Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Garrel, Christian"'
Autor:
Kleinebreil, Florian, Grandis, Sebastian, Schrabback, Tim, Ghirardini, Vittorio, Chiu, I-Non, Liu, Ang, Kluge, Matthias, Reiprich, Thomas H., Artis, Emmanuel, Bahar, Emre, Balzer, Fabian, Bulbul, Esra, Clerc, Nicolas, Comparat, Johan, Garrel, Christian, Gruen, Daniel, Li, Xiangchong, Miyatake, Hironao, Miyazaki, Satoshi, Ramos-Ceja, Miriam E., Sanders, Jeremy, Seppi, Riccardo, Okabe, Nobuhiro, Zhang, Xiaoyuan
We aim to participate in the calibration of the X-ray photon count rate to halo mass scaling relation of galaxy clusters selected in the first eROSITA All-Sky Survey on the Western Galactic Hemisphere (eRASS1) using KiDS-1000 weak-lensing (WL) data.
Externí odkaz:
http://arxiv.org/abs/2402.08456
Cosmological studies have now entered Stage IV according to the Dark Energy Task Force prescription, thanks to new missions (Euclid, Rubin Observatory, SRG/eROSITA) that are expected to provide the required ultimate accuracy in the dark energy (DE) e
Externí odkaz:
http://arxiv.org/abs/2312.04253
Autor:
Krippendorf, Sven, Perez, Nicolas Baron, Bulbul, Esra, Kara, Melih, Seppi, Riccardo, Comparat, Johan, Artis, Emmanuel, Bahar, Emre, Garrel, Christian, Ghiardini, Vittorio, Kluge, Matthias, Liu, Ang, Ramos-Ceja, Miriam E., Sanders, Jeremy, Zhang, Xiaoyuan, Brüggen, Marcus, Grandis, Sebastian, Weller, Jochen
We develop a neural network based pipeline to estimate masses of galaxy clusters with a known redshift directly from photon information in X-rays. Our neural networks are trained using supervised learning on simulations of eROSITA observations, focus
Externí odkaz:
http://arxiv.org/abs/2305.00016
Autor:
Koribalski, Bärbel S., Veronica, Angie, Dolag, Klaus, Reiprich, Thomas H., Brüggen, Marcus, Heywood, Ian, Andernach, Heinz, Dettmar, Ralf-Jürgen, Hoeft, Matthias, Zhang, Xiaoyuan, Bulbul, Esra, Garrel, Christian, Józsa, Gyula I. G., English, Jayanne
We present the serendipitous discovery of (1) a large double radio relic associated with the galaxy cluster PSZ2 G277.93+12.34 and (2) a new odd radio circle, ORC J1027-4422, both found in the same deep MeerKAT 1.3 GHz wide-band radio continuum image
Externí odkaz:
http://arxiv.org/abs/2304.11784
Autor:
Bhargava, Sunayana, Garrel, Christian, Koulouridis, Elias, Pierre, Marguerite, Valtchanov, Ivan, Cerardi, Nicolas, Maughan, Ben J., Aguena, Michel, Benoist, Christophe, Baguley, Cale, Ramos-Ceja, Miriam E., Adami, Christophe, Chiappetti, Lucio, Vignali, Cristian, Willis, Jon P.
Publikováno v:
A&A 673, A92 (2023)
X-ray observations of galaxy clusters are impacted by the presence of active galactic nuclei (AGNs) in a manner that is challenging to quantify, leading to biases in the detection and measurement of cluster properties for both astrophysics and cosmol
Externí odkaz:
http://arxiv.org/abs/2301.11196
Autor:
Garrel, Christian, Pierre, Marguerite, Valageas, Patrick, Eckert, Dominique, Marulli, Federico, Veropalumbo, Alfonso, Pacaud, Florian, Clerc, Nicolas, Sereno, Mauro, Umetsu, Keiichi, Moscardini, Lauro, Bhargava, Sunayana, Adami, Christophe, Chiappetti, Lucio, Gastaldello, Fabio, Koulouridis, Elias, Fevre, Jean-Paul Le, Plionis, Manolis
Publikováno v:
A&A 663, A3 (2022)
We present the forward cosmological analysis of an $XMM$ selected sample of galaxy clusters out to a redshift of unity. Following our previous 2018 study based on the dn/dz quantity alone, we perform an upgraded cosmological analysis of the same XXL
Externí odkaz:
http://arxiv.org/abs/2109.13171
Autor:
Kosiba, Matej, Lieu, Maggie, Altieri, Bruno, Clerc, Nicolas, Faccioli, Lorenzo, Kendrew, Sarah, Valtchanov, Ivan, Sadibekova, Tatyana, Pierre, Marguerite, Hroch, Filip, Werner, Norbert, Burget, Lukáš, Garrel, Christian, Koulouridis, Elias, Gaynullina, Evelina, Molham, Mona, Ramos-Ceja, Miriam E., Khalikova, Alina
Galaxy clusters appear as extended sources in XMM-Newton images, but not all extended sources are clusters. So, their proper classification requires visual inspection with optical images, which is a slow process with biases that are almost impossible
Externí odkaz:
http://arxiv.org/abs/2006.05998
Akademický článek
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Diffusive Shock Acceleration (DSA) cannot efficiently accelerate particles without the presence of self-consistently generated or pre-existing strong turbulence ($ \delta B/B \sim 1 $) in the vicinity of the shock. The problem we address in this arti
Externí odkaz:
http://arxiv.org/abs/1805.05143
Akademický článek
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