NGC 1291

Galaxie
NGC 1269 / NGC 1291
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Aufnahme von GALEX
AladinLite
SternbildEridanus
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension03h 17m 18,6s[1]
Deklination−41° 06′ 29″[1]
Erscheinungsbild
Morphologischer Typ(R_1)SB(1)0/a / HII[1]
Helligkeit (visuell)8,5 mag[2]
Helligkeit (B-Band)9,4 mag[2]
Winkel­ausdehnung11′ × 9,5′[2]
Positionswinkel72°[2]
Flächen­helligkeit13,4 mag/arcmin²[2]
Physikalische Daten
ZugehörigkeitSSRS-Gruppe 44[1]
Rotverschiebung0,002799 ± 0,000006[1]
Radial­geschwin­digkeit(839 ± 2) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc)		(32 ± 2) · 106 Lj
(9,8 ± 0,7) Mpc [1]
Durchmesser125.000 Lj[3]
Geschichte
EntdeckungJames Dunlop
Entdeckungsdatum2. September 1826
Katalogbezeichnungen
NGC 1291 • PGC 12209 • ESO 301-002 • MCG -07-07-008 • IRAS 03154-4117 • 2MASX J03171859-4106290 • SGC 031528-4117.4 • AM 0315-411 • GC 685 • h 2521 • HIPASS J0317-41 • Dun 487 • LDCE 266 NED003

NGC 1269 = NGC 1291 ist eine linsenförmige Ringgalaxie vom Hubble-Typ SB0/a mit einer ungewöhnlichen inneren Balken- und äußeren Ringstruktur im Sternbild Eridanus am Südsternhimmel. Sie ist schätzungsweise 32 Millionen Lichtjahre von der Milchstraße entfernt, hat einen Durchmesser von etwa 125.000 Lichtjahren und ist die hellste Galaxie im Eridanus.

Das Objekt wurde am 2. September 1826 von James Dunlop entdeckt und als Dun 487 katalogisiert. Im Jahr 1836 beschrieb John Herschel es erneut. Als schließlich Johan Ludvig Emil Dreyer den 1888 veröffentlichten New General Catalogue erstellte, erkannte er diese Doppelbeobachtung nicht und vergab die Nummern NGC 1291 für Dunlops und NGC 1269 für Herschels Beobachtung.[4]

Literatur

  • König, Michael & Binnewies, Stefan (2019): Bildatlas der Galaxien: Die Astrophysik hinter den Astrofotografien, Stuttgart: Kosmos, S. 322
  • Hinz et al. (2012): Cool Dust in the Outer Ring of NGC 1291; in: The Astrophysical Journal 756(1)
  • F. Fragkoudi, E. Athanassoula & A. Bosma (2017): Constraining the dark matter content of NGC 1291 using hydrodynamic gas response simulations; in: Monthly Notices of the Royal Astronomical Society 466(1), S. 474–488
  • Luo et al. (2012): Probing the X-Ray Binary Populations of the Ring Galaxy NGC 1291; in: The Astrophysical Journal 749(2)

Weblinks

Commons: NGC 1291 – Sammlung von Bildern, Videos und Audiodateien

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e SEDS: NGC 1269
  3. ↑ NASA/IPAC
  4. ↑ Seligman

Auf dieser Seite verwendete Medien

PIA18847-GalaxyNGC1291-IR-SpitzerST-20141022.jpg
October 22, 2014

Ring of Stellar Fire

http://www.jpl.nasa.gov/spaceimages/details.php?id=pia18847

http://www.jpl.nasa.gov/news/news.php?release=2014-367

This image from NASA's Spitzer Space Telescope shows where the action is taking place in galaxy NGC 1291. The outer ring, colored red, is filled with new stars that are igniting and heating up dust that glows with infrared light.

This image from NASA's Spitzer Space Telescope, taken in infrared light, shows where the action is taking place in galaxy NGC 1291.

The outer ring, colored red in this view, is filled with new stars that are igniting and heating up dust that glows with infrared light. The stars in the central area produce shorter-wavelength infrared light than that seen in the ring, and are colored blue. This central area is where older stars live, having long ago gobbled up the available gas supply, or fuel, for making new stars.

The galaxy is about 12 billion years old and is located in the Eridanus constellation. It is known as a barred galaxy because a central bar of stars (which looks like a blue "S" in this view) dominates its center.

When galaxies are young and gas-rich, stellar bars drive gas toward the center, feeding star formation. Over time, as the star-making fuel runs out, the central regions become quiescent and star-formation activity shifts to the outskirts of a galaxy. There, spiral density waves and resonances induced by the central bar help convert gas to stars. The outer ring, seen here in red, is one such resonance location, where gas has been trapped and ignited into a star-forming frenzy.

NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the Spitzer Space Telescope mission for NASA's Science Mission Directorate, Washington. Science operations are conducted at the Spitzer Science Center at the California Institute of Technology in Pasadena. Spacecraft operations are based at Lockheed Martin Space Systems Company, Littleton, Colorado. Data are archived at the Infrared Science Archive housed at the Infrared Processing and Analysis Center at Caltech. Caltech manages JPL for NASA.

For more information about Spitzer, visit http://spitzer.caltech.edu and http://www.nasa.gov/spitzer.
NGC 1291 -HST10402 01 04 -R555GB435.jpg
Autor/Urheber: HST / Fabian RRRR (talk), Lizenz: CC BY-SA 3.0
Color rendering is done by by Aladin-software (2000A&AS..143...33B.)