HVC 127-41-330

HVC 127-41-330

HVC 127-41-330 is a "high velocity cloud" located at that galactic longitude, latitude, and velocity towards Earth. It is 20,000 light years in diameter and is located 2.3 million light years from Earth, between M31 and M33.cite paper |author = Josh Simon | coauthors = | title = Dark Matter in Dwarf Galaxies: Observational Tests of the Cold Dark Matter Paradigm on Small Scales | version = | publisher = | date = 2005 | url = http://www.astro.caltech.edu/~jsimon/thesis/jdsthesis.pdf | format = | accessdate = ] This cloud of neutral hydrogen (detectable via 21 cm H-I emissions), unlike other HVCs shows a rotational component and dark matter. 80% of the mass of the cloud is dark matter. It is also the first HVC discovered not associated with the Milky Way galaxy or subgroup (subcluster).

Astronomer Josh Simon considers it a candidate for being a dark galaxy. With its rotation, it may be a very low density dwarf galaxy of unused hydrogen (no stars), a remnant of the formation of the Local Group.

ee also

* Dark galaxy
* VIRGOHI21
* LSB galaxy

References


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Dark galaxy — A dark galaxy is a hypothetical galaxy composed of dark matter.[1] Dark galaxies receive their name because they have no detectable stars and are theoretically invisible. An influential community of scientists conjecture the existence of dark… …   Wikipedia

  • Dunkle Galaxie — Eine Dunkle Galaxie ist eine Galaxie, deren Masse zu einem Großteil aus nicht selbstleuchtender Materie besteht und somit nur sehr wenige bis gar keine Sterne enthält. Daher auch der Namenszusatz Dunkel . Die Galaxie könnte Gas, kosmischen Staub… …   Deutsch Wikipedia

  • Hochgeschwindigkeitswolke — Hochgeschwindigkeitswolken (auch HVC, für High Velocity Cloud) sind ein astronomisches Phänomen. Sie bestehen aus extrem heißem und dünnem Plasma (ionisiertem Gas). Sie befinden sich im galaktischen Halo und im intergalaktischen Medium. Ihre… …   Deutsch Wikipedia

  • Interstellar cloud — is the generic name given to an accumulation of gas, plasma and dust in our and other galaxies. Put differently, an interstellar cloud is a denser than average region of the interstellar medium. Depending on the density, size and temperature of a …   Wikipedia

  • Local Group — The Local Group is the group of galaxies that includes our galaxy, the Milky Way. The group comprises over 35 galaxies, with its gravitational center located somewhere between the Milky Way and the Andromeda Galaxy. The galaxies of the Local… …   Wikipedia

  • List of galaxies — This is a list of notable galaxies.List* 4C 37.11 * Abell 1835 IR1916 * AM 0644 741 * Andromeda Galaxy (M31/NGC 224) * Andromeda I * Antennae Galaxies (NGC 4038/NGC 4039) * Aquarius Dwarf * Arp 299 pair of colliding galaxies; has six recorded… …   Wikipedia

  • VIRGOHI21 — Infobox Galaxy name =VIRGOHI 21 epoch = J2000 type = ra = RA|12|17|53.6cite web title=NASA/IPAC Extragalactic Database work=Results for VIRGOHI 21 url=http://nedwww.ipac.caltech.edu/ accessdate=2006 11 19 ] dec = DEC|+14|45|25 constellation name …   Wikipedia

  • Galaxia oscura — Una galaxia oscura es un objeto del tamaño de una galaxia que contiene muy pocas o ninguna estrella, por lo que apenas emite luz. Puede contener gas, polvo interestelar y materia oscura. Varios objetos son candidatos para ser considerados… …   Wikipedia Español

  • Galaxias — Anexo:Galaxias Saltar a navegación, búsqueda Lista de galaxias notables Nombre Imagen Tipo Constelación Magnitud aparente 4C 37.11 Sy Perseo 17 2 …   Wikipedia Español

  • Anexo:Galaxias — Lista de galaxias notables Nombre Imagen Tipo Constelación Magnitud aparente 4C 37.11 Sy Perseo 17 2 A1689 zD1 …   Wikipedia Español

Share the article and excerpts

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