Astronomy:NGC 7507

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NGC 7507
NGC 7507 (2MASS)
Observation data (J2000 epoch)
ConstellationSculptor
Right ascension 23h 12m 07.595s[1]
Declination−28° 32′ 22.70″[1]
Redshift0.005260±0.000100[2]
Helio radial velocity1,590±21 km/s[3]
Distance80.07 ± 0.46 Mly (24.55 ± 0.14 Mpc)[4]
Apparent magnitude (V)10.6[5]
Apparent magnitude (B)11.60[6]
Characteristics
TypeE0[7]
Mass2×1011[8] M☉
Size91 kly[5]
Apparent size (V)1.987′ × 1.907′[1] (NIR)
Other designations
NGC 7507, MCG-05-54-022; ESO 469-19, AM 2309-284[9]

NGC 7507 is an elliptical galaxy located in the constellation Sculptor. It was discovered by the German-British astronomer William Herschel on October 30, 1783.[10] The galaxy lies at an estimated distance of 80.1 million light-years (24.55 Mpc) from the Milky Way,[4] and has an angular size of 2.0′ × 1.9′ in the near infrared.[1] It is receding with a heliocentric radial velocity of 1,590 km/s.[3]

The morphological classification of NGC 7507 is E0, indicating an elliptical galaxy with an almost perfectly circular profile. This massive galaxy is fairly isolated, although it forms a pair with the barred spiral galaxy NGC 7513.[8] The latter lies at a projected angular separation of 18′.[11] Apart from a central dust lane, NGC 7507 displays neither shells nor tidal features.[11] The stellar halo has two components, with the outer and inner halos counter-rotating.[12]

It is unusual galaxy in that it displays a negligible dark matter profile, showing a constant mass to light ratio.[8] This apparent lack of a dark matter component is difficult to explain in an LCDM cosmology.[12] The globular cluster population around NGC 7507 is very small, being only a tenth the size of other comparable ellipticals. It more closely resembles the globular population of a spiral galaxy.[11]

References

  1. ↑ 1.0 1.1 1.2 1.3 Skrutskie, Michael F. et al. (February 1, 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S. 
  2. ↑ Paturel, G. et al. (2002). "Comparison LEDA/SIMBAD octobre 2002. Catalogue to be published in 2003.". Leda. Bibcode: 2002LEDA.........0P. 
  3. ↑ 3.0 3.1 Ogando, Ricardo L. C. et al. (June 2008). "Line Strengths of Early-Type Galaxies". The Astronomical Journal 135 (6): 2424–2445. doi:10.1088/0004-6256/135/6/2424. Bibcode: 2008AJ....135.2424O. 
  4. ↑ 4.0 4.1 Tully, R. Brent et al. (October 2013). "Cosmicflows-2: The Data". The Astronomical Journal 146 (4): 25. doi:10.1088/0004-6256/146/4/86. 86. Bibcode: 2013AJ....146...86T. 
  5. ↑ 5.0 5.1 Simpson, Phil (2012). Guidebook to the Constellations: Telescopic Sights, Tales, and Myths. The Patrick Moore Practical Astronomy Series. Springer Science & Business Media. p. 800. ISBN 9781441969415. https://books.google.com/books?id=7gde2t9ta4QC&pg=PA800. 
  6. ↑ Lauberts, A.; Valentijn, E. A. (1989). The Surface Photometry Catalogue of the ESO-Uppsala Galaxies. Bibcode: 1989spce.book.....L. 
  7. ↑ "NASA/IPAC Extragalactic Database". Results for NGC 7507. http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+7507. 
  8. ↑ 8.0 8.1 8.2 Salinas, R. et al. (February 2012). "Kinematic properties of the field elliptical NGC 7507". Astronomy & Astrophysics 538: id. A87. doi:10.1051/0004-6361/201116517. Bibcode: 2012A&A...538A..87S. 
  9. ↑ "NGC 7507". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+7507. 
  10. ↑ Seligman, Courtney. "New General Catalog Objects: NGC 7500 - 7549". https://cseligman.com/text/atlas/ngc75.htm#7507. 
  11. ↑ 11.0 11.1 11.2 Caso, J. P. et al. (July 2013). "The paucity of globular clusters around the field elliptical NGC 7507". Astronomy & Astrophysics 555: id. A56. doi:10.1051/0004-6361/201321032. Bibcode: 2013A&A...555A..56C. 
  12. ↑ 12.0 12.1 Lane, Richard R. et al. (February 2015). "Dark matter deprivation in the field elliptical galaxy NGC 7507". Astronomy & Astrophysics 574: id. A93. doi:10.1051/0004-6361/201424074. Bibcode: 2015A&A...574A..93L. 

Template:NGC objects:7500-7840



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