NGC 6089

NGC 6089
Image illustrative de l’article NGC 6089
La galaxie lenticulaire NGC 6089.
Données d’observation
(Époque J2000.0)
Constellation Couronne boréale
Ascension droite (α) 16h 12m 40,7s[1]
Déclinaison (δ) 33° 02′ 11″ [1]
Magnitude apparente (V) 13,8 [2]
14,7 dans la Bande B [2]
Brillance de surface 13,13 mag/am2[2]
Dimensions apparentes (V) 0,9 × 0,6 [2]
Décalage vers le rouge 0,032046 ± 0,000093[1]
Angle de position 42°[2]

Localisation dans la constellation : Couronne boréale

(Voir situation dans la constellation : Couronne boréale)
Astrométrie
Vitesse radiale 9 607 ± 28 km/s [1]
Distance 142,50 ± 9,98 Mpc (∼465 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie lenticulaire
Type de galaxie S0/a? pec[3] S0-a[2] S0[4]
Dimensions environ 26,07 kpc (∼85 000 al)[1]
Découverte
Découvreur(s) William Herschel[3]
Date [3]
Désignation(s) PGC 57491
MCG 6-31-1
CGCG 196-4
CGCG 196-91
KUG 1610+331A[2]
Liste des galaxies lenticulaires

NGC 6089 est une galaxie lenticulaire relativement éloignée et située dans la constellation de la Couronne boréale. Sa vitesse par rapport au fond diffus cosmologique est de 9 662 ± 28 km/s, ce qui correspond à une distance de Hubble de 142,5 ± 10,0 Mpc (∼465 millions d'al)[1]. NGC 6089 a été découverte par l'astronome germano-britannique William Herschel en .

La galaxie lenticulaire[3] située au nord-est de NGC 6089 est LEDA 3442030[5]. Sa vitesse radiale est égale à 9 362 ± 3 km/s. Ces deux galaxies forment donc une paire physique de galaxies[1], mais la luminosité de LEDA 3442030 est certes trop faible pour avoir été observée par Herschel[3].

Galaxie à sursaut de formation d'étoiles

NGC 6089 est une galaxie à sursaut de formation d'étoiles[6]. Une intense formation d'étoiles prend place dans NGC 6089 et cela provoque des sursauts de formation d'étoiles qui soufflent les gaz de cette galaxie. Le haut taux de formation d'étoiles serait dû à la collision entre NGC 6089 et la galaxie LEDA 3442030 (aussi désignée comme SDSS J161241.33+330215.7)[6],[5],[7]. La formation d'étoiles produit une forte émission infrarouge, elle est décrite comme l'une des formations les plus actives[6].

Notes et références

  1. a b c d e f g et h (en) « Results for object NGC 6089 », NASA/IPAC Extragalactic Database (consulté le )
  2. a b c d e f et g « Revised NGC and IC Catalog by Wolfgang Steinicke, NGC 6000 à 6099 », sur astrovalleyfield.ca (consulté le )
  3. a b c d et e (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 6089 » (consulté le )
  4. (en) « NGC 6089 », HyperLeda (consulté le )
  5. a et b (en) « Simbad, 2MASX J16124129+3302158 -- Galaxy in Group of Galaxies » (consulté le )
  6. a b et c J. A. Acosta-Pulido, U. Klaas et R. J. Laureijs, « The starburst galaxy NGC 6089: an ISO view », Mars 1999, vol. 427,‎ , p. 849 (lire en ligne, consulté le )
  7. « The starburst galaxy NGC 6089 » Accès libre, sur researchgate.net (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 6081  •  NGC 6082  •  NGC 6083  •  NGC 6084  •  NGC 6085  •  NGC 6086  •  NGC 6087  •  NGC 6088  •  NGC 6089  •  NGC 6090  •  NGC 6091  •  NGC 6092  •  NGC 6093  •  NGC 6094  •  NGC 6095  •  NGC 6096  •  NGC 6097      

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