This is astarburst galaxy that is noteworthy for its vigorousstar formation, which creates an unusualsuperwind[12] of out-flowing gas. This wind is not visible at optical wavelengths, but is prominent in X-rays, and has been observed by theESAXMM-Newton space telescope.[13] The estimatedstar formation rate is7.3 M☉ yr–1, with a density of8.9×10−3M☉ yr−1 kpc−2. Unlike in many other starburst galaxies, the star formation is spread across the disk rather than being more concentrated.[2]
SN 1965H (Type IIP, mag. 14) was discovered by Enrique Chavira on 23 May 1965.[14][15]
ASASSN-14lp (Type Ia, mag. 14.3) was discovered byASAS-SN on 9 December 2014; it was located12″ from the center of the galaxy.[16][17]
SN 2019yvr (TypeIb, mag. 15.882) was discovered byATLAS on 27 December 2019.[18][19] It has a 0.005 redshift. Images of the location of the supernova before the explosion showed the progenitor star was ~19M☉.[20]
Enlarged view of the center of NGC 4666 by the Hubble Space Telescope
^Gingerich, Owen (26 May 1965)."Circular No. 1908".Central Bureau for Astronomical Telegrams. Smithsonian Astrophysical Observatory. Retrieved1 December 2024.
^"SN1965H".Transient Name Server.IAU. Retrieved1 December 2024.
^Smith, K. W.; et al. (2019). "ATLAS19benc (AT2019yvr): Discovery of a candidate SN in NGC 4666 (26 MPC)".Transient Name Server Astronote.161: 1.Bibcode:2019TNSAN.161....1S.
^"SN 2019yvr".Transient Name Server.IAU. Retrieved1 December 2024.
