NGC 5005

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NGC 5005
Caldwell 29 (50191857313).jpg
NGC 5005 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation Canes Venatici [1]
Right ascension 13h 10m 56.2648s [2]
Declination +37° 03′ 32.559″ [2]
Redshift 0.003156 ± 0.000017
Heliocentric radial velocity 946 ± 5 km/s [2]
Distance 65.48 ± 3.70  Mly (20.075 ± 1.133  Mpc) [2]
Apparent magnitude  (V)10.6 [2]
Characteristics
Type SAB(rs)bc [2]
Size~125,400  ly (38.46  kpc) (estimated) [2]
Apparent size  (V)5.8′ × 2.8′ [2]
Other designations
IRAS 13086+3719, UGC 8256, MCG +06-29-052, PGC 45749, CGCG 189-035, C 29 [2]

NGC 5005, also known as Caldwell 29, is an inclined spiral galaxy in the constellation Canes Venatici. It was discovered by German-British astronomer William Herschel on 1 May 1785. [3] [4] The galaxy has a relatively bright nucleus and a bright disk that contains multiple dust lanes. [5] The galaxy's high surface brightness makes it an object that is visible to amateur astronomers using large amateur telescopes.

Contents

Distance measurements for NGC 5005 vary from 13.7 megaparsecs (45 million light-years) to 34.6 megaparsecs (113 million light-years), averaging about 20 megaparsecs (65 million light-years). [2]

Supernova

One supernova has been observed in NGC 5005: SN 1996ai (Type Ia, mag. 14.5) was discovered by Claudio Bottari on 16 June 1996. [6] [7]

Nucleus

NGC 5005 contains a low ionization nuclear emission region (LINER) nucleus. [8] LINER nuclei contain weakly ionized gas. The power source for the LINER emission has been debated extensively, with some researchers suggesting that LINERs are powered by active galactic nuclei that contain supermassive black holes and other researchers suggesting that LINERs are powered by star formation activity.

X-ray emission

X-ray observations of NGC 5005 have revealed that it contains a variable, point-like hard X-ray source in its nucleus. [9] These results imply that NGC 5005 contains a supermassive black hole. The strong, variable X-ray emission is characteristic of the emission expected from the hot, compressed gas in the environment outside a black hole in an active galactic nucleus.

Companion galaxy

NGC 5005 and the nearby spiral galaxy NGC 5033 comprise a physical galaxy pair. [10] The two galaxies weakly influence each other gravitationally, but they are not yet close enough to each other to be distorted by the tidal forces of the gravitational interaction.

See also

Notes

  1. ↑ R. W. Sinnott, ed. (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN   978-0-933346-51-2.
  2. 1 2 3 4 5 6 7 8 9 10 "Results for object NGC 5005". NASA/IPAC Extragalactic Database. NASA and Caltech . Retrieved 2006-08-24.
  3. ↑ Herschel, W. (1789). "Catalogue of a Second Thousand of New Nebulae and Clusters of Stars; with a Few Introductory Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London . 79: 212–255. Bibcode:1789RSPT...79..212H. doi: 10.1098/rstl.1789.0021 .
  4. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 6261". Celestial Atlas. Retrieved 17 June 2025.
  5. ↑ A. Sandage; J. Bedke (1994). Carnegie Atlas of Galaxies. Washington, D.C.: Carnegie Institution of Washington. ISBN   978-0-87279-667-6.
  6. ↑ Bottari, C.; Nakano, S.; Kushida, Y.; Garnavich, P.; Challis, P.; Kirshner, R.; Berlind, P.; Kleyna, J. (1996). "Supernova 1996ai in NGC 5005". International Astronomical Union Circular (6422): 1. Bibcode:1996IAUC.6422....1B.
  7. ↑ "SN 1996ai". Transient Name Server. IAU . Retrieved 9 December 2024.
  8. ↑ L. C. Ho; A. V. Filippenko; W. L. W. Sargent (1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". Astrophysical Journal Supplement. 112 (2): 315–390. arXiv: astro-ph/9704107 . Bibcode:1997ApJS..112..315H. doi:10.1086/313041. S2CID   17086638.
  9. ↑ Y. Terashima; N. Iyomoto; L. C. Ho; A. F. Ptak (2002). "X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results". Astrophysical Journal Supplement. 139 (1): 1–36. arXiv: astro-ph/0203005 . Bibcode:2002ApJS..139....1T. doi:10.1086/324373. S2CID   1749977.
  10. ↑ G. Helou; E. E. Salpeter; Y. Terzian (1982). "Neutral hydrogen in binary and multiple galaxies". Astronomical Journal. 87: 1443–1464. Bibcode:1982AJ.....87.1443H. doi:10.1086/113235.
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