Zobrazeno 1 - 10
of 306
pro vyhledávání: '"O'Dea, Christopher P."'
Autor:
Kiehlmann, Sebastian, De La Parra, Philipe Vergara, Sullivan, Andrew, Synani, A., Liodakis, Ioannis, Readhead, Anthony, Graham, Matthew, Begelman, Mitchell, Blandford, Roger, Chatziioannou, Katerina, Ding, Yuanze, Harrison, Fiona, Homan, D., Hovatta, Talvikki, Kulkarni, Shrinivas, Lister, Matthew, Maiolino, Roberto, Max-Moerbeck, Walter, Molina, B., Mroz, Przemyslaw, O'Dea, Christopher, Pavlidou, Vasiliki, Pearson, Timothy J., Aller, Margo, Lawrence, C., Lazio, T. Joseph, O'Neill, S., Prince, Thomas, Ravi, Vikram, Reeves, Rodrigo, Tassis, Konstantinos, Vallisneri, Michele, Zensus, J.
Haystack and Owens Valley Radio Observatory (OVRO) observations recently revealed strong sinusoidal total flux density variations that maintained coherence between 1975 and 2021 in the blazar PKS 2131-021 ($z=1.283)$. This was interpreted as possible
Externí odkaz:
http://arxiv.org/abs/2407.09647
Autor:
Sebastian, Biny, Caproni, Anderson, Kharb, Preeti, Nayana, A. J., Ali, Arshi, Rubinur, K., O'Dea, Christopher P., Baum, Stefi, Nandi, Sumana
Identifying methods to discover dual AGN has proven to be challenging. Several indirect tracers have been explored in the literature, including X/S-shaped radio morphologies and double-peaked (DP) emission lines in the optical spectra. However, the d
Externí odkaz:
http://arxiv.org/abs/2402.12521
Autor:
Omoruyi, Osase, Tremblay, Grant R., Combes, Francoise, Davis, Timothy A., Gladders, Michael D., Vikhlinin, Alexey, Nulsen, Paul, Kharb, Preeti, Baum, Stefi A., O'Dea, Christopher P., Sharon, Keren, Terrazas, Bryan A., Nevin, Rebecca, Schechter, Aimee L., Zuhone, John A., McDonald, Michael, Dahle, Håkon, Bayliss, Matthew B., Connor, Thomas, Florian, Michael, Rigby, Jane R., Vaddi, Sravani
With two central galaxies engaged in a major merger and a remarkable chain of 19 young stellar superclusters wound around them in projection, the galaxy cluster SDSS J1531+3414 ($z=0.335$) offers an excellent laboratory to study the interplay between
Externí odkaz:
http://arxiv.org/abs/2312.06762
Autor:
Daly, Ruth A., Donahue, Megan, O'Dea, Christopher P., Sebastian, Biny, Haggard, Daryl, Lu, Anan
Six archival Chandra observations are matched with eight sets of radio data and studied in the context of the outflow method to measure and study the spin properties of $\rm{Sgr ~A^*}$. Three radio and X-ray data sets obtained simultaneously, or part
Externí odkaz:
http://arxiv.org/abs/2310.12108
Autor:
Duggal, Chetna, O'Dea, Christopher P., Baum, Stefi A., Labiano, Alvaro, Tadhunter, Clive, Worrall, Diana M., Morganti, Raffaella, Tremblay, Grant R., Dicken, Daniel
We present the first systematic search for UV signatures from radio source-driven AGN feedback in Compact Steep Spectrum (CSS) radio galaxies. Owing to their characteristic sub-galactic jets (1-20 kpc projected linear sizes), CSS hosts are excellent
Externí odkaz:
http://arxiv.org/abs/2309.00110
Autor:
Breiding, Peter, Chiaberge, Marco, Lambrides, Erini, Meyer, Eileen T., Willner, S. P., Hilbert, Bryan, Haas, Martin, Miley, George, Perlman, Eric S., Barthel, Peter, O'Dea, Christopher P., Capetti, Alessandro, Wilkes, Belinda, Baum, Stefi A., Macchetto, Duccio F., Tremblay, Grant, Norman, Colin
Publikováno v:
ApJ 963 91 (2024)
While supermassive black holes are ubiquitous features of galactic nuclei, only a small minority are observed during episodes of luminous accretion. The physical mechanism(s) driving the onset of fueling and ignition in these active galactic nuclei (
Externí odkaz:
http://arxiv.org/abs/2305.11804
Autor:
Gordon, Yjan A., O'Dea, Christopher P., Baum, Stefi A., Bechtol, Keith, Duggal, Chetna, Ferguson, Peter S.
Compact Steep Spectrum (CSS) radio sources are active galactic nuclei that have radio jets propagating only on galactic scales, defined as having projected linear sizes (LS) of up to $20\,$kpc. CSS sources are generally hosted by massive early-type g
Externí odkaz:
http://arxiv.org/abs/2304.10538
Autor:
Gordon, Yjan A., Rudnick, Lawrence, Andernach, Heinz, Morabito, Leah K., O'Dea, Christopher P., Achong, Kaylan-Marie, Baum, Stefi A., Bayona-Figueroa, Caryelis, Hooper, Eric J., Mingo, Beatriz, Morris, Melissa E., Vantyghem, Adrian N.
Active Galactic Nuclei (AGN) can often be identified in radio images as two lobes, sometimes connected to a core by a radio jet. This multi-component morphology unfortunately creates difficulties for source-finders, leading to components that are a)
Externí odkaz:
http://arxiv.org/abs/2303.12830
Autor:
Winkel, Nico, Husemann, Bernd, Singha, Mainak, Bennert, Vardha N., Combes, Françoise, Davis, Timothy A., Gaspari, Massimo, Jahnke, Knud, McElroy, Rebecca, O'Dea, Christopher P., Pérez-Torres, Miguel A.
Publikováno v:
A&A 670, A3 (2023)
The interaction between Active Galactic Nuclei (AGN) and their host galaxies is scarcely resolved. Narrow-line Seyfert 1 (NLS1) galaxies are believed to represent AGN at early stages of their evolution and allow to observe AGN feeding and feedback pr
Externí odkaz:
http://arxiv.org/abs/2211.00657
Autor:
Sebastian, Biny, Kharb, Preeti, Lister, Matthew L., Marshall, Herman L., O'Dea, Christopher P., Baum, Stefi A.
We have carried out Chandra, HST, and VLA observations of four MOJAVE blazars that have been previously classified as 'hybrid' (FR I/II) blazars in terms of radio morphology but not total radio power. The motivation of this study is to determine the
Externí odkaz:
http://arxiv.org/abs/2206.13665