NGC 5267

NGC 5267
Image illustrative de l’article NGC 5267
La galaxie spirale NGC 5267.
Données d’observation
(Époque J2000.0)
Constellation Chiens de chasse
Ascension droite (α) 13h 40m 39,9s[1]
Déclinaison (δ) 38° 47′ 39″ [1]
Magnitude apparente (V) 13,5[2]
14,3dans la Bande B [2]
Brillance de surface 13,11 mag/am2[2]
Dimensions apparentes (V) 1,4′ × 0,5′[2]
Décalage vers le rouge 0,019735 ± 0,000010[1]
Angle de position 56°[2]

Localisation dans la constellation : Chiens de chasse

(Voir situation dans la constellation : Chiens de chasse)
Astrométrie
Vitesse radiale 5 916 ± 3 km/s [1]
Distance 90,22 ± 6,32 Mpc (∼294 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie spirale
Type de galaxie SBb[1] SBb/R[3] SBb[2] SBb?[4]
Dimensions environ 29,87 kpc (∼97 400 al)[1],[a]
Découverte
Découvreur(s) John Herschel [4]
Date [4]
Désignation(s) PGC 48393
UGC 8655
MCG 7-28-49
CGCG 218-36[2]
Liste des galaxies spirales
modifier 

NGC 5267 est une galaxie spirale située dans la constellation des Chiens de chasse. Sa vitesse par rapport au fond diffus cosmologique est de 6 117 ± 14 km/s, ce qui correspond à une distance de Hubble de 90,2 ± 6,3 Mpc (∼294 millions d'al)[1]. NGC 5267 a été découverte par l'astronome britannique John Herschel en 1827.

La classe de luminosité de NGC 5267 est II et elle présente une large raie HI[1]. Selon la base de données Simbad, NGC 5267 est une galaxie LINER, c'est-à-dire une galaxie dont le noyau présente un spectre d'émission caractérisé par de larges raies d'atomes faiblement ionisés[5].

À ce jour, trois mesures non basées sur le décalage vers le rouge (redshift) donnent une distance de 52,967 ± 2,570 Mpc (∼173 millions d'al)[6], ce qui est nettement à l'extérieur des valeurs de la distance de Hubble. Notons cependant que c'est avec la valeur moyenne des mesures indépendantes, lorsqu'elles existent, que la base de données NASA/IPAC calcule le diamètre d'une galaxie et qu'en conséquence le diamètre de NGC 5267 pourrait être d'environ 50,9 kpc (∼166 000 al) si on utilisait la distance de Hubble pour le calculer.

Notes et références

Notes

  1. ↑ Diamètre isophote du relevé SDSS.

Références

  1. ↑ a b c d e f g h et i (en) « Results for object NGC 5267 », NASA/IPAC Extragalactic Database (consulté le ).
  2. ↑ a b c d e f et g « Les données de «Revised NGC and IC Catalog by Wolfgang Steinicke», NGC 5200 à 5299 », sur astrovalleyfield.com (consulté le )
  3. ↑ (en) « NGC 5267 sur HyperLeda » (consulté le )
  4. ↑ a b et c (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 5267 » (consulté le ).
  5. ↑ (en) « Simbad, NGC 5267 -- LINER-type Active Galaxy Nucleus », Simbad (consulté le )
  6. ↑ « Your NED Search Results », sur ned.ipac.caltech.edu (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 5259  •  NGC 5260  •  NGC 5261  •  NGC 5262  •  NGC 5263  •  NGC 5264  •  NGC 5265  •  NGC 5266  •  NGC 5267  •  NGC 5268  •  NGC 5269  •  NGC 5270  •  NGC 5271  •  NGC 5272  •  NGC 5273  •  NGC 5274  •  NGC 5275      

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