Journal ArticleDOI
A dwarf satellite galaxy in Sagittarius
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TLDR
The Sagittarius dwarf galaxy as mentioned in this paper is an extended group of comoving stars in the direction of the Galactic Centre, which is interpreted as belonging to a dwarf galaxy that is closer to our own Galaxy than any other yet known.Abstract:
WE have detected a large, extended group of comoving stars in the direction of the Galactic Centre, which we interpret as belonging to a dwarf galaxy that is closer to our own Galaxy than any other yet known. Located in the constellation of Sagittarius, and on the far side of the Galactic Centre, it has not previously been seen because of the large number of foreground stars (in the Milky Way) in that direction. Following convention, we propose to call it the Sagittarius dwarf galaxy. Its properties are similar to those of the eight other dwarf spheroidal companions to the Milky Way, and it is comparable in size and luminosity to the largest of them— the Fornax system. The Sagittarius dwarf is elongated towards the plane of the Milky Way, suggesting that it is undergoing some tidal disruption before being absorbed by the Milky Way.read more
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Journal ArticleDOI
Dwarf galaxies of the local group
TL;DR: The Local Group dwarfs offer a unique window to the detailed properties of the most common type of galaxy in the Universe as mentioned in this paper. But, the local group dwarfs are not suitable for direct observation.
Journal ArticleDOI
Sdss-iii: massive spectroscopic surveys of the distant universe, the milky way, and extra-solar planetary systems
Daniel J. Eisenstein,Daniel J. Eisenstein,David H. Weinberg,Eric Agol,Hiroaki Aihara,Carlos Allende Prieto,Carlos Allende Prieto,Scott F. Anderson,James A. Arns,Éric Aubourg,Stephen Bailey,Eduardo Balbinot,Robert H. Barkhouser,Timothy C. Beers,Andreas A. Berlind,Steven J. Bickerton,Dmitry Bizyaev,Michael R. Blanton,John J. Bochanski,Adam S. Bolton,Casey T. Bosman,Jo Bovy,W. N. Brandt,Ben Breslauer,Howard Brewington,J. Brinkmann,Peter J. Brown,Joel R. Brownstein,Dan Burger,Nicolás G. Busca,H. Campbell,Phillip Cargile,William Carithers,Joleen K. Carlberg,Michael A. Carr,Liang Chang,Liang Chang,Yanmei Chen,Cristina Chiappini,Johan Comparat,Natalia Connolly,Marina Cortês,Rupert A. C. Croft,Katia Cunha,Luiz N. da Costa,James R. A. Davenport,Kyle S. Dawson,Nathan De Lee,Gustavo F. Porto de Mello,Fernando de Simoni,Janice D. R. Dean,Saurav Dhital,Anne Ealet,Garrett Ebelke,Garrett Ebelke,Edward M. Edmondson,J. Eiting,Stephanie Escoffier,M. Esposito,M. Esposito,Michael L. Evans,Xiaohui Fan,Bruno Femenía Castellá,Bruno Femenía Castellá,Leticia D. Ferreira,Greg Fitzgerald,Scott W. Fleming,Andreu Font-Ribera,Eric B. Ford,Peter M. Frinchaboy,Ana E. García Pérez,B. Scott Gaudi,Jian Ge,Luan Ghezzi,Bruce Gillespie,Gerry Gilmore,Léo Girardi,J. Richard Gott,Andrew Gould,Eva K. Grebel,James E. Gunn,J. C. Hamilton,Paul Harding,David W. Harris,Suzanne L. Hawley,Frederick R. Hearty,Joseph F. Hennawi,Jonay I. González Hernández,Shirley Ho,David W. Hogg,Jon A. Holtzman,K. Honscheid,Naohisa Inada,Inese I. Ivans,Linhua Jiang,Peng Jiang,Peng Jiang,Jennifer A. Johnson,Cathy Jordan,Wendell P. Jordan,Wendell P. Jordan,Guinevere Kauffmann,Eyal A. Kazin,D. Kirkby,Mark A. Klaene,Gillian R. Knapp,Jean-Paul Kneib,Christopher S. Kochanek,Lars Koesterke,Juna A. Kollmeier,Richard G. Kron,Richard G. Kron,Hubert Lampeitl,Dustin Lang,James E. Lawler,Jean-Marc Le Goff,Brian Lee,Young Sun Lee,Jarron Leisenring,Yen-Ting Lin,Yen-Ting Lin,Jian Liu,Dan Long,Craig P. Loomis,Sara Lucatello,Britt Lundgren,Robert H. Lupton,Bo Ma,Zhibo Ma,Nicholas MacDonald,Claude E. Mack,Suvrath Mahadevan,Marcio A. G. Maia,Steven R. Majewski,Martin Makler,Elena Malanushenko,Viktor Malanushenko,Rachel Mandelbaum,Claudia Maraston,Daniel Margala,Paul Maseman,Paul Maseman,Karen L. Masters,Cameron K. McBride,Patrick McDonald,Patrick McDonald,Ian D. McGreer,Richard G. McMahon,Olga Mena Requejo,Brice Ménard,Brice Ménard,Jordi Miralda-Escudé,Jordi Miralda-Escudé,Heather L. Morrison,Fergal Mullally,Fergal Mullally,Demitri Muna,Hitoshi Murayama,Adam D. Myers,Tracy Naugle,Angelo Fausti Neto,Duy Cuong Nguyen,Robert C. Nichol,David L. Nidever,Robert W. O'Connell,Ricardo L. C. Ogando,Matthew D. Olmstead,Daniel Oravetz,Nikhil Padmanabhan,Martin Paegert,Nathalie Palanque-Delabrouille,Kaike Pan,Parul Pandey,John K. Parejko,Isabelle Pâris,Paulo S. Pellegrini,Joshua Pepper,Will J. Percival,Patrick Petitjean,Robert Pfaffenberger,Janine Pforr,Stefanie Phleps,Christophe Pichon,Matthew M. Pieri,Matthew M. Pieri,Francisco Prada,Adrian M. Price-Whelan,M. Jordan Raddick,Beatriz H. F. Ramos,I. Neill Reid,Céline Reylé,James Rich,Gordon T. Richards,George H. Rieke,Marcia J. Rieke,Hans-Walter Rix,Annie C. Robin,H. J. Rocha-Pinto,Constance M. Rockosi,Natalie A. Roe,Emmanuel Rollinde,Ashley J. Ross,Nicholas P. Ross,Bruno M. Rossetto,Ariel G. Sánchez,Basilio X. Santiago,Conor Sayres,Ricardo P. Schiavon,David J. Schlegel,Katharine J. Schlesinger,Sarah J. Schmidt,Donald P. Schneider,Kris Sellgren,Alaina Shelden,Erin Sheldon,Matthew Shetrone,Yiping Shu,John D. Silverman,Jennifer Simmerer,Audrey Simmons,Thirupathi Sivarani,Thirupathi Sivarani,Mike Skrutskie,Anže Slosar,Stephen A. Smee,Verne V. Smith,Stephanie A. Snedden,Keivan G. Stassun,Keivan G. Stassun,Oliver Steele,Matthias Steinmetz,Mark H. Stockett,Todd Stollberg,Michael A. Strauss,Alexander S. Szalay,Masayuki Tanaka,Aniruddha R. Thakar,Daniel Thomas,Jeremy L. Tinker,Benjamin M. Tofflemire,Rita Tojeiro,Christy Tremonti,Mariana Vargas Magaña,Licia Verde,Licia Verde,Nicole P. Vogt,David A. Wake,Xiaoke Wan,Ji Wang,Benjamin A. Weaver,Martin White,Simon D. M. White,John C. Wilson,John P. Wisniewski,W. Michael Wood-Vasey,Brian Yanny,Naoki Yasuda,Christophe Yèche,Donald G. York,Erick T. Young,Erick T. Young,Gail Zasowski,Idit Zehavi,Bo Zhao +263 more
TL;DR: SDSS-III as mentioned in this paper is a program of four spectroscopic surveys on three scientific themes: dark energy and cosmological parameters, the history and structure of the Milky Way, and the population of giant planets around other stars.
Journal ArticleDOI
SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
TL;DR: The SEGUE survey as mentioned in this paper obtained 240,000 moderate resolution (R = 1800) spectra from 3900 - 9000 Angstroms of fainter Milky Way stars (14.0 10 per resolution element, stellar atmospheric parameters are estimated, including metallicity, surface gravity, and effective temperature).
Journal ArticleDOI
SEGUE: A SPECTROSCOPIC SURVEY OF 240,000 STARS WITH g = 14-20
Brian Yanny,Constance M. Rockosi,Heidi Jo Newberg,Gillian R. Knapp,Jennifer K. Adelman-McCarthy,Bonnie Alcorn,S. Allam,Carlos Allende Prieto,Carlos Allende Prieto,Deokkeun An,K. S. J. Anderson,K. S. J. Anderson,Scott F. Anderson,Coryn A. L. Bailer-Jones,Steve Bastian,Timothy C. Beers,Eric F. Bell,Vasily Belokurov,Dmitry Bizyaev,Norm Blythe,John J. Bochanski,William N. Boroski,Jarle Brinchmann,J. Brinkmann,Howard Brewington,Larry N. Carey,Kyle M. Cudworth,Michael L. Evans,Nick Evans,Evalyn Gates,Boris T. Gänsicke,Bruce Gillespie,G. F. Gilmore,Ada Nebot Gomez-Moran,Eva K. Grebel,Jim Greenwell,James E. Gunn,Cathy Jordan,Wendell Jordan,Paul Harding,Hugh C. Harris,John S. Hendry,Diana Holder,Inese I. Ivans,Željko Ivezić,Sebastian Jester,Jennifer A. Johnson,Stephen M. Kent,S. J. Kleinman,Alexei Y. Kniazev,Jurek Krzesinski,Richard G. Kron,Nikolay Kuropatkin,Svetlana Lebedeva,Young Sun Lee,R. French Leger,Sébastien Lépine,Steve Levine,Huan Lin,Dan Long,Craig P. Loomis,Robert H. Lupton,O. Malanushenko,Viktor Malanushenko,Bruce Margon,David Martínez-Delgado,P. M. McGehee,Dave Monet,Heather L. Morrison,Jeffrey A. Munn,Eric H. Neilsen,Atsuko Nitta,John E. Norris,Daniel Oravetz,Russell Owen,Nikhil Padmanabhan,Kaike Pan,R. S. Peterson,Jeffrey R. Pier,Jared Platson,Paola Re Fiorentin,Paola Re Fiorentin,Gordon T. Richards,Hans-Walter Rix,David J. Schlegel,Donald P. Schneider,Matthias R. Schreiber,Axel Schwope,Valena C. Sibley,Audrey Simmons,Stephanie A. Snedden,J. Allyn Smith,Larry Stark,Fritz Stauffer,Matthias Steinmetz,Christopher Stoughton,Mark SubbaRao,Mark SubbaRao,Alexander S. Szalay,Paula Szkody,Aniruddha R. Thakar,Sivarani Thirupathi,Douglas L. Tucker,A. Uomoto,Daniel E. Vanden Berk,S. Vidrih,Yogesh Wadadekar,Yogesh Wadadekar,S. Watters,R. Wilhelm,Rosemary F. G. Wyse,Jean Yarger,Daniel B. Zucker +112 more
TL;DR: The Sloan Extension for Galactic Understanding and Exploration (SEGUE) Survey as mentioned in this paper obtained approximately 240,000 moderate-resolution spectra from 3900 to 9000 of fainter Milky Way stars (14.0 10 per resolution element).
Journal ArticleDOI
The New Galaxy: Signatures of Its Formation
TL;DR: The formation and evolution of galaxies is one of the great outstanding problems of astrophysics as discussed by the authors, and a detailed physical picture where individual stellar populations can be associated with (tagged to) elements of the protocloud is far beyond our current understanding.
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