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相关论文: A catalog of merging dwarf galaxies in the local u…

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We present results from a survey of dwarf galaxy candidates in the vicinity of strongly interacting galaxies. The goal of the survey was a test of the hypothesis that massive condensations of stars and HI in tidal tails of large interacting…

天体物理学 · 物理学 2011-05-23 E. J. Delgado-Donate , C. Munoz-Tunon , H. J. Deeg , J. Iglesias-Paramo

We use a complete, unbiased sample of 257 dwarf (10^8 MSun < Mstar < 10^9.5 MSun) galaxies at z < 0.08, in the COSMOS field, to study the morphological mix of the dwarf population in low-density environments. Visual inspection of extremely…

星系天体物理 · 物理学 2024-03-04 Ilin Lazar , Sugata Kaviraj , Aaron E. Watkins , Garreth Martin , Brian Bichang'a , Ryan A. Jackson

We present the results of our analysis of the frequencies of galaxies with tidal tails and M51-type galaxies in several deep fields of the Hubble Space Telescope (HDF-N, HDF-S, HUDF, GOODS, GEMS). In total, we have found about seven hundred…

宇宙学与河外天体物理 · 物理学 2015-05-30 V. P. Reshetnikov , Y. H. Mohamed

The Giant GAlaxies, Dwarfs, and Debris Survey concentrates on the nearby universe to study how galaxies have interacted in groups of different morphology, density, and richness. In these groups we select the dominant spiral galaxy and…

宇宙学与河外天体物理 · 物理学 2015-06-12 Johannes Ludwig , Anna Pasquali , Eva K. Grebel , John S. Gallagher

We study the properties of associations of dwarf galaxies and their dependence on the environment. Associations of dwarf galaxies are extended systems composed exclusively of dwarf galaxies, considering as dwarf galaxies those galaxies less…

Associations of dwarf galaxies are loose systems composed exclusively of dwarf galaxies. These systems were identified in the Local Volume for the first time more than thirty years ago. We study these systems in the cosmological framework…

We study galaxy pair samples selected from the Sloan Digital Sky Survey (SDSS-DR7) and we perform an analysis of minor and major mergers with the aim of investigating the dependence of galaxy properties on interactions. We build a galaxy…

宇宙学与河外天体物理 · 物理学 2015-06-03 Diego G. Lambas , Sol Alonso , Valeria Mesa , Ana Laura O'Mill

Like massive galaxies, dwarf galaxies are expected to undergo major mergers with other dwarfs. However, the end state of these mergers and the role that merging plays in regulating dwarf star formation is uncertain. Using imaging from the…

We present a case study of the tidal interaction between low mass, star-forming, galaxies initially found exploring the Sloan Digital Sky Survey (SDSS) images and further analyzed with SDSS spectroscopy and UV GALEX photometry. With a…

星系天体物理 · 物理学 2015-06-23 Sanjaya Paudel , P. A. Duc , C. H. Ree

Hubble Space Telescope Advanced Cameras for Surveys has been used to determine accurate distances for 20 galaxies from measurements of the luminosity of the brightest red giant branch stars. Five associations of dwarf galaxies that had…

天体物理学 · 物理学 2008-11-26 R B Tully , L Rizzi , A E Dolphin , I D Karachentsev , V E Karachentseva , D I Makarov , L Makarova , S Sakai , E J Shaya

We present the results from our program to determine the evolution of the galaxy interaction/merger rate with redshift using the unique star-forming characteristics of collisional ring galaxies. We have identified 25 distant collisional…

天体物理学 · 物理学 2009-11-10 R. J. Lavery , A. Remijan , V. Charmandaris , R. D. Hayes , A. A. Ring

Galaxy evolution by interaction driven transformation is probably highly efficient in groups of galaxies. Dwarf galaxies with their shallow potential are expected to reflect the interaction most prominently in their observable structure.…

星系天体物理 · 物理学 2015-06-22 U. Hopp , J. Vennik

According to the $\Lambda$ cold dark matter model of galaxy formation, the hierarchical assembly process is scale-free and interactions between galaxies in all mass ranges are expected. The effects of interactions between dwarf galaxies on…

星系天体物理 · 物理学 2023-12-27 Smitha Subramanian , Chayan Mondal , Venu Kalari

We present the photometric properties of 2210 newly identified dwarf galaxy candidates in the MATLAS fields. The Mass Assembly of early Type gaLAxies with their fine Structures (MATLAS) deep imaging survey mapped $\sim$142 deg$^2$ of the…

We present the rest-frame optical galaxy merger fraction between 0.2<z<1.2, as a function of stellar mass and optical luminosity, as observed by the Canada-France-Hawaii Telescope Legacy Deep Survey (CFHTLS-Deep). We developed a new…

宇宙学与河外天体物理 · 物理学 2015-05-18 Carrie R. Bridge , Raymond G. Carlberg , Mark Sullivan

We investigate the merger histories of isolated dwarf galaxies based on a suite of 15 high-resolution cosmological zoom-in simulations, all with masses of $M_{\rm halo} \approx 10^{10}\,{\rm M}_{\odot}$ (and M$_\star\sim10^5-10^7\,{\rm…

We use N-body cosmological simulations and empirical galaxy models to study the merger history of dwarf-mass galaxies (with M_halo~10^10 M_Sun). Our input galaxy models describe the stellar mass-halo mass relation, and the galaxy occupation…

星系天体物理 · 物理学 2022-01-04 Alis J. Deason , Sownak Bose , Azadeh Fattahi , Nicola C. Amorisco , Wojciech Hellwing , Carlos S. Frenk

We present deep optical B, V, R images of a sample of 10 interacting systems which were selected for their resemblance to disturbed galaxies at high redshift. Photometry is performed on knots in the tidal features of the galaxies. We…

天体物理学 · 物理学 2007-05-23 Peter M. Weilbacher , P. -A. Duc , U. Fritze-v. Alvensleben , P. Martin , K. J. Fricke

This paper is the first part in our series on the influence of tidal interactions and minor mergers on the radial and vertical disk structure of spiral galaxies. We report on the sample selection, our observations, and data reduction.…

天体物理学 · 物理学 2010-01-25 U. Schwarzkopf , R. -J. Dettmar

We study a sample of nearby (z~0.2) low-luminosity dwarf (10^7 MSun < M* < 10^8 MSun) galaxies which have extreme (0.1 - 3 MSun/yr) star formation rates (SFRs) for this mass regime, making them plausible analogues of dwarfs at z~5.5. We…

星系天体物理 · 物理学 2025-06-05 S. Kaviraj , B. Bichang'a , I. Lazar , A. E. Watkins , G. Martin , R. A. Jackson
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