Astronomy:B2 2249+37
| B2 2249+37 | |
|---|---|
 Pan-STARRS image of B2 2249+37 | |
| Observation data (J2000 epoch) | |
| Constellation | Lacerta |
| Right ascension | 22h 51m 24.45s[1] |
| Declination | +38° 13′ 40.54″[1] |
| Redshift | 0.058701[1] |
| Helio radial velocity | 17282 ± 22 km/s[1] |
| Distance | 856.8 ± 60.0 Mly (262.71 ± 18.39 Mpc)[1] |
| Characteristics | |
| Size | ~163,000 ly (50.1 kpc) (estimated)[1] |
| Other designations | |
| 4C +37.66, LEDA 2121306, IVS B2249+379, 2MASX J22512450+3813414[1] | |
B2 2249+37 known as 4C 37.66, is a radio galaxy located in the constellation of Lacerta. The redshift of this object has been estimated as (z) 0.058[1] and it was first discovered by astronomers from a catalogue of astronomical radio sources in April 1980, whom they depicted the source as very compact and is associated with a 17 magnitude galaxy.[2]
Description
B2 2249+27 is classified as a head-tail radio galaxy located inside a galaxy cluster.[2][3] The source has been found compact.[2] When imaged with Very Large Array (VLA) in 1988, it has an almost resolved appearance with at least two detected components.[4]
Another VLA observation made in 1993 would also show it has an extended radio halo feature shown clearly resolved based on radio mapping made at 5 GHz frequencies, with a flux density of 898 mJy. There is also a presence of a radio core with the total flux density being 29 mJy and a secondary core component.[5] Detections of strong radio polarization is found, with levels reaching up to the maximum of 20%. The magnetic field has been found to be complex.[6]
A study published in October 1995, would find the galaxy has a flat radio spectrum in the northeast direction. However, upon heading towards the southwest direction, the spectrum becomes more steeper, with the locations of the tail regions displaying low values.[3]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "NED Search results for B2 2249+37". https://ned.ipac.caltech.edu/byname?objname=LEDA+2121306&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1.
- ↑ 2.0 2.1 2.2 Katgert-Merkelijn, J.; Lari, C.; Padrielli, L. (April 1980). "Statistical properties of radio sources of intermediate strength." (in en). Astronomy and Astrophysics Supplement Series 40: 91–118. ISSN 0365-0138. https://articles.adsabs.harvard.edu/pdf/1980A%26AS...40...91K.
- ↑ 3.0 3.1 Klein, U.; Mack, K.-H.; Gregorini, L.; Parma, P. (October 1995). "High-frequency radio continuum observations of radio galaxies with low and intermediate luminosities. III. Spectral indices and particle ages." (in en). Astronomy and Astrophysics 303: 427. ISSN 0004-6361. https://ui.adsabs.harvard.edu/scan/manifest/1995A%26A...303..427K?art=true.
- ↑ Gregorini, L.; Padrielli, L.; Parma, P.; Gilmore, G. (July 1988). "Radio galaxies of intermediate strength I. VLA observations." (in en). Astronomy and Astrophysics Supplement Series 74: 107–126. ISSN 0365-0138. https://articles.adsabs.harvard.edu/pdf/1988A%26AS...74..107G.
- ↑ Bondi, M.; Gregorini, L.; Padrielli, L.; Parma, P. (October 1993). "Radio galaxies of intermediate strenght. II. VLA observations." (in en). Astronomy and Astrophysics Supplement Series 101: 431–445. ISSN 0365-0138. https://articles.adsabs.harvard.edu/pdf/1993A%26AS..101..431B.
- ↑ Mack, K.-H.; Gregorini, L.; Parma, P.; Klein, U. (January 1994). "High-frequency radio continuum observations of radio galaxies with low and intermediate luminosity. II. Sources with sizes 4' to 5'" (in en). Astronomy and Astrophysics Supplement Series 103: 157–182. ISSN 0365-0138. https://articles.adsabs.harvard.edu/pdf/1994A%26AS..103..157M.
External links
- B2 2249+37 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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