Zobrazeno 11 - 20
of 378
pro vyhledávání: '"Davies, Frederick"'
Autor:
Greig, Bradley, Bosman, Sarah E. I., Davies, Frederick B., Ďurovčíková, Dominika, Fathivavsari, Hassan, Liu, Bin, Meyer, Romain A., Sun, Zechang, D'Odorico, Valentina, Gallerani, Simona, Mesinger, Andrei, Ting, Yuan-Sen
Reconstructing the intrinsic Ly$\alpha$ line flux from high-$z$ QSOs can place constraints on the neutral hydrogen content of the intergalactic medium during reionisation. There are now $\gtrsim10$ different Ly$\alpha$ reconstruction pipelines using
Externí odkaz:
http://arxiv.org/abs/2404.01556
Autor:
Wang, Feige, Yang, Jinyi, Hennawi, Joseph F., Fan, Xiaohui, Yue, Minghao, Bañados, Eduardo, Bechtel, Shane, Bian, Fuyan, Bosman, Sarah, Champagne, Jaclyn B., Davies, Frederick B., Decarli, Roberto, Farina, Emanuele Paolo, Mazzucchelli, Chiara, Venemans, Bram, Walter, Fabian
Protoclusters, the progenitors of galaxy clusters, trace large scale structures in the early Universe and are important to our understanding of structure formation and galaxy evolution. To date, only a handful of protoclusters have been identified in
Externí odkaz:
http://arxiv.org/abs/2402.01844
Autor:
Xie, Zhang-Liang, Banados, Eduardo, Belladitta, Silvia, Mazzucchelli, Chiara, Schindler, Jan-Torge, Davies, Frederick B., Venemans, Bram P.
Blazars are radio-loud Active Galactic Nuclei (AGN) whose jets have a very small angle to our line of sight. Observationally, the radio emission are mostly compact or a compact-core with a 1-sided jet. With 2.5$^{\prime\prime}$ resolution at 3 GHz, t
Externí odkaz:
http://arxiv.org/abs/2401.04009
Autor:
Davies, Frederick B., Bosman, Sarah E. I., Gaikwad, Prakash, Nasir, Fahad, Hennawi, Joseph F., Becker, George D., Haehnelt, Martin G., D'Odorico, Valentina, Bischetti, Manuela, Eilers, Anna-Christina, Keating, Laura C., Kulkarni, Girish, Lai, Samuel, Mazzucchelli, Chiara, Qin, Yuxiang, Satyavolu, Sindhu, Wang, Feige, Yang, Jinyi, Zhu, Yongda
The variations in Ly$\alpha$ forest opacity observed at $z>5.3$ between lines of sight to different background quasars are too strong to be caused by fluctuations in the density field alone. The leading hypothesis for the cause of this excess varianc
Externí odkaz:
http://arxiv.org/abs/2312.08464
The small-scale structure of baryons in the intergalactic medium is intimately linked to their past thermal history. Prior to the $\gtrsim10^4$ K photoheating during the epoch of reionization, cold baryons may have closely traced the clumpy cosmic we
Externí odkaz:
http://arxiv.org/abs/2312.06763
The red damping wing from neutral hydrogen in the intergalactic medium is a smoking-gun signal of ongoing reionization. One potential contaminant of the intergalactic damping wing signal is dense gas associated with foreground galaxies, which can giv
Externí odkaz:
http://arxiv.org/abs/2312.06747
The epoch of hydrogen reionization is complete by $z=5$, but its progression at higher redshifts is uncertain. Measurements of Ly$\alpha$ forest opacity show large scatter at $z<6$, suggestive of spatial fluctuations in neutral fraction ($x_\mathrm{H
Externí odkaz:
http://arxiv.org/abs/2312.01480
Autor:
Khaire, Vikram, Hu, Teng, Hennawi, Joseph F., Burchett, Joseph N., Walther, Michael, Davies, Frederick
We explore the potential of using the low-redshift Lyman-$\alpha$ (Ly$\alpha$) forest surrounding luminous red galaxies (LRGs) as a tool to constrain active galactic nuclei (AGN) feedback models. Our analysis is based on snapshots from the Illustris
Externí odkaz:
http://arxiv.org/abs/2311.08470
The auto-correlation function of the Lyman-$\alpha$ (Ly$\alpha$) forest flux from high-z quasars can statistically probe all scales of the intergalactic medium (IGM) just after the epoch of reionization. The thermal state of the IGM, which is determi
Externí odkaz:
http://arxiv.org/abs/2309.05647
Autor:
Wolfson, Molly, Hennawi, Joseph F., Bosman, Sarah E. I., Davies, Frederick B., Lukić, Zarija, Becker, George D., Chen, Huanqing, Cupani, Guido, D'Odorico, Valentina, Eilers, Anna-Christina, Haehnelt, Martin G., Keating, Laura C., Kulkarni, Girish, Lai, Samuel, Mesinger, Andrei, Walter, Fabian, Zhu, Yongda
Recently, the Lyman-$\alpha$ (Ly$\alpha$) forest flux auto-correlation function has been shown to be sensitive to the mean free path of hydrogen-ionizing photons, $\lambda_{\text{mfp}}$, for simulations at $z \geq 5.4$. Measuring $\lambda_{\text{mfp}
Externí odkaz:
http://arxiv.org/abs/2309.03341