IC 1613

Galaxie
IC 1613
{{{Kartentext}}}
Aufnahme mithilfe des Víctor M. Blanco Telescope
AladinLite
SternbildWalfisch
Position
Äquinoktium: J2000.0, Epoche: J2000.0
Rektaszension01h 04m 47,8s[1]
Deklination+02° 07′ 04″[1]
Erscheinungsbild
Morphologischer TypIB(s)m[2]
Helligkeit (visuell)9,3 mag[2]
Helligkeit (B-Band)9,9 mag[2]
Winkel­ausdehnung16,2′ × 14,5′[1]
Positionswinkel50°[2]
Flächen­helligkeit15,1 mag/arcmin²[2]
Physikalische Daten
ZugehörigkeitLokale Gruppe[1]
Rotverschiebung−0,000781 ± 0,000003[1]
Radial­geschwin­digkeit−(234 ± 1) km/s[1]
Hubbledistanz
H0 = 73 km/(s • Mpc)		(2 ± 0) · 106 Lj
(0,725 ± 0,069) Mpc [1]
Durchmesser11.000 Lj[3]
Geschichte
EntdeckungMax Wolf
EntdeckungsdatumSeptember 1906
Katalogbezeichnungen
IC 1613 • UGC 668 • PGC 3844 • CGCG 384-68 • MCG +00-03-70 • IRAS 01025+0153 • DDO 8

IC 1613 ist eine irreguläre Zwerggalaxie vom Typ IB(s)m im Sternbild Cetus am Südsternhimmel. Sie ist rund 2,4 Millionen Lichtjahre vom Sonnensystem entfernt und hat einen Durchmesser von etwa 11.000 Lichtjahren. Das Objekt ist Mitglied der Lokalen Gruppe.

Die meisten Sterne in IC 1613 sind rund 7 Milliarden Jahre alt, aber es gibt eine ganze Reihe von jungen Sternen, wie das GALEX-Bild unten zeigt. Unter ihnen befinden sich mindestens fünf Population-II-Cepheiden und einige RR-Lyrae-Veränderliche.

UV-Aufnahme (GALEX, links)

Die Galaxie wurde im September 1906 vom deutschen Astronomen Max Wolf entdeckt.[4]

Literatur

  • König, Michael & Binnewies, Stefan (2019): Bildatlas der Galaxien: Die Astrophysik hinter den Astrofotografien, Stuttgart: Kosmos, S. 302

Einzelnachweise

  1. ↑ a b c d e NASA/IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e SEDS: IC 1613
  3. ↑ NASA/IPAC
  4. ↑ Seligman

Auf dieser Seite verwendete Medien

Caldwell Catalogue.jpg
Autor/Urheber: Roberto Mura, Lizenz: CC BY-SA 3.0
Caldwell Catalogue objects.
IC 1613 in UV and Visible Light.jpg
Ultraviolet image (left) and visual image (right) of the irregular dwarf galaxy IC 1613. Low surface brightness galaxies, such as IC 1613, are more easily detected in the ultraviolet because of the low background levels compared to visual wavelengths.
IC1613 - Noirlab2106b.jpg
Autor/Urheber:

Credit:DES/DOE/Fermilab/NCSA & CTIO/NOIRLab/NSF/AURA

Acknowledgments: Image processing: DES, Jen Miller (Gemini Observatory/NSF's NOIRLab), Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin, Lizenz: CC BY 4.0
The irregular dwarf galaxy IC 1613 — excerpt from the Dark Energy Survey


The irregular dwarf galaxy IC 1613 contains some 100 million stars and is a member of our Local Group of galaxies, which also includes our Milky Way, the Andromeda spiral galaxy, and the Magellanic Clouds. It is at a distance of 2.4 million light-years and contains several examples of Cepheid variable stars — key calibrators of the cosmic distance ladder. The bulk of its stars were formed about 7 billion years ago and it does not appear to be undergoing star formation at the present day, unlike other very active dwarf irregulars such as the Large and Small Magellanic clouds.

To the lower right of IC 1613, one may view a background galaxy cluster (several hundred times more distant than IC 1613) consisting of dozens of orange-yellow blobs, centered on a pair of giant cluster elliptical galaxies. To the left of the irregular galaxy is a bright, sixth magnitude, foreground, Milky Way star in the constellation of Cetus the Whale, identified here as a star by its sharp diffraction spikes radiating at 45-degree angles.

This image is an excerpt from the Dark Energy Survey, which has released a massive, public collection of astronomical data and calibrated images from six years of work. The Dark Energy Survey is a global collaboration that includes the Department of Energy's (DOE) Fermi National Accelerator Laboratory (Fermilab), the National Center for Supercomputing Applications (NCSA), and NSF’s NOIRLab. The image was taken with the Dark Energy Camera, fabricated by DOE, on the Víctor M. Blanco 4-meter Telescope.

The immensity and depth of the survey can be appreciated by diving into the zoomable version of this wider excerpt.

Credit:

DES/DOE/Fermilab/NCSA & CTIO/NOIRLab/NSF/AURA

Acknowledgments: Image processing: DES, Jen Miller (Gemini Observatory/NSF's NOIRLab), Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin