IC 4687
| IC 4687 | |
|---|---|
| HST image of IC 4687 (center). | |
| Observation data (J2000 epoch) | |
| Constellation | Pavo |
| Right ascension | 18h 13m 39.70s |
| Declination | −57° 43′ 30.97″ |
| Redshift | 0.017345 |
| Heliocentric radial velocity | 5,200 km/s |
| Distance | 253 Mly (76.95 Mpc) |
| Apparent magnitude (V) | 0.33 |
| Apparent magnitude (B) | 0.43 |
| Characteristics | |
| Type | Sb, Sd, HI;LIRG |
| Size | 70,000 ly (estimated) |
| Apparent size (V) | 1.3' x 0.9' |
| Other designations | |
| ESO 140-IG10, IRAS 18093-5744, PGC 61602, FAIRALL 045 | |
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IC 4687 known as IRAS 18093-5744 or F18093-5744, is an Sb spiral galaxy [1] located in the constellation of Pavo. It is located 250 million light years from Earth [2] and was discovered by Royal Harwood Frost on August 1, 1904, who described the object "as brighter middle with magnitude of 14.[3] It has a surface brightness of 12.5.[4]
Characteristics
[edit ]IC 4687 is classified as a luminous infrared galaxy. It has an infrared-luminosity of 1011.3 LΘ, compatible with a star formation rate of 30 MΘ yr−1.[5] Through it has an energy output dominated by its star formation, the galaxy has a weak active galactic nucleus.[6]
The regions of IC 4687 are also known to contain high amounts of molecular gas surface densities of log ΣH2 (MΘ pc−2) = 2.9 ± 0.2. In additional, the galaxy is known to produce stars at a rapid rate when compared to normal star forming galaxies with the regions having log ΣSFR (MΘ yr−1 kpc−2) = 0.7 ± 0.4. This units are considered ~ 10 factor higher when compared to extreme values of nearby galaxies.[6] Not to mention, IC 4687 has a velocity field mainly controlled by rotation. It also has a defined kinematic center that is synchronous with its nucleus.[7]
IC 4687 forms an interacting galaxy trio with two other galaxies, IC 4686 and IC 4689.[8] Both of these galaxies are located ~ 10 and ~ 20 kiloparsecs away from IC 4687 and are classified as spiral-like with their velocity fields influenced by kinematic and rotation centers.[6] Because of its close merger with IC 4686, a starburst and wolf-raynet galaxy, IC 4687 appears distorted. The Hubble images shows the galaxy has a distorted morphology with interstellar dust and gas apparently obscuring its companion.[9] Not to mention, IC 4687 has large curly tidal tail as a result of the merger.[8] It is possible the weak interaction from IC 4686 might triggered its starburst.[6]
References
[edit ]- ^ "IC 4687 - spiral galaxy. Description IC 4687". kosmoved.ru. Retrieved 2024年09月23日.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024年09月23日.
- ^ "Index Catalog Objects: IC 4650 - 4699". cseligman.com. Retrieved 2024年09月23日.
- ^ "Revised IC Data for IC 4687". spider.seds.org. Retrieved 2024年09月23日.
- ^ Pereira-Santaella, M.; Alonso-Herrero, A.; Santos-Lleo, M.; Colina, L.; Jiménez-Bailón, E.; Longinotti, A. L.; Rieke, G. H.; Ward, M.; Esquej, P. (2011年11月01日). "The X-ray emission of local luminous infrared galaxies". Astronomy and Astrophysics. 535: A93. arXiv:1109.0921 . Bibcode:2011A&A...535A..93P. doi:10.1051/0004-6361/201117420. ISSN 0004-6361.
- ^ a b c d Pereira-Santaella, M.; Colina, L.; García-Burillo, S.; Planesas, P.; Usero, A.; Alonso-Herrero, A.; Arribas, S.; Cazzoli, S.; Emonts, B.; Piqueras López, J.; Villar-Martín, M. (2016年02月15日). "Sub-kpc star formation law in the local luminous infrared galaxy IC 4687 as seen by ALMA". Astronomy & Astrophysics. 587: A44. arXiv:1601.02427 . doi:10.1051/0004-6361/201527693. ISSN 0004-6361.
- ^ Bellocchi, Enrica; Arribas, Santiago; Colina, Luis; Miralles-Caballero, Daniel (2013年08月30日). "VLT/VIMOS integral field spectroscopy of luminous and ultraluminous infrared galaxies: 2D kinematic properties". Astronomy & Astrophysics. 557: A59. arXiv:1307.1659 . doi:10.1051/0004-6361/201221019. ISSN 0004-6361.
- ^ a b "Hubble Interacting Galaxy IC 4687". HubbleSite. Retrieved 2024年09月23日.
- ^ Rich, J. A.; Kewley, L. J.; Dopita, M. A. (2015年12月07日). "Galaxy Mergers Drive Shocks: An Integral Field Study of Goals Galaxies". The Astrophysical Journal Supplement Series. 221 (2): 28. arXiv:1509.08468 . doi:10.1088/0067-0049/221/2/28. hdl:1885/152663. ISSN 1538-4365.
External links
[edit ]- Media related to IC 4687 at Wikimedia Commons
- IC 4687 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- IC 4687 at SIMBAD
