GASP - XIX. AGN and their outflows at the centre of jellyfish galaxies
Por:
Radovich, Mario, Poggianti, Bianca, Jaffe, Yara L., Moretti, Alessia, Bettoni, Daniela, Gullieuszik, Marco, Vulcani, Benedetta, Fritz, Jacopo
Publicada:
1 jun 2019
Resumen:
The GASP survey, based on MUSE data, is unveiling the properties of the
gas in the so-called `jellyfish' galaxies: these are cluster galaxies
with spectacular evidence of gas stripping by ram pressure. In a
previous paper (Poggianti et al.), we selected the seven GASP galaxies
with the most extended tentacles of ionized gas, and based on individual
diagnostic diagrams concluded that at least five of them present clear
evidence for an active galactic nucleus. Here we present a more detailed
analysis of the emission lines properties in these galaxies. Our
comparison of several emission line ratios with both AGN and shock
models show that photoionization by the AGN is the dominant ionization
mechanism. This conclusion is strengthened by the analysis of H beta
luminosities, the presence of nuclear iron coronal lines, and extended
(>10 kpc) emission line regions ionized by the AGN in some of these
galaxies. From emission line profiles, we find the presence of outflows
in four galaxies, and derive mass outflow rates, time-scales, and
kinetic energy of the outflows.
Filiaciones:
Radovich, Mario:
INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
Poggianti, Bianca:
INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
Jaffe, Yara L.:
Univ Valparaiso, Fac Ciencias, Inst Fis & Astron, Avda Gran Bretana 1111,Casilla 5030, Valparaiso, Chile
Moretti, Alessia:
INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
Bettoni, Daniela:
INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
Gullieuszik, Marco:
INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
Vulcani, Benedetta:
INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
Fritz, Jacopo:
Univ Nacl Autonoma Mexico, Inst Radioastron & Astrofis, Campus Morelia,AP 3-72, Mexico City 58089, DF, Mexico
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