TY - JOUR
T1 - The LBT satellites of Nearby Galaxies Survey (LBT-SONG)
T2 - The satellite population of NGC 628
AU - Bianca Davis, A.
AU - Nierenberg, Anna M.
AU - Peter, Annika H.G.
AU - Garling, Christopher T.
AU - Greco, Johnny P.
AU - Kochanek, Christopher S.
AU - Utomo, Dyas
AU - Casey, Kirsten J.
AU - Pogge, Richard W.
AU - Roberts, Daniella M.
AU - Sand, David J.
AU - Sardone, Amy
N1 - Publisher Copyright:
© 2021 Oxford University Press. All rights reserved.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - We present the first satellite system of the Large Binocular Telescope Satellites Of Nearby Galaxies Survey (LBT-SONG), a survey to characterize the close satellite populations of LargeMagellanic Cloud to Milky-Way-mass, star-forming galaxies in the Local Volume. In this paper, we describe our unresolved diffuse satellite finding and completeness measurement methodology and apply this framework to NGC 628, an isolated galaxy with∼1/4 the stellarmass of the MilkyWay.We present two new dwarf satellite galaxy candidates: NGC 628 dwA, and dwB with MV = -12.2 and -7.7, respectively. NGC 628 dwA is a classical dwarf while NGC 628 dwB is a low-luminosity galaxy that appears to have been quenched after reionization. Completeness corrections indicate that the presence of these two satellites is consistent with CDM predictions. The satellite colours indicate that the galaxies are neither actively star forming nor do they have the purely ancient stellar populations characteristic of ultrafaint dwarfs. Instead, and consistent with our previous work on the NGC 4214 system, they show signs of recent quenching, further indicating that environmental quenching can play a role in modifying satellite populations even for hosts smaller than the Milky Way.
AB - We present the first satellite system of the Large Binocular Telescope Satellites Of Nearby Galaxies Survey (LBT-SONG), a survey to characterize the close satellite populations of LargeMagellanic Cloud to Milky-Way-mass, star-forming galaxies in the Local Volume. In this paper, we describe our unresolved diffuse satellite finding and completeness measurement methodology and apply this framework to NGC 628, an isolated galaxy with∼1/4 the stellarmass of the MilkyWay.We present two new dwarf satellite galaxy candidates: NGC 628 dwA, and dwB with MV = -12.2 and -7.7, respectively. NGC 628 dwA is a classical dwarf while NGC 628 dwB is a low-luminosity galaxy that appears to have been quenched after reionization. Completeness corrections indicate that the presence of these two satellites is consistent with CDM predictions. The satellite colours indicate that the galaxies are neither actively star forming nor do they have the purely ancient stellar populations characteristic of ultrafaint dwarfs. Instead, and consistent with our previous work on the NGC 4214 system, they show signs of recent quenching, further indicating that environmental quenching can play a role in modifying satellite populations even for hosts smaller than the Milky Way.
KW - Galaxies: Dwarf
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U2 - 10.1093/mnras/staa3246
DO - 10.1093/mnras/staa3246
M3 - Article
AN - SCOPUS:85098545547
SN - 0035-8711
VL - 500
SP - 3854
EP - 3869
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -