| Tololo 1247-232 (T1247) | |
|---|---|
_TOLOLO-1247-232.png) | |
| Observation data (J2000 epoch) | |
| Constellation | Hydra |
| Right ascension | 12h 50m 18.80s |
| Declination | −23° 33′ 57.0″ |
| Redshift | 0.0480 |
| Distance | 652 million ly |
| Apparent magnitude (V) | −21 |
| Characteristics | |
| Type | Starburst galaxy |
| Notable features | Lyman Continuum leaker |
| Other designations | |
| Tol 1247, EC 12476-2317, To 1247, PGC 83589 | |
Tololo 1247-232 (Tol 1247 or T1247) is a small galaxy at a distance of 652 million light-years (200 million parsecs) (redshift z=0.0480).[1] It is situated in the southern equatorial constellation of Hydra. Visually, Tol 1247 appears to be an irregular or possibly a barred spiral galaxy.[2] Tol 1247 is named after the surveys that were carried at the Cerro Tololo Inter-American Observatory (CTIO), the first of which was in 1976.[3] It is one of nine galaxies in the local universe known to emit Lyman continuum photons.[4][5][6]
- ^ E. Leitet; N. Bergvall; M. Hayes; S. Linné; et al. (2013). "Escape of Lyman continuum radiation from local galaxies. Detection of leakage from the young starburst Tol 1247-232". Astronomy & Astrophysics. 553: A106. arXiv:1302.6971. Bibcode:2013A&A...553A.106L. doi:10.1051/0004-6361/201118370. S2CID 118476876.
- ^ U. Christoffer Fremling (6 June 2013). "Leakage of ionizing radiation from the nearby galaxy Tololo 1247-232" (PDF). The University of Stockholm. pp. 1–117. Retrieved 4 February 2015.
- ^ M.G. Smith; C. Aguirre; M. Zemelman (1976). "Emission-line galaxies and quasars. II - The classification systems and list N1, declination not exceeding about -27.5 deg, galactic latitude not less than about +20 deg". Astrophysical Journal Supplement Series. 32: 217–231. Bibcode:1976ApJS...32..217S. doi:10.1086/190397.
- ^ Dawn Erb (2016). "Cosmology: Photons from dwarf galaxy zap hydrogen". Nature. 529 (7585): 159–160. Bibcode:2016Natur.529..159E. doi:10.1038/529159a. PMID 26762452.
- ^ Y.I. Izotov; I. Orlitova; D. Schaerer; T.X. Thuan; A. Verhamme; N.G. Guseva; G. Worseck (2016). "Eight per cent leakage of Lyman continuum photons from a compact, star-forming dwarf galaxy". Nature. 529 (7585): 178–180. arXiv:1601.03068. Bibcode:2016Natur.529..178I. doi:10.1038/nature16456. PMID 26762455. S2CID 3033749.
- ^ Y. I. Izotov; D. Schaerer; T. X. Thuan; G. Worseck; N. G. Guseva; I. Orlitova; A. Verhamme (October 2016). "Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies". MNRAS. 461 (4): 3683–3701. arXiv:1605.05160. Bibcode:2016MNRAS.461.3683I. doi:10.1093/mnras/stw1205.