Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Ighina, Luca"'
Autor:
Ighina, Luca, Caccianiga, Alessandro, Moretti, Alberto, Broderick, Jess W., Leung, James K., Paterson, Sean, Rigamonti, Fabio, Seymour, Nick, Belladitta, Silvia, Drouart, Guillaume, Galvin, Tim J., Hurley-Walker, Natasha
Publikováno v:
A&A 687, A242 (2024)
We present a multi-wavelength analysis, from the radio to the X-ray band, of the redshift $z=6.44$ VIK J2318$-$31 radio-loud (RL) quasi stellar object (QSO), one of the most distant currently known in this class. The work is based on newly obtained (
Externí odkaz:
http://arxiv.org/abs/2405.03741
Autor:
Ighina, Luca
Radio-Loud (RL) Active Galactic Nuclei (AGNs) are among the brightest astrophysical sources at all wavelengths. Their relativistic jets can affect both their Supermassive Black Holes (SMBHs) growth and the surrounding intergalactic medium. While in t
Externí odkaz:
http://arxiv.org/abs/2209.15043
Autor:
Ighina, Luca, Leung, James K., Broderick, Jess W., Drouart, Guillaume, Seymour, Nick, Belladitta, Silvia, Caccianiga, Alessandro, Lenc, Emil, Moretti, Alberto, An, Tao, Galvin, Tim J., Heald, George H., Huynh, Minh T., McConnell, David, Murphy, Tara, Pritchard, Joshua, Quici, Benjamin, Shabala, Stas S., Tingay, Steven J., Turner, Ross J., Wang, Yuanming, White, Sarah V.
Publikováno v:
A&A 663, A73 (2022)
The recent detection of the quasi-stellar object (QSO) VIKING J231818.3$-$311346 (hereafter VIK J2318$-$3113) at redshift $z=6.44$ in the Rapid ASKAP Continuum Survey (RACS) uncovered its radio-loud nature, making it one of the most distant known to
Externí odkaz:
http://arxiv.org/abs/2203.08142
Autor:
Diana, Alessandro, Caccianiga, Alessandro, Moretti, Alberto, Ighina, Luca, Belladitta, Silvia, Della Ceca, Roberto
We present the space density evolution, from z=1.5 up to z=5.5, of the most massive (M$\geq10^9$M$_{\odot}$) black holes hosted in jetted Active Galactic Nuclei(AGNs). The analysis is based on a sample of 380 luminosity-selected ($\lambda$L$_{1350}\g
Externí odkaz:
http://arxiv.org/abs/2202.03444
Autor:
Belladitta, Silvia, Caccianiga, Alessandro, Diana, Alessandro, Moretti, Alberto, Severgnini, Paola, Pedani, Marco, Cassarà, Letizia P., Spingola, Cristiana, Ighina, Luca, Rossi, Andrea, Della Ceca, Roberto
Publikováno v:
A&A 660, A74 (2022)
We report on a LUCI/Large Binocular Telescope near-infrared (NIR) spectrum of PSO J030947.49+271757.31 (hereafter PSO J0309+27), the highest redshift blazar known to date (z$\sim$6.1). From the C$\rm IV$$\lambda$1549 broad emission line we found that
Externí odkaz:
http://arxiv.org/abs/2201.08863
Autor:
Moretti, Alberto, Ghisellini, Gabriele, Caccianiga, Alessandro, Belladitta, Silvia, Della Ceca, Roberto, Ighina, Luca, Sbarrato, Tullia, Severgnini, Paola, Spingola, Cristiana, INAF-OAB, Insubria, U., INAF-IRA
We report on two Chandra observations of the quasar PSO J0309+27, the most distant blazar observed so far (z=6.1), performed eight months apart, in March and November 2020. Previous Swift-XRT observation showed that this object is one of the brightes
Externí odkaz:
http://arxiv.org/abs/2107.09752
Autor:
Caccianiga, Alessandro, Moretti, Alberto, Belladitta, Silvia, Della Ceca, Roberto, Antón, Sonia, Ballo, Lucia, Cicone, Claudia, Dallacasa, Daniele, Gargiulo, Adriana, Ighina, Luca, Marchã, Maria J., Severgnini, Paola
High redshift blazars are an important class of Active Galactic Nuclei (AGN) that can provide an independent estimate of the supermassive black-hole mass function in high redshift radio-loud AGN without the bias due to absorption along the line-of-si
Externí odkaz:
http://arxiv.org/abs/1901.02910
Autor:
Ighina, Luca, Caccianiga, A., Moretti, A., Belladitta, S., Ballo, L., Cicone, C., Della Ceca, R., Severgnini, P., Dallacasa, D.
We present the results of a systematic X-ray analysis of a complete and well-defined sample of 23 high-z (z=4-5.5) blazar candidates selected from the CLASS radio survey. In particular, we have complemented the existing archival data (mostly Chandra)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b59037c86aa3018579ad2e269a15e22