Astronomy:NGC 105
| NGC 105 | |
|---|---|
 Hubble Space Telescope image of NGC 105 (center) and PGC 212515 (upper left) | |
| Observation data (J2000 epoch) | |
| Constellation | Pisces |
| Right ascension | 00h 25m 16.791s[1] |
| Declination | +12° 53′ 01.82″[1] |
| Redshift | 0.017646[2] |
| Helio radial velocity | 5290 km/s[2] |
| Distance | 221.34 ± 34.29 Mly (67.864 ± 10.514 Mpc)[2] |
| Apparent magnitude (B) | 14.1[3] |
| Characteristics | |
| Type | Sab:[2] |
| Size | 83,700 ly (25,660 pc)[2][note 1] |
| Apparent size (V) | 1.1′[2] |
| Other designations | |
| IRAS 00226+1236, UGC 241, MCG+02-02-008, PGC 1583[3] | |
NGC 105 is a spiral galaxy estimated to be about 240 million light-years away in the constellation of Pisces. It was discovered by Édouard Stephan in 1884, and its apparent magnitude is 14.1.[4]
This galaxy is of particular interest to astronomers because it contains both Cepheid variable stars and Type Ia supernovae, allowing for direct cross-calibration of these standard candles used in determining cosmic distances.[5] Observations with the Hubble Space Telescope have detected Cepheid variable in NGC 105, helping to improve measurements of the Hubble constant and the universe's expansion rate through the SH0ES project.[6] Structurally, it exhibits a well-defined central bulge and spiral arms abundant in star-forming regions, characteristic of intermediate-mass spiral galaxies.[7]
Supernovae
Two supernovae have been observed in NGC 105:
- SN 1997cw (Type Ia, mag. 16.5) was discovered by the BAO Supernova Survey on 10 July 1997.[8][9]
- SN 2007A (Type Ia, mag. 16) was discovered by Tim Puckett and Tom Orff, and independently discovered by the Lick Observatory Supernova Search (LOSS), on 2 January 2007.[10][11]
See also
Notes
- ↑ POSS1 103a-O values used.
References
- ↑ 1.0 1.1 Skrutskie, Michael F. 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.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "NED results for object NGC 0105". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+105&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- ↑ 3.0 3.1 "NGC 105". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+105.
- ↑ "NGC Objects: NGC 100 - 149". http://cseligman.com/text/atlas/ngc1.htm#105.
- ↑ "Hubble Sees Cosmic Clues in a Galactic Duo - NASA Science" (in en-US). 2022-01-07. https://science.nasa.gov/missions/hubble/hubble-sees-cosmic-clues-in-a-galactic-duo/.
- ↑ Riess, Adam G.; Yuan, Wenlong; Macri, Lucas M.; Scolnic, Dan; Brout, Dillon; Casertano, Stefano; Jones, David O.; Murakami, Yukei et al. (July 2022). "A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km s-1 Mpc-1 Uncertainty from the Hubble Space Telescope and the SH0ES Team" (in en). The Astrophysical Journal 934 (1): L7. doi:10.3847/2041-8213/ac5c5b. ISSN 0004-637X. https://ui.adsabs.harvard.edu/abs/2022ApJ...934L...7R/abstract.
- ↑ "NGC 105". https://simbad.cds.unistra.fr/simbad/sim-basic.
- ↑ Qiao, Q. -Y.; Qiu, Y. -L.; Li, W. -D.; Zhou, W.; Hu, J. -Y.; Wei, J. -Y. (1997). "Supernova 1997cw in NGC 105". International Astronomical Union Circular (6699): 1. Bibcode: 1997IAUC.6699....1Q. http://www.cbat.eps.harvard.edu/iauc/06600/06699.html#Item1.
- ↑ "SN 1997cw". IAU. https://www.wis-tns.org/object/1997cw.
- ↑ Puckett, T.; Orff, T.; Newton, J.; Madison, D.; Li, W. (2007). "Supernova 2007A in NGC 105 [designation correction to Cbet 794]". Central Bureau Electronic Telegrams 795: 1. Bibcode: 2007CBET..795....1P. http://www.cbat.eps.harvard.edu/cbet/000700/CBET000795.txt.
- ↑ "SN 2007A". IAU. https://www.wis-tns.org/object/2007A.
External links
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