NGC 7131

NGC 7131
Image illustrative de l’article NGC 7131
La galaxie lenticulaire NGC 7131 par le relevé Pan-STARRS.
Données d’observation
(Époque J2000.0)
Constellation Capricorne
Ascension droite (α) 21h 47m 36,1144s[1]
Déclinaison (δ) −13° 10′ 57,41″ [1]
Magnitude apparente (V) 13,9
14,9 dans la Bande B[2]
Brillance de surface 14,48 mag/am2[2]
Dimensions apparentes (V) 1,7 × 1,0[2]
Décalage vers le rouge 0,010501 ± 0,000003[1]
Angle de position 115°[2]

Localisation dans la constellation : Capricorne

(Voir situation dans la constellation : Capricorne)
Astrométrie
Vitesse radiale 3 148 ± 1 km/s [1]
Distance 75,13 ± 5,28 Mpc (∼245 millions d'al)[1]
Caractéristiques physiques
Type d'objet Galaxie lenticulaire
Type de galaxie (R')SA(rs)0^0^?[1] SO[3],[2],[4]
Dimensions environ 37,23 kpc (∼121 000 al)[1],[a]
Découverte
Découvreur(s) Albert Marth[3]
Date [3]
Désignation(s) PGC 67359
MCG -2-55-2
NPM1G -13.0540[2]
Liste des galaxies lenticulaires

NGC 7131 est une galaxie lenticulaire située dans la constellation du Capricorne. Sa vitesse par rapport au fond diffus cosmologique est de 5 094 ± 26 km/s, ce qui correspond à une distance de Hubble de 75,1 ± 5,3 Mpc (∼245 millions d'al)[1]. NGC 7131 a été découverte par l'astronome allemand Albert Marth en [3].

La galaxie NGC 7131 par le groupe «Legacy Surveys DR10 »[5].

Avec une brillance de surface égale à 14,48 mag/am2, on peut qualifier NGC 7131 de galaxie à faible brillance de surface (LSB en anglais pour low surface brightness). Les galaxies LSB sont des galaxies diffuses (D) avec une brillance de surface inférieure de moins d'une magnitude à celle du ciel nocturne ambiant.

À ce jour, douze mesures non basées sur le décalage vers le rouge (redshift) donnent une distance de 75,367 ± 12,455 Mpc (∼246 millions d'al)[6], ce qui est à l'intérieur des valeurs de la distance de Hubble.

Supernova

La supernova SN 1998co a été découverte dans NGC 7131 le par Wayne Johson[7]. Cette supernova était de type Ia[8] et sa magnitude au moment de sa découverte était de 16[9].

Notes et références

Notes

  1. Diamètre dans les bandes RC3 D_25; R_25 (blue).

Références

  1. a b c d e f g et h (en) « Results for object NGC 7131 », NASA/IPAC Extragalactic Database (consulté le ).
  2. a b c d e et f « Les données de «Revised NGC and IC Catalog by Wolfgang Steinicke», NGC 7100 à 7199 », Sur le site WEB du cours d'astronomie du Cégep de Valleyfield.
  3. a b c et d (en) Courtney Seligman, « Celestial Atlas Table of Contents, NGC 7100 - 7149 » (consulté le ).
  4. (en) « NGC 7131 sur HyperLeda » (consulté le )
  5. (en) « Current Data Release: 10.1 » (consulté le )
  6. « Your NED Search Results, Distance Results for NGC 7131 », sur ned.ipac.caltech.edu (consulté le )
  7. (en) « Wayne Johnson, aka “Mr. Galaxy, Facebook » (consulté le )
  8. (en) « Bright Supernovae - 1998 », Rochester Astronomy (consulté le )
  9. (en) « SN 2017hgz », Transient Name Server (consulté le )

Voir aussi

Articles connexes

Liens externes

    •  NGC 7123  •  NGC 7124  •  NGC 7125  •  NGC 7126  •  NGC 7127  •  NGC 7128  •  NGC 7129  •  NGC 7130  •  NGC 7131  •  NGC 7132  •  NGC 7133  •  NGC 7134  •  NGC 7135  •  NGC 7136  •  NGC 7137  •  NGC 7138  •  NGC 7139      

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