Astronomy:NGC 3432

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NGC 3432
SDSS DR14 image of NGC 3432
Observation data (J2000 epoch)
ConstellationLeo Minor
Right ascension 10h 52m 31.132s[1]
Declination+36° 37′ 07.60″[1]
Redshift0.002055[2]
Helio radial velocity613[3]
Distance40.1 ± 5.8 Mly (12.30 ± 1.77 Mpc)[3]
Apparent magnitude (V)11.3[4]
Characteristics
TypeSB(s)m[5]
Size~98,000 ly (30.05 kpc) (estimated)[2]
Apparent size (V)6.5′ × 1.1′[4]
Other designations
IRAS 10497+3653, NGC 3432, Arp 206, UGC 5986, MCG+06-24-028, PGC 32643[6][2]

NGC 3432 is an edge-on spiral galaxy that can be found in the northern constellation of Leo Minor.[7] It was discovered by German-British astronomer William Herschel on March 19, 1787.[8] This galaxy is located at a distance of 40 million light-years (12.3 Mpc) from the Milky Way.[3] It is interacting with UGC 5983, a nearby dwarf galaxy, and features tidal filaments and intense star formation. Because of these features, it was listed in Halton Arp's Atlas of Peculiar Galaxies.[9]

Hubble image of NGC 3432 showing regions of star formation[10]

The morphological classification of NGC 3432 is SB(s)m,[5] which indicates this is a barred Magellanic spiral galaxy (SB) with no inner ring structure (s) and an irregular appearance (m). The galaxy is inclined at an angle of 85°±2° to the plane of the sky[3] with its major axis along a positional angle of 38°, which means it is being viewed from nearly edge-on. It is interacting with the companion galaxy UGC 5983, which is creating features that extend outside the galactic plane, as well as an extended halo of radio emission.[5] The shape of the galaxy is distorted and two tidal tails have been identified. NGC 3432 has an active galactic nucleus of the LINER type with a nuclear HII region.[11]

In May 3, 2000, a candidate nova was detected in this galaxy.[12] It was located 123″ east and 180″ north of the galactic nucleus, and aligned with an H II region (or spiral arm) of the galaxy.[13] This appeared similar to a type IIn supernova (designated SN 2000ch), but it peaked below the typical luminosity of these events. As such, it may have been a "superoutburst" of a luminous variable and thus it could have survived the event.[14] The outburst was found comparable to an eruption of Eta Carinae in the mid–nineteenth century.[15] Multiple subsequent outbursts were observed in 2008 and 2009.[16] It is now classified as a supernova imposter, and is expected to become a core collapse supernova in the future.[17]

See also

References

  1. ↑ 1.0 1.1 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. ↑ 2.0 2.1 2.2 "Results for object NGC 3432". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3432. 
  3. ↑ 3.0 3.1 3.2 3.3 Kourkchi, Ehsan et al. (October 23, 2020), "Cosmicflows-4: The Catalog of ∼10,000 Tully–Fisher Distances", The Astrophysical Journal 902 (2): 145, doi:10.3847/1538-4357/abb66b, ISSN 1538-4357, Bibcode: 2020ApJ...902..145K. 
  4. ↑ 4.0 4.1 Gilmour, Jess K. (2003), The Practical Astronomer's Deep-sky Companion, Springer London, p. 73, ISBN 1-85233-474-6, https://books.google.com/books?id=3IpZrC0BeewC&pg=PA73. 
  5. ↑ 5.0 5.1 5.2 "The Ionized Gas and Radio Halo of NGC 3432 (ARP 206)", Astronomical Journal 113: 2006–2024, June 1997, doi:10.1086/118413, Bibcode: 1997AJ....113.2006E. 
  6. ↑ "NGC 3432". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+3432. 
  7. ↑ "Feeling Edgy" (in en). https://www.spacetelescope.org/images/potw1930a/. 
  8. ↑ Seligman, Courtney. "Celestial Atlas NGC Objects 2850-2899". Celestial Atlas. https://cseligman.com/text/atlas/ngc34.htm#3432. 
  9. ↑ Arp, Halton (1966). Atlas of Peculiar Galaxies. Pasadena, California: California Institute of Technology. http://nedwww.ipac.caltech.edu/level5/Arp/Arp_contents.html. Retrieved 5 Jan 2010. 
  10. ↑ Hubble Traces a Galaxy's Outer Reaches, NASA Hubble Mission Team, Goddard Spaceflight Center, August 2, 2019, https://science.nasa.gov/missions/hubble/hubble-traces-a-galaxys-outer-reaches/, retrieved 2024-03-16. 
  11. ↑ Irwin, Judith A. (April 2000), "High-Resolution Radio Continuum Observations of Edge-on Spiral Galaxies", The Astronomical Journal 119 (4): 1592–1607, doi:10.1086/301287, Bibcode: 2000AJ....119.1592I. 
  12. ↑ Wagner, R. M. et al. (May 2000), Green, D. W. E., ed., "Variable Star in NGC 3432", IAU Circular (7417): 2, Bibcode: 2000IAUC.7417....2W. 
  13. ↑ Papenkova, M.; Li, W. D. (May 2000), Green, D. W. E., ed., "Variable Star in Field of NGC 3432", IAU Circular (7415): 1, Bibcode: 2000IAUC.7415....1P. 
  14. ↑ Green, D. W. E., ed. (May 2000), "Supernova 2000ch in NGC 3432", IAU Circular (7421): 3, Bibcode: 2000IAUC.7421....3F. 
  15. ↑ Wagner, R. M. et al. (April 2004), "Discovery and Evolution of an Unusual Luminous Variable Star in NGC 3432 (Supernova 2000ch)", The Publications of the Astronomical Society of the Pacific 116 (818): 326–336, doi:10.1086/382997, Bibcode: 2004PASP..116..326W. 
  16. ↑ Pastorello, A. et al. (October 2010), "Multiple major outbursts from a restless luminous blue variable in NGC 3432", Monthly Notices of the Royal Astronomical Society 408 (1): 181–198, doi:10.1111/j.1365-2966.2010.17142.x, Bibcode: 2010MNRAS.408..181P. 
  17. ↑ Müller, Ancla et al. (February 2023), "Multi-epoch variability of AT 2000ch (SN 2000ch) in NGC 3432. A radio continuum and optical study", Astronomy & Astrophysics 670: id. A130, doi:10.1051/0004-6361/202142139, Bibcode: 2023A&A...670A.130M. 

Template:NGC objects:3000-3499

Coordinates: Sky map 10h 52m 31.1s, +36° 37′ 08″



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