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Encyclopedia > Willman 1
Willman 1
Galaxy List of galaxies
Observation data
(Epoch J2000)
Constellation Ursa Major
Right ascension 10h 49m 22.3s[1]
Declination +51° 03′ 03.6″[1]
Redshift
Distance 120 ± 20 kly (38 ± 7 kpc)[2]
Type extreme dSph or unusual globular cluster[1]
Apparent dimensions (V)
Apparent magnitude (V)
Notable features
Other designations

Willman 1 or SDSS J1049+5103[2] is an extreme globular cluster or ultra low-mass dwarf galaxy discovered by a team lead by Beth Willman of New York University, using Sloan Digital Sky Survey data. As of 2006, it is the third dimmest galaxy known, after Boo dSph and UMa dSph, 200 times dimmer than the next dimmest. The galaxy is a satellite of the Milky Way; ~120,000 light-years away. It has an absolute magnitude of -2.5.[2] The luminosity function varies between the center and the tails which suggest mass segregation similar to that found in Palomar 5.[2] Image File history File links Wiki_letter_w. ... NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 56,000 light years in diameter and approximately 60 million light years distant. ... List of galaxies: Abell 1835 IR1916 AM 0644-741 Andromeda Galaxy (M31/NGC 224) Andromeda I Andromeda II Andromeda III Aquarius Dwarf Barnards Galaxy (NGC 6822) Black Eye Galaxy (M64/NGC 4826) Bodes Galaxy (M81/NGC 3031) Canis Major Dwarf Galaxy Carina Dwarf Centaurus A Galaxy Draco Dwarf Fornax... In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... The J2000. ... This article or section does not cite its references or sources. ... Ursa Major (IPA: ) is a constellation visible throughout the year in most of the northern hemisphere. ... Equatorial Coordinates Right ascension (abbrev. ... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ... Redshift of spectral lines in the optical spectrum of a supercluster of distant galaxies (right), as compared with that of the Sun (left). ... To help compare different orders of magnitude, this page lists distances starting at 1021 m (1 Zm or 110,000 light years). ... A light-year, symbol ly, is the distance light travels in one year: exactly 9. ... Stellar parallax motion The parsec (symbol pc) is a unit of length used in astronomy. ... Astronomers classify galaxies based on their overall shape (elliptical, spiral or barred spiral) and further by the specific properties of the individual galaxy (for example degree of ellipse, number of spirals or definition of bar). ... The angular diameter of an object as seen from a given position is the diameter measured as an angle. ... // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... The Globular Cluster M80 in the constellation Scorpius is located about 28,000 light years from the Sun and contains hundreds of thousands of stars. ... A dwarf galaxy is a small galaxy composed of up to several billion stars, a small number compared to our own Milky Ways 200-400 billion stars. ... Beth Willman is an American astronomer at New York University, working with Sloan Digital Sky Survey data. ... New York University (NYU) is a major research university in New York City. ... The Sloan Digital Sky Survey or SDSS is a major redshift survey using a dedicated 2. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... The Boötes Dwarf Galaxy (Boo dSph) is the faintest galaxy yet discovered,[] as of 2006, with a total luminosity of 100,000 Suns, and an absolute magnitude of -5. ... Ursa Major Dwarf is a dwarf spheroidal galaxy orbiting the Milky Way galaxy. ... The Milky Way (a translation of the Latin Via Lactea, in turn derived from the Greek Γαλαξίας (Galaxias), sometimes referred to simply as the Galaxy), is a barred spiral galaxy of the Local Group. ... A light-year, symbol ly, is the distance light travels in one year: exactly 9. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us, in the absence of interstellar extinction. ... Palomar 5 is a globular cluster discovered by Walter Baade in 1950. ...


References

  1. ^ a b c Willman, Beth; Blanton, Michael R.; West, Andrew A.; Dalcanton, Julianne J.; Hogg, David W.; Schneider, Donald P.; Wherry, Nicholas; Yanny, Brian; Brinkmann, Jon (2005). "A New Milky Way Companion: Unusual Globular Cluster or Extreme Dwarf Satellite?". The Astronomical Journal 129 (6): 2692-2700.
  2. ^ a b c d Beth Willman, Morad Masjedi, David W. Hogg, Julianne J. Dalcanton, David Martinez-Delgado, Michael Blanton, Andrew A. West, Aaron Dotter, Brian Chaboyer (20056). "Willman 1 - A Galactic Satellite at 40 kpc With Multiple Stellar Tails". The Astronomical Journal subject to acceptance.

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  Results from FactBites:
 
NYU Today (566 words)
Willman 1 is a collection of stars discovered by a team from the Center for Cosmology and Particle Physics.
Willman and her colleagues recently discovered a collection of stars, which have now been labeled SDSSJ1049+5103, or Willman 1, by the Sloan Digital Sky Survey, an astronomical survey project.
However, Willman 1 could be an unusual type of globular cluster—a spherical agglomeration of thousands to millions of old stars.
B-CC High School Athletics: Baseball Results (3691 words)
Offensively: Cole (1 for 3, 3 BBs); Lawrence (2 for 5, 1 BB); Symons (1 for 5, 1 HBP); Willman (2 for 5, 1 BB); Derr (2 for 3, 2 BB, 1 SAC); Coe (1 for 5, 1 SAC); Strom (1 for 4, 1 HBP).
Offensively: Alex Cole (2 for 3); Henry (1 for 2); Albert Kurtz (1 for 3); Reid Lawrence (1 for 3); Ben Symons (1 for 2); Max Valenstein (1 for 2); Willman (2 for 3); Ziskie (4 for 4); Mark Strom (1 for 3); Nick Sevilla (1 for 4); Caleb Bank (1 for 4).
Offensively: Cole (2 for 4); Henry (1 for 3); Ben Symons, (1 for 4); Joe Willman (1 for 3); Strom (1 for 2); John Genova (1 for 2).
  More results at FactBites »

 
 

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