| IC 4040 | |
|---|---|
 Sloan Digital Sky Survey of IC 4040 | |
| Observation data (J2000epoch) | |
| Constellation | Coma Berenices |
| Right ascension | 13h 00m 37.9s |
| Declination | +28d 03m 26.50s |
| Redshift | 0.025530 |
| Heliocentric radial velocity | 7,556km/s |
| Distance | 353Mly (108.2Mpc) |
| Group orcluster | Coma Cluster |
| Apparent magnitude (V) | 14.76 |
| Characteristics | |
| Type | Sdm, HII |
| Size | 105,000ly |
| Other designations | |
| PGC 44789,CGCG 160-252,MCG +05-31-085,2MASX J13003794+2803266, 74W 019,SDSS J130037.78+280326.8,IRAS F12582+2819, CG 0954, NSA 162814,5C 04.108,NVSS J130037+280323, WBL 426-106, AGC 221406, FOCA 0388,LEDA 44789 | |
IC 4040 is a type SABcspiral galaxy with a bar[1] inComa Berenices.[2] It is located 353 millionlight-years away from theSolar System and has an estimateddiameter of 105,000 light-years making it slightly larger than theMilky Way.[3] IC 4040 was discovered on April 12, 1891, byGuillaume Bigourdan[4] and is a member of theComa Cluster.[5]
IC 4040 is considered ajellyfish galaxy[6] due to its close proximity to the cluster where gas is stripped from the galaxy by the action ofram pressure.[7] A radio continuum tail can seen extending outwards from the galaxy, showing widespread occurrence of relativistic electrons and magnetic fields which is being removed by pressure.[7] The stripped electrons are re-accelerated by turbulence and ICM shocks or by newsupernovae, since massive stars can be found inH II regions that are located in its ram pressure stripped tail.[7]
According to studies, extendedionized gas can be found surrounding IC 4040. This shows increased radial velocities which reaches up between 400 and 800kilometer per seconds within distance from the nucleus of the galaxy.[8] Not to mention, a low velocity filament is found at the southeastern edge of IC 4040 which exhibits blue continuum and strong Hα emission. The widths exceeds 200 Å and much more compared to 1000 Å for some knots, indicating the intensive activity ofstar formation.[8] Some of these filaments show signs of shockemission-line spectra suggestingshock heating plays an important function in excitation and ionization of extended ionized gas.[8] IC 4040 also presents a strongradio source compared to galaxies of type E/SO.[9]
Twosupernovae have been discovered in IC 4040 so far: PTF11gdh in 2011 and SN 2022jo in 2022.
PTF11gdh was discovered on June 21, 2011, in IC 4040 byPalomar Transient Factory.[10] The supernova was located 0" east and 0" south of the nucleus.[10] The supernova wasType la.[10][11]
SN 2022jo[12] was discovered in IC 4040 on January 9, 2022, by a group ofastronomers; Chunpeng Bi, Jianlin Xu, Mi Zhang, Jingyuan Zhao, Guoyou Sun, Jiangao Ruan and Wenjie Zhou fromXingming Observatory.[13] SN 2022jo was found at Right Ascension (13hr 00min 37s .666) and Declination (+28 degrees 0.3' 25".71). It was located 0".0 east and 0".0 north of the nucleus.[14] The supernova wasType II.[13]
