Palomar 12

Palomar 12

Globular cluster
name = Palomar 12


caption = Palomar 12 by Hubble Space Telescope, 3.36′ view
epoch = J2000
class = XII
constellation = Capricornus
ra = RA|21|46|38.8cite web
title=SIMBAD Astronomical Database
work=Results for Palomar 12
url=http://simbad.u-strasbg.fr/Simbad
accessdate=2006-11-16
]
dec = DEC|−21|15|03
dist_ly = 64 ± 3 kly
dist_pc = 19.5 ± 0.9 kpccite journal
author = A. Rosenberg, I. Saviane, G. Piotto, E. V. Held
title=Young Galactic globular clusters II. The case of Palomar 12
journal=Astronomy and Astrophysics
year=1998
volume=339
pages=61–69
url=http://adsabs.harvard.edu/abs/1998A&A...339...61R
]
appmag_v = 11.99
size_v = 17′.4
radius_ly = 162 ± 8 ly [distance × sin( diameter_angle / 2 ) = 162 ly. radius]
mass_kg = -
mass_msol = -
v_hb = -
age = 6.5 Gyrcitation
last1 = Geisler
first1 = Doug
last2 = Wallerstein
first2 = George
last3 = Smith
first3 = Verne V.
last4 = Casetti-Dinescu
first4 = Dana I.
title = Chemical Abundances and Kinematics in Globular Clusters and Local Group Dwarf Galaxies and Their Implications for Formation Theories of the Galactic Halo
year = 2007
date = September 2007
journal = The Publications of the Astronomical Society of the Pacific
volume = 119
issue = 859
page = 939-961
url = http://adsabs.harvard.edu/abs/2007PASP..119..939G
]
notes = -
names = GCl 123

Palomar 12 is a globular cluster in the constellation Capricornus that belongs to the halo of the Milky Way galaxy. First discovered on the Palomar Survey Sky plates by Robert G. Harrington and Fritz Zwicky, [cite journal
last=Abell
first = George O.
authorlink = George Ogden Abell
title=Globular Clusters and Planetary Nebulae Discovered on the National Geographic Society-Palomar Observatory Sky Survey
journal=Publications of the Astronomical Society of the Pacific
year=1955
volume=67
issue=397
pages=258
url=http://adsabs.harvard.edu/cgi-bin/bib_query?1955PASP...67..258A
doi=10.1086/126815
] it was catalogued as a globular cluster. However Zwicky came to believe this was actually a nearby dwarf galaxy in the Local Group. It is a relatively young cluster, being about 30% younger than most of the globular clusters in the Milky Way. It is metal-rich with a metallicity of [Fe/H] ~= -0.8. It has an average luminosity distribution of Mv = -4.48.citation
last1 = van den Bergh
first1 = Sidney
authorlink1 = Sidney van den Bergh
year = 2007
date = July 2007
title = The Luminosity Distribution of Globular Clusters in Dwarf Galaxies
journal = The Astronomical Journal
volume = 134
issue = 1
page = 344-345
url = http://adsabs.harvard.edu/abs/2007AJ....134..344V
]

Based on proper motion studies, this cluster was first suspected in 2000 to have been captured from the Sagittarius dwarf galaxy about 1.7 Gyr ago. [cite journal
author=D. I. Dinescu, S. R. Majewski, T. M. Girard, K. M. Cudworth
title=The Absolute Proper Motion of Palomar 12: A Case for Tidal Capture from the Sagittarius Dwarf Spheroidal Galaxy
journal=The Astronomical Journal
year=2000
volume=120
issue=4
pages=1892–1905
url=http://adsabs.harvard.edu/abs/2000astro.ph..6314D
doi=10.1086/301552
] Its membership is now generally believed (Cohen 2004, Sbordone et al. 2006).

References

External links

* [http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=Palomar+12 Simbad reference data]
* [http://www.seds.org/~spider/spider/MWGC/pal12.html SEDS: Palomar 12, Capricornus Dwarf]
*


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Palomar 2 — Звёздное скопление …   Википедия

  • Palomar 12 — Звёздное скопление …   Википедия

  • Palomar 4 — Звёздное скопление История и …   Википедия

  • Palomar — bezeichnet: Palomar 5, Kugelsternhaufen im Sternbild Schlange Palomar 12, Kugelsternhaufen im Sternbild Steinbock Palomar Leiden Survey Palomar Observatorium Palomar Observatory Sky Survey Sant Andreu de Palomar, Stadtteil von Barcelona, Spanien… …   Deutsch Wikipedia

  • Palomar — is the name of:Places* several places in North San Diego County, California, including: ** Palomar College ** Palomar Mountain *** the Palomar Observatory (located on said mountain) * El Palomar, Buenos Aires, a city forming part of Greater… …   Wikipedia

  • Palomar — Saltar a navegación, búsqueda El término palomar puede hacer referencia a: Palomar, construcción para la crianza de palomas. Palomar, una parroquia del concejo asturiano de Ribera de Arriba, España. Palomar, localidad de la provincia de Valencia …   Wikipedia Español

  • Palomar 1 — Données d’observation (Époque J2000.0) Constellation Céphée Ascension droite (α) 03h …   Wikipédia en Français

  • palomar — sustantivo masculino 1. Lugar donde se tienen y crían las palomas. Frases y locuciones 1. alborotar el palomar Uso/registro: coloquial, restringido. Alterar (una persona, un hecho) con palabras o accione …   Diccionario Salamanca de la Lengua Española

  • Palomár — Palomár, span. Ort, s. San Andrés de Palomár …   Kleines Konversations-Lexikon

  • Palomar — (mont) montagne des È. U. (Californie); 1 871 m. L observatoire du mont Palomar est doté d un télescope de 5,08 m d ouverture …   Encyclopédie Universelle

  • palomar — v. tr. 1. Coser os panos (de uma vela). • s. m. 2.  [Náutica] Fio grosso com que se cosem as velas. 3. O mesmo que pombal …   Dicionário da Língua Portuguesa

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”