Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Christenson, Holly"'
The relationship between Ly$\alpha$ forest opacity and local galaxy density (the opacity-density relation) is a key observational test of late reionization models. Using narrow-band surveys of z=5.7 Ly$\alpha$ emitters centered on quasar sight lines,
Externí odkaz:
http://arxiv.org/abs/2408.08358
Autor:
Christenson, Holly M., Becker, George D., D'Aloisio, Anson, Davies, Frederick B., Zhu, Yongda, Boera, Elisa, Nasir, Fahad, Furlanetto, Steven R., Malkan, Matthew A.
Observed scatter in the Lyman-alpha opacity of quasar sightlines at $z<6$ has motivated measurements of the correlation between Ly$\alpha$ opacity and galaxy density, as models that predict this scatter make strong and sometimes opposite predictions
Externí odkaz:
http://arxiv.org/abs/2308.13064
Autor:
Zhu, Yongda, Becker, George D., Christenson, Holly M., D'Aloisio, Anson, Bosman, Sarah E. I., Bakx, Tom, D'Odorico, Valentina, Bischetti, Manuela, Cain, Christopher, Davies, Frederick B., Davies, Rebecca L., Eilers, Anna-Christina, Fan, Xiaohui, Gaikwad, Prakash, Haehnelt, Martin G., Keating, Laura C., Kulkarni, Girish, Lai, Samuel, Ma, Hai-Xia, Mesinger, Andrei, Qin, Yuxiang, Satyavolu, Sindhu, Takeuchi, Tsutomu T., Umehata, Hideki, Yang, Jinyi
The mean free path of ionizing photons, $\lambda_{\rm mfp}$, is a critical parameter for modeling the intergalactic medium (IGM) both during and after reionization. We present direct measurements of $\lambda_{\rm mfp}$ from QSO spectra over the redsh
Externí odkaz:
http://arxiv.org/abs/2308.04614
Autor:
Zhu, Yongda, Becker, George D., Bosman, Sarah E. I., Keating, Laura C., D'Odorico, Valentina, Davies, Rebecca L., Christenson, Holly M., Bañados, Eduardo, Bian, Fuyan, Bischetti, Manuela, Chen, Huanqing, Davies, Frederick B., Eilers, Anna-Christina, Fan, Xiaohui, Gaikwad, Prakash, Greig, Bradley, Haehnelt, Martin G., Kulkarni, Girish, Lai, Samuel, Pallottini, Andrea, Qin, Yuxiang, Ryan-Weber, Emma, Walter, Fabian, Wang, Feige, Yang, Jinyi
We present a new investigation of the intergalactic medium (IGM) near reionization using dark gaps in the Lyman-$\beta$ (Ly$\beta$) forest. With its lower optical depth, Ly$\beta$ offers a potentially more sensitive probe to any remaining neutral gas
Externí odkaz:
http://arxiv.org/abs/2205.04569
Autor:
Christenson, Holly M., Becker, George D., Furlanetto, Steven R., Davies, Frederick B., Malkan, Matthew A., Zhu, Yongda, Boera, Elisa, Trapp, Adam
The observed large-scale scatter in Lyman $\alpha$ opacity of the intergalactic medium at $z<6$ implies large fluctuations in the neutral hydrogen fraction that are unexpected long after reionization has ended. A number of models have emerged to expl
Externí odkaz:
http://arxiv.org/abs/2109.13170
Autor:
Zhu, Yongda, Becker, George D., Bosman, Sarah E. I., Keating, Laura C., Christenson, Holly M., Bañados, Eduardo, Bian, Fuyan, Davies, Frederick B., D'Odorico, Valentina, Eilers, Anna-Christina, Fan, Xiaohui, Haehnelt, Martin G., Kulkarni, Girish, Pallottini, Andrea, Qin, Yuxiang, Wang, Feige, Yang, Jinyi
We present a new investigation of the intergalactic medium (IGM) near the end of reionization using "dark gaps" in the Lyman-alpha (Ly$\alpha$) forest. Using spectra of 55 QSOs at $z_{\rm em}>5.5$, including new data from the XQR-30 VLT Large Program
Externí odkaz:
http://arxiv.org/abs/2109.06295
Autor:
Becker, George D., D'Aloisio, Anson, Christenson, Holly M., Zhu, Yongda, Worseck, Gábor, Bolton, James S.
The mean free path of ionizing photons, $\lambda_{\rm mfp}$, is a key factor in the photoionization of the intergalactic medium (IGM). At $z \gtrsim 5$, however, $\lambda_{\rm mfp}$ may be short enough that measurements towards QSOs are biased by the
Externí odkaz:
http://arxiv.org/abs/2103.16610
Publikováno v:
The Astrophysical Journal, 883:17 (10pp), 2019 September 20
We present Keck/OSIRIS infrared IFU observations of the $z = $ 3.153 sub-DLA DLA2233+131, previously detected in absorption to a background quasar and studied with single slit spectroscopy and PMAS integral field spectroscopy (IFU). We used the Laser
Externí odkaz:
http://arxiv.org/abs/1909.08523
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.