Ultrafaint Dwarf Galaxy Candidates in the M81 Group: Signatures of Group Accretion
نویسندگان
چکیده
The faint and ultrafaint dwarf galaxies in the Local Group form observational bedrock upon which our understanding of small-scale cosmology rests. In order to understand whether this insight generalizes, it is imperative use resolved-star techniques discover similarly satellites nearby galaxy groups. We describe search for M81 group using deep ground-based data sets from Subaru's Hyper Suprime-Cam. present one new identify five additional extremely low surface brightness candidate dwarfs that reach into regime $M_V \sim -6$ (similar current limits Andromeda satellites). These candidates' luminosities sizes are similar known Tucana B, Canes Venatici I, Hercules, Bo\"otes I. Most these candidates likely be real, based on tests blank fields. Intriguingly, all spatially clustered around NGC 3077, itself an satellite advanced state tidal disruption. This somewhat surprising, as its largest M82 both substantially more massive than 3077 by virtue their greater masses, would have been expected host many or candidates. results lend considerable support idea important contribution growth populations Milky Way-mass galaxies.
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چکیده پایان نامه (شامل خلاصه، اهداف، روش های اجرا و نتایج به دست آمده): کار جمع آوری گو یش های محلی در سال های اخیر شتاب امیدوار کننده ای به خود گرفته است. شاید از بارزترین اهداف جمع آوری گویش های مختلف، ثبت و ضبط آن، جلوگیری از نابودی و مهمتر از همه حل مشکلات دستوری زبان رسمی باشد. دقت در فرآیند های زبانی گویش های محلی نوع ارتباط مردم نواحی مختلف با پیرامون نشان را به ما نشان خواهد داد. از س...
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ژورنال
عنوان ژورنال: The astrophysical journal
سال: 2022
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/2041-8213/ac8e5e