Jump to content

NGC 4332

From Wikipedia, the free encyclopedia
(Redirected from SN 2009an)
NGC 4332
SDSS image of NGC 4332.
Observation data (J2000 epoch)
ConstellationDraco
Right ascension12h 22m 46.7s[1]
Declination65° 50′ 38″[1]
Redshift0.009228[1]
Heliocentric radial velocity2766 km/s[1]
Distance128 Mly (39.2 Mpc)[1]
Group or clusterNGC 4256 Group (NGC 4210 Subgroup)
Apparent magnitude (V)13.3[1]
Characteristics
TypeSB(s)a[1]
Size~102,200 ly (31.34 kpc) (estimated)[1]
Apparent size (V)1.04 x 0.70[1]
Other designations
UGC 07453, PGC 040133, MCG +11-15-048, CGCG 315-033[1]

NGC 4332 is a barred spiral galaxy[2] and a starburst galaxy[3] located 128 million light-years away[2] in the constellation Draco. The galaxy was discovered by astronomer William Herschel on March 20, 1790.[4] NGC 4332 is host to a supermassive black hole with an estimated mass of 9.5×107 solar masses.[5]

NGC 4332 is a member of the NGC 4256 Group,[6][7][8] and is located in a subgroup surrounding the galaxy NGC 4210.[9] The NGC 4256 Group is located within the Canes Venatici-Camelopardalis Cloud,[6] which lies in the First Upper Plane of the Virgo Supercluster.[7]

SN 2009an

[edit]

NGC 4332 has hosted one supernova,[10] a Type Ia supernova designated as SN 2009an that had an apparent magnitude of 15.4. The supernova was discovered by Giancarlo Cortini and Stefano Antonellini with a 35-cm telescope at the Monte Maggiore Observatory in Predappio, Italy on February 27, 2009. It was independently discovered by Petri Kehusmaa of Hyvinkaa, Finland and Mikko Paivinen of Rajamaki, Finland on February 28, 2009, using a 28-cm Schmidt-Cassegrain reflector.[11]

SN 2009an had absolute magntude of -18.841 ± 5 in the blue part of the spectrum. This makes it dimmer than a normal Type Ia supernova. Also, SN 2009an had a light curve that declined a lot faster than a normal Type Ia supernova. Additionally, the bolometric luminosity is estimated at 42.89 erg/s, implying that about 0.41 solar masses of were synthesized in the supernova. However, to account for additional flux lost from UV and NIR light bands, the estimate for the amount of nickel-56 thought to have formed in the supernova increases to 0.50 solar masses. Lastly, spectroscopic data show that SN 2009an has high-velocity features which are observed in the calcium triplet during its pre-maximum and early post-maximum phases. However, the post-maximum spectral evolution resembles a normal Type Ia supernovae, with SN 2009an containing broad Si II 6355 Å lines and Si II 5972 Å lines that are stronger than a normal Type Ia supernova.

These properties make Sn 2009an most similar to another Type Ia supernova known as SN 2004eo. It is thought that supernovae like SN 2009an and SN 2004eo form from the explosion of a white dwarf with lower amounts of kinetic energy than a normal Type Ia supernova and produce more stable elements from the Iron-Group of the periodic table such as iron, nickel and others. These types of Type Ia supernovae account for only 15% of all observed Type Ia supernovae known as non-standard or transitional Type Ia events.[12]

See also

[edit]

References

[edit]
  1. ^ a b c d e f g h i j "NASA/IPAC Extragalactic Database". Results for NGC 4332. Retrieved 2024-06-23.
  2. ^ a b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-06-24.
  3. ^ Koulouridis, Elias; Chavushyan, Vahram; Plionis, Manolis; Krongold, Yair; Dultzin-Hacyan, Deborah (2006-11-01). "A Three-dimensional Study of the Local Environment of Bright IRAS Galaxies: The Active Galactic Nucleus-Starburst Connection". The Astrophysical Journal. 651: 93–100. arXiv:astro-ph/0606365. Bibcode:2006ApJ...651...93K. doi:10.1086/507070. ISSN 0004-637X.
  4. ^ "New General Catalog Objects: NGC 4300 - 4349". cseligman.com. Retrieved 2024-06-24.
  5. ^ Arzoumanian, Zaven; Baker, Paul T.; Brazier, Adam; Brook, Paul R.; Burke-Spolaor, Sarah; Becsy, Bence; Charisi, Maria; Chatterjee, Shami; Cordes, James M.; Cornish, Neil J.; Crawford, Fronefield; Cromartie, H. Thankful; Decesar, Megan E.; Demorest, Paul B.; Dolch, Timothy (2021-06-01). "The NANOGrav 11 yr Data Set: Limits on Supermassive Black Hole Binaries in Galaxies within 500 Mpc". The Astrophysical Journal. 914 (2): 121. arXiv:2101.02716. Bibcode:2021ApJ...914..121A. doi:10.3847/1538-4357/abfcd3. ISSN 0004-637X.
  6. ^ a b Nolthenius, Richard (1993-03-01). "A Revised Catalog of CfA1 Galaxy Groups in the Virgo/Great Attractor Flow Field". The Astrophysical Journal Supplement Series. 85: 1. Bibcode:1993ApJS...85....1N. doi:10.1086/191753. hdl:2060/19930017536. ISSN 0067-0049.
  7. ^ a b Fouque, P.; Gourgoulhon, E.; Chamaraux, P.; Paturel, G. (1992-05-01). "Groups of galaxies within 80 Mpc. II. The catalogue of groups and group members". Astronomy and Astrophysics Supplement Series. 93: 211–233. Bibcode:1992A&AS...93..211F. ISSN 0365-0138.
  8. ^ Garcia, A. M. (1993-07-01). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47–90. Bibcode:1993A&AS..100...47G. ISSN 0365-0138.
  9. ^ Giuricin, Giuliano; Marinoni, Christian; Ceriani, Lorenzo; Pisani, Armando (2000-11-01). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups". The Astrophysical Journal. 543: 178–194. Bibcode:2000ApJ...543..178G. doi:10.1086/317070. ISSN 0004-637X.
  10. ^ "List of supernovae sorted by host name". Bright Supernova - Archives. Retrieved 2024-06-24.
  11. ^ Green, Daniel W. E. (2009-02-28). "SUPERNOVA 2009an IN NGC 4332". Central Bureau for Astronomical Telegrams. International Astronomical Union. Archived from the original on 2012-10-06. Retrieved 2024-06-24.
  12. ^ Sahu, D. K.; Anupama, G. C.; Anto, P. (2013-04-01). "Photometric and spectroscopic evolution of supernova SN 2009an: another case of a transitional Type Ia event". Monthly Notices of the Royal Astronomical Society. 430 (2): 869–887. Bibcode:2013MNRAS.430..869S. doi:10.1093/mnras/sts609. ISSN 0035-8711.
[edit]
Wikimedia Commons has media related to NGC 4332.
Retrieved from "https://en.wikipedia.org/w/index.php?title=NGC_4332&oldid=1258105583"