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 56.2s [2]
Declination +37° 03′ 33″ [2]
Redshift 946 ± 5 km/s [2]
Distance ~ 65 e6ly (~ 20 Mpc) [2]
Apparent magnitude  (V)10.6 [2]
Characteristics
Type SAB(rs)bc [2]
Apparent size  (V)5.8′ × 2.8′ [2]
Other designations
UGC 8256, [2] PGC 45749, [2] Caldwell  29

NGC 5005, also known as Caldwell 29, is an inclined spiral galaxy in the constellation Canes Venatici. The galaxy has a relatively bright nucleus and a bright disk that contains multiple dust lanes. [3] 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. [4] [5]

Nucleus

NGC 5005 contains a low ionization nuclear emission region (LINER) nucleus. [6] 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. [7] 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. [8] 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.

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 "NASA/IPAC Extragalactic Database". Results for NGC 5005. Retrieved 2006-08-24.
  3. ↑ A. Sandage; J. Bedke (1994). Carnegie Atlas of Galaxies. Washington, D.C.: Carnegie Institution of Washington. ISBN   978-0-87279-667-6.
  4. ↑ 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.
  5. ↑ "SN 1996ai". Transient Name Server. IAU . Retrieved 9 December 2024.
  6. ↑ 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.
  7. ↑ 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.
  8. ↑ 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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<span class="mw-page-title-main">Seyfert galaxy</span> Class of active galaxies with very bright nuclei

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<span class="mw-page-title-main">Sombrero Galaxy</span> Galaxy in the constellation Virgo

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<span class="mw-page-title-main">NGC 3227</span> Galaxy in the constellation Leo

NGC 3227 is an intermediate spiral galaxy that is interacting with the dwarf elliptical galaxy NGC 3226. The two galaxies are one of several examples of a spiral with a dwarf elliptical companion that are listed in the Atlas of Peculiar Galaxies. Both galaxies may be found in the constellation Leo. It is a member of the NGC 3227 Group of galaxies, which is a member of the Leo II Groups, a series of galaxies and galaxy clusters strung out from the right edge of the Virgo Supercluster.

<span class="mw-page-title-main">NGC 3226</span> Dwarf elliptical galaxy in the constellation Leo

NGC 3226 is a dwarf elliptical galaxy that is interacting with the spiral galaxy NGC 3227. They were both discovered by German-British astronomer William Herschel on 15 February 1784. The two galaxies are one of several examples of a spiral with a dwarf elliptical companion that are listed in the Atlas of Peculiar Galaxies. Both galaxies may be found in the constellation Leo. It is a member of the NGC 3227 Group of galaxies, which is a member of the Leo II Groups, a series of galaxies and galaxy clusters strung out from the right edge of the Virgo Supercluster.

<span class="mw-page-title-main">NGC 5033</span> Galaxy in the constellation Canes Venatici

NGC 5033 is an inclined spiral galaxy located in the constellation Canes Venatici. Distance estimates vary from between 38 and 60 million light years from the Milky Way. The galaxy has a very bright nucleus and a relatively faint disk. Significant warping is visible in the southern half of the disk. The galaxy's relatively large angular size and relatively high surface brightness make it an object that can be viewed and imaged by amateur astronomers. The galaxy's location relatively near Earth and its active galactic nucleus make it a commonly studied object for professional astronomers.

<span class="mw-page-title-main">Low-ionization nuclear emission-line region</span> Type of galactic nucleus

A low-ionization nuclear emission-line region (LINER) is a type of galactic nucleus that is defined by its spectral line emission. The spectra typically include line emission from weakly ionized or neutral atoms, such as O, O+, N+, and S+. Conversely, the spectral line emission from strongly ionized atoms, such as O++, Ne++, and He+, is relatively weak. The class of galactic nuclei was first identified by Timothy Heckman in the third of a series of papers on the spectra of galactic nuclei that were published in 1980.

<span class="mw-page-title-main">NGC 4151</span> Galaxy in the constellation Canes Venatici

NGC 4151 is an intermediate spiral Seyfert galaxy with weak inner ring structure located 15.8 megaparsecs from Earth in the constellation Canes Venatici. The galaxy was first mentioned by William Herschel on March 17, 1787; it was one of the six Seyfert galaxies described in the paper which defined the term. It is one of the nearest galaxies to Earth to contain an actively growing supermassive black hole. The black hole would have a mass on the order of 2.5 million to 30 million solar masses. It was speculated that the nucleus may host a binary black hole, with about 40 million and about 10 million solar masses respectively, orbiting with a 15.8-year period. This is, however, still a matter of active debate.

<span class="mw-page-title-main">NGC 4639</span> Galaxy in the constellation Virgo

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<span class="mw-page-title-main">Ionization cone</span> Astronomical phenomenon

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<span class="mw-page-title-main">NGC 4102</span> Galaxy in the constellation Ursa Major

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<span class="mw-page-title-main">NGC 5643</span> Galaxy in the constellation Lupus

NGC 5643 is an intermediate spiral galaxy in the constellation Lupus. Based on the tip of the red-giant branch distance indicator, it is located at a distance of about 40 million light-years. NGC 5643 has an active galactic nucleus and is a type II Seyfert galaxy.

<span class="mw-page-title-main">NGC 7469</span> Galaxy located in the constellation Pegasus

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<span class="mw-page-title-main">NGC 3367</span> Spiral galaxy in the constellation Leo

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<span class="mw-page-title-main">NGC 7213</span> Galaxy in the constellation Grus

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<span class="mw-page-title-main">NGC 7130</span> Galaxy in the constellation Piscis Austrinus

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<span class="mw-page-title-main">NGC 931</span> Galaxy in the constellation Triangulum

NGC 931 is a spiral galaxy located in the constellation Triangulum. It is located at a distance of circa 200 million light-years from Earth, which, given its apparent dimensions, means that NGC 931 is about 200,000 light years across. It was discovered by Heinrich d'Arrest on September 26, 1865. It is classified as a Seyfert galaxy.

<span class="mw-page-title-main">NGC 3393</span> Galaxy in the constellation Hydra

NGC 3393 is a barred spiral galaxy located in the constellation Hydra. It is located at a distance of circa 180 million light-years from Earth, which, given its apparent dimensions, means that NGC 3393 is about 140,000 light-years across. It was discovered by John Herschel on March 24, 1835. It is a Type II Seyfert galaxy, known to host two supermassive black holes, which are the nearest known pair of supermassive black holes to Earth.

<span class="mw-page-title-main">NGC 5135</span> Galaxy in the constellation Hydra

NGC 5135 is a barred spiral galaxy located in the constellation Hydra. It is located at a distance of about 200 million light years from Earth. It was discovered by John Herschel on May 8, 1834. It is a Seyfert galaxy.

<span class="mw-page-title-main">NGC 5683</span> Galaxy in the constellation Boötes

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