Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/32352
Titolo: | GASP XXXVIII: The LOFAR-MeerKAT-VLA View on the Nonthermal Side of a Jellyfish Galaxy | Autori: | IGNESTI, ALESSANDRO Vulcani, Benedetta POGGIANTI, Bianca Maria Paladino, Rosita Shimwell, Timothy Healy, Julia GITTI, MYRIAM BACCHINI, CECILIA MORETTI, ALESSIA RADOVICH, MARIO van Weeren, Reinout J. Roberts, Ian D. BOTTEON, ANDREA Müller, Ancla McGee, Sean Fritz, Jacopo TOMICIC, NEVEN WERLE, Ariel MINGOZZI, MATILDE GULLIEUSZIK, MARCO Verheijen, Marc |
Data pubblicazione: | 2022 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 924 | Fascicolo: | 2 | Da pagina:: | 64 | Abstract: | Ram pressure stripping is a crucial evolutionary driver for cluster galaxies. It is thought to be able to accelerate the evolution of their star formation, trigger the activity of their central active galactic nucleus (AGN) and the interplay between galactic and environmental gas, and eventually dissipate their gas reservoirs. We explored the outcomes of ram pressure stripping by studying the nonthermal radio emission of the jellyfish galaxy JW100 in the cluster A2626 (z = 0.055), by combining LOw Frequency Array, MeerKAT, and Very Large Array observations from 0.144 to 5.5 GHz. We studied the integrated spectra of the stellar disk, the stripped tail, and the AGN; mapped the spectral index over the galaxy; and constrained the magnetic field intensity to between 11 and 18 μG in the disk and <10 μG in the tail. The stellar disk radio emission is dominated by a radiatively old plasma, likely related to an older phase of a high star formation rate. This suggests that the star formation was quickly quenched by a factor of 4 in a few 10<SUP>7</SUP> yr. The radio emission in the tail is consistent with the stripping scenario, where the radio plasma that originally accelerated in the disk is subsequently displaced in the tail. The morphology of the radio and X-ray emissions supports the scenario of the accretion of magnetized environmental plasma onto the galaxy. The AGN nonthermal spectrum indicates that relativistic electron acceleration may have occurred simultaneously with a central ionized gas outflow, thus suggesting a physical connection between the two processes. | URI: | http://hdl.handle.net/20.500.12386/32352 | URL: | https://iopscience.iop.org/article/10.3847/1538-4357/ac32ce | ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/ac32ce | Bibcode ADS: | 2022ApJ...924...64I | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
Ignesti_2022_ApJ_924_64.pdf | Pdf editoriale | 3.36 MB | Adobe PDF | Visualizza/apri |
Page view(s)
54
controllato il 28-mar-2024
Download(s)
10
controllato il 28-mar-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.