We present observations obtained with the VLT/MUSE optical integral field spectrograph of the radio source 3C 277.3, located at a redshift of 0.085 and associated with the galaxy Coma A. An emission line region fully enshrouds the double-lobed radio source, which is ∼60 kpc × 90 kpc in size. Based on the emission line ratios, we identified five compact knots in which the gas ionization is powered by young stars located as far as ∼60 kpc from the host. The emission line filaments surrounding the radio emission are compatible with ionization from fast shocks (with a velocity of 350-500 km s-1), but a contribution from star formation occurring at the edges of the radio source is likely. Coma A might be a unique example in the local Universe in which the expanding outflow triggers star formation throughout the whole radio source.
The MURALES survey: V. Jet-induced star formation in 3C 277.3 (Coma A) / Capetti A.; Balmaverde B.; Tadhunter C.; Marconi A.; Venturi G.; Chiaberge M.; Baldi R.D.; Baum S.; Gilli R.; Grandi P.; Meyer E.T.; Miley G.; O'Dea C.; Sparks W.; Torresi E.; Tremblay G.. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - ELETTRONICO. - 657:(2022), pp. A114-0. [10.1051/0004-6361/202141965]
The MURALES survey: V. Jet-induced star formation in 3C 277.3 (Coma A)
Balmaverde B.;Marconi A.;Venturi G.;
2022
Abstract
We present observations obtained with the VLT/MUSE optical integral field spectrograph of the radio source 3C 277.3, located at a redshift of 0.085 and associated with the galaxy Coma A. An emission line region fully enshrouds the double-lobed radio source, which is ∼60 kpc × 90 kpc in size. Based on the emission line ratios, we identified five compact knots in which the gas ionization is powered by young stars located as far as ∼60 kpc from the host. The emission line filaments surrounding the radio emission are compatible with ionization from fast shocks (with a velocity of 350-500 km s-1), but a contribution from star formation occurring at the edges of the radio source is likely. Coma A might be a unique example in the local Universe in which the expanding outflow triggers star formation throughout the whole radio source.
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