相关论文: Updated Information on the Local Group

Unveiling M33's Hidden Merger History: A Potential Population of Star Clusters on Retrograde Orbits

We report the discovery of a possible sub-population of stellar clusters that appear to follow retrograde orbits around the third largest galaxy in the Local Group, M33 (Triangulum). This spiral disk galaxy has apparently had a mostly…

星系天体物理 · 物理学 2025-07-21 Borja Anguiano , Geraint F. Lewis , Steven R. Majewski

The Local Group on FIRE: Dwarf galaxy populations across a suite of hydrodynamic simulations

We present a new set of high-resolution hydrodynamic cosmological zoom-in simulations that apply the Feedback In Realistic Environments (FIRE) physics to both Local Group (LG)-like and isolated Milky Way (MW)-like volumes (ten host systems…

星系天体物理 · 物理学 2019-05-22 Shea Garrison-Kimmel , Philip F. Hopkins , Andrew Wetzel , James S. Bullock , Michael Boylan-Kolchin , Dusan Keres , Claude-Andre Faucher-Giguere , Kareem El-Badry , Astrid Lamberts , Eliot Quataert , Robyn Sanderson

The dwarf galaxy satellite system of Centaurus A

Dwarf galaxy satellite systems are essential probes to test models of structure formation, making it necessary to establish a census of dwarf galaxies outside of our own Local Group. We present deep FORS2 VI band images from the ESO Very…

星系天体物理 · 物理学 2019-08-28 Oliver Müller , Marina Rejkuba , Marcel S. Pawlowski , Rodrigo Ibata , Federico Lelli , Michael Hilker , Helmut Jerjen

The faint outer regions of the Pegasus Dwarf Irregular galaxy: a much larger and undisturbed galaxy

We investigate the spatial extent and structure of the Pegasus dwarf irregular galaxy using deep, wide-field, multicolour CCD photometry from the Sloan Digital Sky Survey (SDSS) and new deep HI observations. We study an area of ~0.6 square…

星系天体物理 · 物理学 2015-05-14 Alexei Kniazev , Noah Brosch , G. Lyle Hoffman , Eva K. Grebel , Daniel B. Zucker , Simon A. Pustilnik

The Dark Energy Survey view of the Sagittarius stream: discovery of two faint stellar system candidates

We report the discovery of two new candidate stellar systems in the constellation of Cetus using the data from the first two years of the Dark Energy Survey (DES). The objects, DES J0111-1341 and DES J0225+0304, are located at a…

星系天体物理 · 物理学 2017-04-13 E. Luque , A. Pieres , B. Santiago , B. Yanny , A. K. Vivas , A. Queiroz , A. Drlica-Wagner , E. Morganson , E. Balbinot , J. L. Marshall , T. S. Li , A. Fausti Neto , L. N. da Costa , M. A. G. Maia , K. Bechtol , A. G. Kim , G. M. Bernstein , S. Dodelson , L. Whiteway , H. T. Diehl , D. A. Finley , T. Abbott , F. B. Abdalla , S. Allam , J. Annis , A. Benoit-Lévy , E. Bertin , D. Brooks , D. L. Burke , A. Carnero Rosell , M. Carrasco Kind , J. Carretero , C. E. Cunha , C. B. D'Andrea , S. Desai , P. Doel , A. E. Evrard , B. Flaugher , P. Fosalba , D. W. Gerdes , D. A. Goldstein , D. Gruen , R. A. Gruendl , G. Gutierrez , D. J. James , K. Kuehn , N. Kuropatkin , O. Lahav , P. Martini , R. Miquel , B. Nord , R. Ogando , A. A. Plazas , A. K. Romer , E. Sanchez , V. Scarpine , M. Schubnell , I. Sevilla-Noarbe , R. C. Smith , M. Soares-Santos , F. Sobreira , E. Suchyta , M. E. C. Swanson , G. Tarle , D. Thomas , A. R. Walker

Proper Motions and Orbits of Distant Local Group Dwarf Galaxies from a combination of Gaia and Hubble Data

We have determined the proper motions (PMs) of 12 dwarf galaxies in the Local Group (LG), ranging from the outer Milky Way (MW) halo to the edge of the LG. We used HST as the first and Gaia as the second epoch using the GaiaHub software.…

星系天体物理 · 物理学 2023-12-18 Paul Bennet , Ekta Patel , Sangmo Tony Sohn , Andres del Pino , Roeland P. van der Marel , Mattia Libralato , Laura L. Watkins , Antonio Aparicio , Gurtina Besla , Carme Gallart , Mark A. Fardal , Matteo Monelli , Elena Sacchi , Erik Tollerud , Daniel R. Weisz

A close look at the Centaurus A group of galaxies III. Recent star formation histories of late-type dwarfs around M83

We study the resolved stellar populations of dwarf galaxies in the nearby Centaurus A/M83 group of galaxies. Our goal is to characterize their evolutionary history and to investigate eventual similarities or differences with the dwarf…

宇宙学与河外天体物理 · 物理学 2015-05-27 D. Crnojević , E. K. Grebel , A. A. Cole

INT monitoring survey of Local Group dwarf galaxies: star formation history and chemical enrichment

The Local Group (LG) hosts many dwarf galaxies with diverse physical characteristics in terms of morphology, mass, star formation, and metallicity. To this end, LG can offer a unique site to tackle questions about the formation and…

星系天体物理 · 物理学 2021-01-27 Tahere Parto , Shahrzad Dehghani , Atefeh Javadi , Elham Saremi , Jacco Th. van Loon , Habib Khosroshahi , Mohammad Taghi Mirtorabi , Hedieh Abdollahi , Mahtab Gholami , Seyed Azim Hashemi , Mahdieh Navabi , Majedeh Noori , Sima Taefi Aghdam , Maryam Torki , Mahshid Vafaeizade

Euclid: Early Release Observations -- The star cluster systems of the Local Group dwarf galaxies IC 10 and NGC 6822

Star clusters are valuable indicators of galaxy evolution, offering insights into the buildup of stellar populations across cosmic time. Understanding intrinsic star cluster populations of dwarf galaxies is particularly important given…

星系天体物理 · 物理学 2026-02-18 J. M. Howell , A. M. N. Ferguson , S. S. Larsen , A. Lançon , F. Annibali , J. -C. Cuillandre , L. K. Hunt , D. Martínez-Delgado , D. Massari , T. Saifollahi , K. Voggel , B. Altieri , S. Andreon , N. Auricchio , C. Baccigalupi , M. Baldi , S. Bardelli , A. Biviano , E. Branchini , M. Brescia , J. Brinchmann , S. Camera , G. Cañas-Herrera , G. P. Candini , V. Capobianco , C. Carbone , J. Carretero , M. Castellano , G. Castignani , S. Cavuoti , A. Cimatti , C. Colodro-Conde , G. Congedo , C. J. Conselice , L. Conversi , Y. Copin , F. Courbin , H. M. Courtois , M. Cropper , A. Da Silva , H. Degaudenzi , G. De Lucia , F. Dubath , C. A. J. Duncan , X. Dupac , S. Dusini , S. Escoffier , M. Farina , R. Farinelli , F. Faustini , S. Ferriol , F. Finelli , M. Frailis , E. Franceschi , M. Fumana , S. Galeotta , K. George , B. Gillis , C. Giocoli , J. Gracia-Carpio , A. Grazian , F. Grupp , S. V. H. Haugan , H. Hoekstra , W. Holmes , F. Hormuth , A. Hornstrup , K. Jahnke , M. Jhabvala , E. Keihänen , S. Kermiche , B. Kubik , M. Kümmel , M. Kunz , H. Kurki-Suonio , A. M. C. Le Brun , D. Le Mignant , S. Ligori , P. B. Lilje , V. Lindholm , I. Lloro , G. Mainetti , D. Maino , E. Maiorano , O. Mansutti , O. Marggraf , M. Martinelli , N. Martinet , F. Marulli , R. J. Massey , E. Medinaceli , S. Mei , M. Melchior , Y. Mellier , M. Meneghetti , E. Merlin , G. Meylan , A. Mora , M. Moresco , L. Moscardini , R. Nakajima , C. Neissner , S. -M. Niemi , C. Padilla , S. Paltani , F. Pasian , K. Pedersen , W. J. Percival , V. Pettorino , S. Pires , G. Polenta , M. Poncet , L. A. Popa , F. Raison , A. Renzi , J. Rhodes , G. Riccio , E. Romelli , M. Roncarelli , R. Saglia , Z. Sakr , D. Sapone , B. Sartoris , M. Schirmer , P. Schneider , T. Schrabback , A. Secroun , G. Seidel , S. Serrano , P. Simon , C. Sirignano , G. Sirri , J. Skottfelt , L. Stanco , J. Steinwagner , P. Tallada-Crespí , A. N. Taylor , H. I. Teplitz , I. Tereno , S. Toft , R. Toledo-Moreo , F. Torradeflot , I. Tutusaus , L. Valenziano , J. Valiviita , T. Vassallo , Y. Wang , J. Weller , G. Zamorani , I. A. Zinchenko , J. Martín-Fleitas , V. Scottez

The Solar Motion Relative to the Local Group

New data on the membership of the Local Group, in conjunction with new and improved radial velocity data, are used to refine the derivation of the motion of the Sun relative to the Local Group (hereafter LG). The Sun is found to be moving…

天体物理学 · 物理学 2009-10-31 Stephane Courteau , Sidney van den Bergh

Search for dark matter annihilation signatures in H.E.S.S. observations of Dwarf Spheroidal Galaxies

Dwarf spheroidal galaxies of the Local Group are close satellites of the Milky Way characterized by a large mass-to-light ratio and are not expected to be the site of non-thermal high-energy gamma-ray emission or intense star formation.…

高能天体物理现象 · 物理学 2015-03-12 H. E. S. S. Collaboration , : , A. Abramowski , F. Aharonian , F. Ait Benkhali , A. G. Akhperjanian , E. Angüner , M. Backes , S. Balenderan , A. Balzer , A. Barnacka , Y. Becherini , J. Becker Tjus , D. Berge , S. Bernhard , K. Bernlöhr , E. Birsin , J. Biteau , M. Böttcher , C. Boisson , J. Bolmont , P. Bordas , J. Bregeon , F. Brun , P. Brun , M. Bryan , T. Bulik , S. Carrigan , S. Casanova , P. M. Chadwick , N. Chakraborty , R. Chalme-Calvet , R. C. G. Chaves , M. Chrétien , S. Colafrancesco , G. Cologna , J. Conrad , C. Couturier , Y. Cui , M. Dalton , I. D. Davids , B. Degrange , C. Deil , P. deWilt , A. Djannati-Ataï , W. Domainko , A. Donath , L. O'C. Drury , G. Dubus , K. Dutson , J. Dyks , M. Dyrda , T. Edwards , K. Egberts , P. Eger , P. Espigat , C. Farnier , S. Fegan , F. Feinstein , M. V. Fernandes , D. Fernandez , A. Fiasson , G. Fontaine , A. Förster , M. Füßling , S. Gabici , M. Gajdus , Y. A. Gallant , T. Garrigoux , G. Giavitto , B. Giebels , J. F. Glicenstein , D. Gottschall , A. Goudelis , M. -H. Grondin , M. Grudzińska , D. Hadsch , S. Häffner , J. Hahn , J. Harris , G. Heinzelmann , G. Henri , G. Hermann , O. Hervet , A. Hillert , J. A. Hinton , W. Hofmann , P. Hofverberg , M. Holler , D. Horns , A. Ivascenko , A. Jacholkowska , C. Jahn , M. Jamrozy , M. Janiak , F. Jankowsky , I. Jung , M. A. Kastendieck , K. Katarzyński , U. Katz , S. Kaufmann , B. Khélifi , M. Kieffer , S. Klepser , D. Klochkov , W. Kluźniak , D. Kolitzus , Nu. Komin , K. Kosack , S. Krakau , F. Krayzel , P. P. Krüger , H. Laffon , G. Lamanna , J. Lefaucheur , V. Lefranc , A. Lemiére , M. Lemoine-Goumard , J. -P. Lenain , T. Lohse , A. Lopatin , C. -C. Lu , V. Marandon , A. Marcowith , R. Marx , G. Maurin , N. Maxted , M. Mayer , T. J. L. McComb , J. Méhault , P. J. Meintjes , U. Menzler , M. Meyer , A. M. W. Mitchell , R. Moderski , M. Mohamed , K. Morå , E. Moulin , T. Murach , M. de Naurois , J. Niemiec , S. J. Nolan , L. Oakes , H. Odaka , S. Ohm , B. Opitz , M. Ostrowski , I. Oya , M. Panter , R. D. Parsons , M. Paz Arribas , N. W. Pekeur , G. Pelletier , J. Perez , P. -O. Petrucci , B. Peyaud , S. Pita , H. Poon , G. Pühlhofer , M. Punch , A. Quirrenbach , S. Raab , I. Reichardt , A. Reimer , O. Reimer , M. Renaud , R. de los Reyes , F. Rieger , L. Rob , C. Romoli , S. Rosier-Lees , G. Rowell , B. Rudak , C. B. Rulten , V. Sahakian , D. Salek , D. A. Sanchez , A. Santangelo , R. Schlickeiser , F. Schüssler , A. Schulz , U. Schwanke , S. Schwarzburg , S. Schwemmer , P. Serpico , H. Sol , F. Spanier , G. Spengler , F. Spieß , L. Stawarz , R. Steenkamp , C. Stegmann , F. Stinzing , K. Stycz , I. Sushch , J. -P. Tavernet , T. Tavernier , A. M. Taylor , R. Terrier , M. Tluczykont , C. Trichard , K. Valerius , C. van Eldik , B. van Soelen , G. Vasileiadis , J. Veh , C. Venter , A. Viana , P. Vincent , J. Vink , H. J. Völk , F. Volpe , M. Vorster , T. Vuillaume , S. J. Wagner , P. Wagner , R. M. Wagner , M. Ward , M. Weidinger , Q. Weitzel , R. White , A. Wierzcholska , P. Willmann , A. Wörnlein , D. Wouters , R. Yang , V. Zabalza , D. Zaborov , M. Zacharias , A. A. Zdziarski , A. Zech , H. -S. Zechlin

The Oceanus Moving Group: A New 500 Myr-Old Host for the Nearest Brown Dwarf

We report the discovery of the Oceanus moving group, a $\approx$ 500 Myr-old group with 50 members and candidate members at distances 2-50 pc from the Sun using an unsupervised clustering analysis of nearby stars with Gaia DR3 data. This…

太阳与恒星天体物理 · 物理学 2023-03-29 Jonathan Gagné , Leslie Moranta , Jacqueline K. Faherty , Rocio Kiman , Dominic Couture , Arnaud René Larochelle , Mark Popinchalk , Daniella Morrone

Gravitational Microlensing in the Local Group

The status of searches for gravitational microlensing events of the stars in our galaxy and in other galaxies of the Local Group, the interpretation of the results, some theory, and prospects for the future are reviewed. The searches have…

天体物理学 · 物理学 2011-05-05 Bohdan Paczynski

Morphology and stellar populations of a candidate ultra-diffuse galaxy in early Euclid and Rubin imaging

We present multi-wavelength imaging and analysis of a low surface brightness (LSB) dwarf galaxy in the Extended Chandra Deep Field South (ECDFS), SMDG0333094-280938, with particular emphasis on data from the Euclid space telescope and from…

星系天体物理 · 物理学 2025-07-17 Aaron J. Romanowsky , Yimeng Tang , Kevin A. Bundy

New abundance measurements in UKS 1927-177, a very metal-poor galaxy in the Local Group

We present new results from optical spectroscopy of the brightest Hii region in the dwarf irregular galaxy UKS 1927-177 in Sagittarius (SagDIG). From high signal-to-noise spectra, reddening-corrected line flux ratios have been measured with…

天体物理学 · 物理学 2009-11-07 I. Saviane , L. Rizzi , E. V. Held , F. Bresolin , Y. Momany

Compact groups of dwarf galaxies in TNG50: late hierarchical assembly and delayed stellar build-up in the low-mass regime

Compact groups of dwarf galaxies (CGDs) have been observed at low redshifts ($z<0.1$) and are direct evidence of hierarchical assembly at low masses. To understand the formation of CGDs and the galaxy assembly in the low-mass regime, we…

星系天体物理 · 物理学 2024-02-02 Rodrigo Flores-Freitas , Marina Trevisan , Maitê Mückler , Gary A. Mamon , Allan Schnorr-Müller , Vitor Bootz

Hubble Space Telescope Observations of NGC 253 Dwarf Satellites: Discovery of Three Ultra-faint Dwarf Galaxies

We present deep Hubble Space Telescope imaging of five faint dwarf galaxies associated with the nearby spiral NGC 253 (D$\approx$3.5 Mpc). Three of these are newly discovered ultra-faint dwarf galaxies, while all five were found in the…

星系天体物理 · 物理学 2022-02-23 Burçin Mutlu-Pakdil , David J. Sand , Denija Crnojević , Michael G. Jones , Nelson Caldwell , Puragra Guhathakurta , Anil C. Seth , Joshua D. Simon , Kristine Spekkens , Jay Strader , Elisa Toloba

New dwarf galaxy candidates in the Centaurus group

Recent studies of the distribution and kinematics of the Milky Way and Andromeda satellite galaxy systems have confirmed the existence of coplanar, corotating structures of galaxies. In addition to the 'missing satellite problem', these…

星系天体物理 · 物理学 2015-11-04 Oliver Müller , Helmut Jerjen , Bruno Binggeli

Satellite accretion in action: a tidally disrupting dwarf spheroidal around the nearby spiral galaxy NGC 253

We report the discovery of NGC 253-dw2, a dwarf spheroidal (dSph) galaxy candidate undergoing tidal disruption around a nearby spiral galaxy, NGC 253 in the Sculptor group: the first such event identified beyond the Local Group. The dwarf…

星系天体物理 · 物理学 2016-02-03 Aaron J. Romanowsky , D. Martinez-Delgado , Nicolas F. Martin , Gustavo Morales , Zachary G. Jennings , R. Jay GaBany , Jean P. Brodie , Eva K. Grebel , Johannes Schedler , Michael Sidonio

New low surface brightness dwarf galaxies in the Centaurus group

We conducted an extensive CCD search for faint, unresolved dwarf galaxies of very low surface brightness in the whole Centaurus group region encompassing the Cen A and M 83 subgroups lying at a distance of roughly 4 and 5 Mpc, respectively.…

星系天体物理 · 物理学 2017-01-11 Oliver Müller , Helmut Jerjen , Bruno Binggeli