Zobrazeno 1 - 10
of 19 734
pro vyhledávání: '"Martín, G."'
The stellar stripping of satellites in cluster haloes is understood to play an important role in the production of intracluster light. Increasingly, cosmological simulations have been utilised to investigate its origin and assembly. However, such sim
Externí odkaz:
http://arxiv.org/abs/2410.19292
Autor:
Nowak, Katarzyna, Krause, Martin G. H., Siegert, Thomas, Forbrich, Jan, Yates, Robert M., Ramírez-Galeano, Laura, Charbonnel, Corinne, Gieles, Mark
Self-enrichment is one of the leading explanations for chemical anomalies in globular clusters. In this scenario, various candidate polluter stars have been proposed to eject gas with altered chemical composition during the self-enrichment process. M
Externí odkaz:
http://arxiv.org/abs/2409.16362
Autor:
Asthana, Shikhar, Haehnelt, Martin G., Kulkarni, Girish, Bolton, James S., Gaikwad, Prakash, Keating, Laura C., Puchwein, Ewald
The relative contribution of emission from stellar sources and accretion onto supermassive black holes to reionization has been brought into focus again by the apparent high abundance of faint AGN at $4\lesssim z\lesssim11$ uncovered by JWST. We inve
Externí odkaz:
http://arxiv.org/abs/2409.15453
Autor:
Jiang, Danyang, Onoue, Masafusa, Jiang, Linhua, Lai, Samuel, Banados, Eduardo, Becker, George D., Bischetti, Manuela, Bosman, Sarah E. I., Davies, Rebecca L., DOdorico, Valentina, Farina, Emanuele Paolo, Haehnelt, Martin G., Mazzucchelli, Chiara, Schindler, Jan-Torge, Walter, Fabian, Zhu, Yongda
The Fe II/Mg II emission line flux ratio in quasar spectra serves as a proxy for the relative Fe to alpha-element abundances in the broad line regions of quasars. Due to the expected different enrichment timescales of the two elements, they can be us
Externí odkaz:
http://arxiv.org/abs/2409.06174
Autor:
La Marca, A., Margalef-Bentabol, B., Wang, L., Gao, F., Goulding, A. D., Martin, G., Rodriguez-Gomez, V., Trager, S. C., Yang, G., Davé, R., Dubois, Y.
Publikováno v:
A&A 690, A326 (2024)
Galaxy mergers represent a fundamental physical process under hierarchical structure formation, but their role in triggering AGNs is still unclear. We aim to investigate the merger-AGN connection using state-of-the-art observations and novel methods
Externí odkaz:
http://arxiv.org/abs/2407.18238
Autor:
Feron, Jennifer, Conaboy, Luke, Bolton, James S., Chapman, Emma, Haehnelt, Martin G., Keating, Laura C., Kulkarni, Girish, Puchwein, Ewald
Recent evidence supporting reionisation ending at redshift z<6 includes the rapid redshift evolution of the mean free path for Lyman-limit photons through the intergalactic medium at 5
Externí odkaz:
http://arxiv.org/abs/2406.19184
Autor:
Bichang'a, B., Kaviraj, S., Lazar, I., Jackson, R. A., Das, S., Smith, D. J. B., Watkins, A. E., Martin, G.
Given their dominance of the galaxy number density, dwarf galaxies are central to our understanding of galaxy formation. While the incidence of AGN and their impact on galaxy evolution has been extensively studied in massive galaxies, much less is kn
Externí odkaz:
http://arxiv.org/abs/2406.11962
In this article we provide simple and provable bounds on the size and shape of the quasiconformal deformation space of the groups $\IZ_p*\IZ_q$, the free product of cyclic groups of order $p$ and $q$, in $\PSL(2,\IC)$ for $3\leq p,q \leq \infty$. Tho
Externí odkaz:
http://arxiv.org/abs/2405.15970
Autor:
Zhu, Yongda, Becker, George D., Bosman, Sarah E. I., Cain, Christopher, Keating, Laura C., Nasir, Fahad, D'Odorico, Valentina, Bañados, Eduardo, Bian, Fuyan, Bischetti, Manuela, Bolton, James S., Chen, Huanqing, D'Aloisio, Anson, Davies, Frederick B., Davies, Rebecca L., Eilers, Anna-Christina, Fan, Xiaohui, Gaikwad, Prakash, Greig, Bradley, Haehnelt, Martin G., Kulkarni, Girish, Lai, Samuel, Puchwein, Ewald, Qin, Yuxiang, Ryan-Weber, Emma V., Satyavolu, Sindhu, Spina, Benedetta, Walter, Fabian, Wang, Feige, Wolfson, Molly, Yang, Jinyi
Recent quasar absorption line observations suggest that reionization may end as late as $z \approx 5.3$. As a means to search for large neutral hydrogen islands at $z<6$, we revisit long dark gaps in the Ly$\beta$ forest in VLT/X-Shooter and Keck/ESI
Externí odkaz:
http://arxiv.org/abs/2405.12275
Autor:
Greig, Bradley, Mesinger, Andrei, Bañados, Eduardo, Becker, George D., Bosman, Sarah E. I., Chen, Huanqing, Davies, Frederick B., D'Odorico, Valentina, Eilers, Anna-Christina, Gallerani, Simona, Haehnelt, Martin G., Keating, Laura, Lai, Samuel, Qin, Yuxiang, Ryan-Weber, Emma, Satyavolu, Sindhu, Wang, Feige, Yang, Jinyi, Zhu, Yongda
The attenuation of Ly$\alpha$ photons by neutral hydrogen in the intergalactic medium (IGM) at $z\gtrsim5$ continues to be a powerful probe for studying the epoch of reionisation. Given a framework to estimate the intrinsic (true) Ly$\alpha$ emission
Externí odkaz:
http://arxiv.org/abs/2404.12585