf galaxy candidates show a concentration toward NGC 1291 and tend to be redder the closer they are to the center, possibly indicating that they are associated with NGC 1291. The dwarf candidates presented in this paper appear to be bluer than those in denser environments, revealing that the quenching of star formation in dwarf galaxies is susceptible to the environment, while the morphology shaping is not.

Original language	English
Article number	18
Journal	Astrophysical Journal
Volume	891
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/ab6f6e
State	Published - 1 Mar 2020

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@article{9fa96a5904634ceaa03e96070b208ece,

title = "KMTNet Nearby Galaxy Survey II. Searching for Dwarf Galaxies in Deep and Wide-field Images of the NGC 1291 System",

abstract = "We present newly discovered dwarf galaxy candidates in deep and wide-field images of NGC 1291 obtained with the Korea Microlensing Telescope Network. We identify 15 dwarf galaxy candidates by visual inspection. Using imaging simulations, we demonstrate that the completeness rate of our detection is greater than 70% for the central surface-brightness value of μ 0,R ≲ 26 mag arcsec-2 and for magnitudes M R ≲ -10 mag. The structural and photometric properties of the dwarf galaxy candidates appear to be broadly consistent with those of ordinary dwarf galaxies in nearby groups and clusters, with μ 0,R ∼ 22.5 to 26.5 mag arcsec-2 and effective radii of 200 pc to 1 kpc. The dwarf galaxy candidates show a concentration toward NGC 1291 and tend to be redder the closer they are to the center, possibly indicating that they are associated with NGC 1291. The dwarf candidates presented in this paper appear to be bluer than those in denser environments, revealing that the quenching of star formation in dwarf galaxies is susceptible to the environment, while the morphology shaping is not.",

author = "Woowon Byun and Sheen, {Yun Kyeong} and Park, {Hong Soo} and Ho, {Luis C.} and Lee, {Joon Hyeop} and Kim, {Sang Chul} and Hyunjin Jeong and Park, {Byeong Gon} and Seon, {Kwang Il} and Youngdae Lee and Yongseok Lee and Cha, {Sang Mok} and Jongwan Ko and Minjin Kim",

year = "2020",

month = mar,

day = "1",

doi = "10.3847/1538-4357/ab6f6e",

language = "English",

volume = "891",

journal = "Astrophysical Journal",

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publisher = "American Astronomical Society",

number = "1",

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TY - JOUR

T1 - KMTNet Nearby Galaxy Survey II. Searching for Dwarf Galaxies in Deep and Wide-field Images of the NGC 1291 System

AU - Byun, Woowon

AU - Sheen, Yun Kyeong

AU - Park, Hong Soo

AU - Ho, Luis C.

AU - Lee, Joon Hyeop

AU - Kim, Sang Chul

AU - Jeong, Hyunjin

AU - Park, Byeong Gon

AU - Seon, Kwang Il

AU - Lee, Youngdae

AU - Lee, Yongseok

AU - Cha, Sang Mok

AU - Ko, Jongwan

AU - Kim, Minjin

PY - 2020/3/1

Y1 - 2020/3/1

N2 - We present newly discovered dwarf galaxy candidates in deep and wide-field images of NGC 1291 obtained with the Korea Microlensing Telescope Network. We identify 15 dwarf galaxy candidates by visual inspection. Using imaging simulations, we demonstrate that the completeness rate of our detection is greater than 70% for the central surface-brightness value of μ 0,R ≲ 26 mag arcsec-2 and for magnitudes M R ≲ -10 mag. The structural and photometric properties of the dwarf galaxy candidates appear to be broadly consistent with those of ordinary dwarf galaxies in nearby groups and clusters, with μ 0,R ∼ 22.5 to 26.5 mag arcsec-2 and effective radii of 200 pc to 1 kpc. The dwarf galaxy candidates show a concentration toward NGC 1291 and tend to be redder the closer they are to the center, possibly indicating that they are associated with NGC 1291. The dwarf candidates presented in this paper appear to be bluer than those in denser environments, revealing that the quenching of star formation in dwarf galaxies is susceptible to the environment, while the morphology shaping is not.

AB - We present newly discovered dwarf galaxy candidates in deep and wide-field images of NGC 1291 obtained with the Korea Microlensing Telescope Network. We identify 15 dwarf galaxy candidates by visual inspection. Using imaging simulations, we demonstrate that the completeness rate of our detection is greater than 70% for the central surface-brightness value of μ 0,R ≲ 26 mag arcsec-2 and for magnitudes M R ≲ -10 mag. The structural and photometric properties of the dwarf galaxy candidates appear to be broadly consistent with those of ordinary dwarf galaxies in nearby groups and clusters, with μ 0,R ∼ 22.5 to 26.5 mag arcsec-2 and effective radii of 200 pc to 1 kpc. The dwarf galaxy candidates show a concentration toward NGC 1291 and tend to be redder the closer they are to the center, possibly indicating that they are associated with NGC 1291. The dwarf candidates presented in this paper appear to be bluer than those in denser environments, revealing that the quenching of star formation in dwarf galaxies is susceptible to the environment, while the morphology shaping is not.

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DO - 10.3847/1538-4357/ab6f6e

M3 - Article

AN - SCOPUS:85084597538

SN - 0004-637X

VL - 891

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 18

ER -

KMTNet Nearby Galaxy Survey II. Searching for Dwarf Galaxies in Deep and Wide-field Images of the NGC 1291 System

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