Astronomy:OGC 139
| OGC 139 | |
|---|---|
 SDSS image of OGC 139 | |
| Observation data (J2000.0 epoch) | |
| Constellation | Hercules |
| Right ascension | 16h 39m 45.96s[1] |
| Declination | +46° 09′ 05.87″[1] |
| Redshift | 0.247128[1] |
| Helio radial velocity | 74,087 ± 18 km/s[1] |
| Distance | 3,572.3 ± 250.1 Mly (1,095.26 ± 76.67 Mpc)[1] |
| Characteristics | |
| Size | ~599,900 ly (183.92 kpc) (estimated)[1] |
| Other designations | |
| 2MASX J16394598+4609058, ASK 116726.0, LEDA 2276277, SDSS J163945.95+460906.1[1] | |
OGC 139 also known as 2MASX J16394598+4609058 is a massive spiral galaxy located in the constellation of Hercules. The redshift of the galaxy is (z) 0.247[1] and it is classified as a super spiral galaxy; a type of massive disk galaxy considered to be star-forming.[2][3]
Description
OGC 139 is categorized as an edge-on spiral galaxy. The isophotal diameter of the galaxy is estimated to be 134 kiloparsecs and it has an apparent luminosity of Lr = 12.0. The bulge fraction ratio is calculated to be B/T = 0.13, with the galactic disk having an inclination of 76° and orientated at the position angle of 28°. The scale of the disk is 3.88 kiloparsecs, with the disk exponential scale of Rd = 32.98.[4]
The total star formation rate of OGC 139 is 1.65 Mʘ per year based on the calculation of the 12 micrometer band by Wide-field Infrared Survey Explorer (WISE). The mass of the stars is calculated to be 11.74 Mʘ based on a W1-band luminosity with the gas mass of 10.9 Mʘ based on the total star formation rate.[2]
A study published in 2021 found the inclination of the galaxy is 76° based on the z-band axial ratio with the major axis position angle found to be 115°.[5] The maximum deprojected speed of the galaxy is found to be vmax = 483 kilometers per seconds at 90 kiloparsecs based on both standard deviation and the hydrogen-alpha rotation curve measurements.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "NED Search results for OGC 139". https://ned.ipac.caltech.edu/byname?objname=OGC+139&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1.
- ↑ 2.0 2.1 2.2 Ogle, Patrick M.; Jarrett, Thomas; Lanz, Lauranne; Cluver, Michelle; Alatalo, Katherine; Appleton, Philip N.; Mazzarella, Joseph M. (2019-10-07). "A Break in Spiral Galaxy Scaling Relations at the Upper Limit of Galaxy Mass". The Astrophysical Journal Letters 884 (1): L11. doi:10.3847/2041-8213/ab459e. ISSN 2041-8205. Bibcode: 2019ApJ...884L..11O.
- ↑ Ogle, Patrick M.; Lanz, Lauranne; Appleton, Philip N.; Helou, George; Mazzarella, Joseph (2019-07-15). "A Catalog of the Most Optically Luminous Galaxies at z < 0.3: Super Spirals, Super Lenticulars, Super Post-mergers, and Giant Ellipticals". The Astrophysical Journal Supplement Series 243 (1): 14. doi:10.3847/1538-4365/ab21c3. ISSN 1538-4365. Bibcode: 2019ApJS..243...14O.
- ↑ Ogle, Patrick M.; Lanz, Lauranne; Nader, Cyril; Helou, George (2016-01-26). "Superluminous Spiral Galaxies". The Astrophysical Journal 817 (2): 109. doi:10.3847/0004-637x/817/2/109. ISSN 0004-637X. Bibcode: 2016ApJ...817..109O.
- ↑ Di Teodoro, Enrico M; Posti, Lorenzo; Ogle, Patrick M; Fall, S Michael; Jarrett, Thomas (2021-09-11). "Rotation curves and scaling relations of extremely massive spiral galaxies". Monthly Notices of the Royal Astronomical Society 507 (4): 5820–5831. doi:10.1093/mnras/stab2549. ISSN 0035-8711. https://academic.oup.com/mnras/article/507/4/5820/6368866.
External links
- OGC 139 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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