NGC 7753
| Galaxie NGC 7753 | |
|---|---|
 | |
| Die Spiralgalaxien NGC 7752 und 7753, aufgenommen mithilfe des Hubble-Weltraumteleskops, des Victor M. Blanco Telescope und des Sloan-Digital-Sky-Survey-Teleskops. | |
| AladinLite | |
| Sternbild | Pegasus |
| Position Äquinoktium: J2000.0, Epoche: J2000.0 | |
| Rektaszension | 23h 47m 04,8s[1] |
| Deklination | +29° 29′ 00″[1] |
| Erscheinungsbild | |
| Morphologischer Typ | SAB(rs)bc[1] |
| Helligkeit (visuell) | 12,2 mag[2] |
| Helligkeit (B-Band) | 13 mag[2] |
| Winkelausdehnung | 3,3′ × 2,1′[1] |
| Positionswinkel | 50° |
| Flächenhelligkeit | 14,2 mag/arcmin²[2] |
| Physikalische Daten | |
| Rotverschiebung | 0,017239 ± 0,000020[1] |
| Radialgeschwindigkeit | (5168 ± 6) km/s[1] |
| Hubbledistanz H0 = 73 km/(s • Mpc) | (239 ± 17) · 106 Lj (73,3 ± 5,1) Mpc [1] |
| Durchmesser | 230.000 Lj |
| Geschichte | |
| Entdeckung | William Herschel |
| Entdeckungsdatum | 12. September 1784 |
| Katalogbezeichnungen | |
| NGC 7753 • UGC 12780 • PGC 72387 • MCG +05-56-005 • IRAS 23445+2911 • Arp 86 • GC 5011 • H II 213 • h 2268 • LDCE 1597 NED002 | |
NGC 7753 ist eine Balken-Spiralgalaxie vom Hubble-Typ SAB(rs)bc im Sternbild Pegasus am Nordsternhimmel. Sie ist etwa 240 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 230.000 Lichtjahren.
Gemeinsam mit ihrem wechselwirkenden Begleiter NGC 7752 bildet sie das Objekt Arp 86. Halton Arp gliederte seinen Katalog ungewöhnlicher Galaxien nach rein morphologischen Kriterien in Gruppen. Diese Galaxie gehört zu der Klasse Spiralgalaxien mit einem großen Begleiter hoher Flächenhelligkeit auf einem Arm (Arp-Katalog).
Entdeckt wurde die Galaxie am 12. September 1784 von William Herschel.[3]
Weblinks
Literatur
- König, Michael & Binnewies, Stefan (2019): Bildatlas der Galaxien: Die Astrophysik hinter den Astrofotografien, Stuttgart: Kosmos, S. 283
- Jeff Kanipe und Dennis Webb: The Arp Atlas of Peculiar Galaxies – A Chronicle and Observer´s Guide, Richmond 2006, ISBN 978-0-943396-76-7
Einzelnachweise
Auf dieser Seite verwendete Medien
Autor/Urheber: (Credit) ESA/Hubble and NASA, Dark Energy Survey, J. Dalcanton, Lizenz: CC BY 4.0
Hubble Spies a Pair of Squabbling Galaxies
This observation from the NASA/ESA Hubble Space Telescope showcases Arp 86, a peculiar pair of interacting galaxies which lies roughly 220 million light-years from Earth in the constellation Pegasus. Arp 86 is composed of the two galaxies NGC 7752 and NGC 7753 — NGC 7753 is the large spiral galaxy dominating this image, and NGC 7752 is its smaller companion. The diminutive companion galaxy almost appears to be attached to NGC 7753, and it is this peculiarity that has earned the designation “Arp 86” — signifying that the galaxy pair appears in the Atlas of Peculiar Galaxies compiled by the astronomer Halton Arp in 1966. The gravitational squabble between the two galaxies is doomed to end catastrophically for NGC 7752. It will eventually either be flung out into intergalactic space or be entirely engulfed by its far larger neighbour.
Hubble observed Arp 86 as part of a larger effort to understand the connections between young stars and the clouds of cold gas in which they form. Hubble gazed into star clusters and clouds of gas and dust in a variety of environments dotted throughout nearby galaxies. Combined with measurements from ALMA, a gigantic radio telescope perched high in the Chilean Andes, these Hubble observations provide a treasure trove of data for astronomers working to understand how stars are born.
These observations also helped sow the seeds of future research with an upcoming space telescope, the NASA/ESA James Webb Space Telescope (JWST). This telescope, due to launch later this year, will study star formation in dusty regions such as the galaxies of Arp 86.
Credit:
ESA/Hubble and NASA, Dark Energy Survey, J. Dalcanton
Coordinates Position (RA): 23 47 2.82 Position (Dec): 29° 28' 34.43" Field of view: 3.26 x 3.23 arcminutes Orientation: North is 1.7° right of vertical Colours & filters Band Wavelength Telescope Optical u 354 nm SDSS Optical G 474 nm Víctor M. Blanco 4-meter Telescope DECam Optical G 477 nm SDSS Optical R 644 nm Víctor M. Blanco 4-meter Telescope DECam Optical R 623 nm SDSS Optical I 762 nm SDSS Optical Z 913 nm SDSS Optical Z 919 nm Víctor M. Blanco 4-meter Telescope DECam Optical V 606 nm Hubble Space Telescope ACS.