Astronomy:NGC 4603
| NGC 4603 | |
|---|---|
 A Hubble Space Telescope (HST) image of NGC 4603. | |
| Observation data (J2000 epoch) | |
| Constellation | Centaurus |
| Right ascension | 12h 40m 55.195s[1] |
| Declination | –40° 58′ 35.05″[1] |
| Helio radial velocity | +2561[2] km/s |
| Distance | 106.8 Mly (32.71 Mpc)[2] |
| Apparent magnitude (V) | 12.3[3] |
| Characteristics | |
| Type | SA(s)c |
| Size | 100,000 ly (diameter) |
| Apparent size (V) | 3′.4 × 2′.5[3] |
| Other designations | |
| PGC 42510[3] | |
NGC 4603 is a spiral galaxy located about 107[2] million light years away in the constellation Centaurus. It is a member of the Centaurus Cluster of galaxies, belonging to the section designated "Cen30". The morphological classification is SA(s)c,[4] which indicates it is a pure spiral galaxy with relatively loosely wound arms.[5]
During 1999, this galaxy was the subject of an extended study using the Hubble Space Telescope to locate Cepheid variable stars. A total of 43±7 were found, and the measurement of their periodicity gave a net distance estimate of 108.7+5.5
−4.9 Mly (33.3+1.7
−1.5 Mpc). This is consistent with the distance estimate determined through redshift measurements. As of the time of this study, NGC 4603 was the most distant galaxy for which a distance estimate had been made using Cepheid variable.[6]
On May 21, 2008, supernova SN 2008cn was discovered at a position 23.″2 north and 4.″7 east of the galaxy center. It was determined to be a high-luminosity Type II-P supernova, with a progenitor tentatively identified as a red supergiant with 15 ± 2 solar masses. Based upon the yellowish color, it may have been a member of a binary star system.[7]
References
- ↑ 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 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. https://ui.adsabs.harvard.edu/abs/2006AJ....131.1163S/abstract.
- ↑ 2.0 2.1 2.2 Crook, Aidan C. et al. (February 2007), "Groups of Galaxies in the Two Micron All Sky Redshift Survey", The Astrophysical Journal 655 (2): 790–813, doi:10.1086/510201, Bibcode: 2007ApJ...655..790C.
- ↑ 3.0 3.1 3.2 "NASA/IPAC Extragalactic Database". Results for NGC 4603. http://nedwww.ipac.caltech.edu/.
- ↑ Martínez-García, Eric E.; González-Lópezlira (March 2013), "Signatures of Long-lived Spiral Patterns", The Astrophysical Journal 765 (2): 105, doi:10.1088/0004-637X/765/2/105, Bibcode: 2013ApJ...765..105M.
- ↑ Buta, Ronald J. et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 978-0521820486, https://books.google.com/books?id=g-P7dCbB5MEC&pg=PA16.
- ↑ Newman, Jeffrey A. et al. (October 1999), "A Cepheid Distance to NGC 4603 in Centaurus", The Astrophysical Journal 523 (2): 506–520, doi:10.1086/307764, Bibcode: 1999ApJ...523..506N.
- ↑ Elias-Rosa, Nancy et al. (December 2009), "On the Progenitor of the Type II-Plateau SN 2008cn in NGC 4603", The Astrophysical Journal 706 (2): 1174–1183, doi:10.1088/0004-637X/706/2/1174, Bibcode: 2009ApJ...706.1174E.
External links
 |  |
