Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Etherington, Amy"'
Autor:
Nightingale, James. W., Smith, Russell J., He, Qiuhan, O'Riordan, Conor M., Kegerreis, Jacob A., Amvrosiadis, Aristeidis, Edge, Alastair C., Etherington, Amy, Hayes, Richard G., Kelly, Ash, Lucey, John R., Massey, Richard J. Massey Richard J.
Supermassive black holes (SMBHs) are a key catalyst of galaxy formation and evolution, leading to an observed correlation between SMBH mass $M_{\rm BH}$ and host galaxy velocity dispersion $\sigma_{\rm e}$. Outside the local Universe, measurements of
Externí odkaz:
http://arxiv.org/abs/2303.15514
Autor:
Etherington, Amy, Nightingale, James W., Massey, Richard, Tam, Sut-Ieng, Cao, XiaoYue, Niemiec, Anna, He, Qiuhan, Robertson, Andrew, Li, Ran, Amvrosiadis, Aristeidis, Cole, Shaun, Diego, Jose M., Frenk, Carlos S., Frye, Brenda L., Harvey, David, Jauzac, Mathilde, Koekemoer, Anton M., Lagattuta, David J., Limousin, Marceau, Mahler, Guillaume, Sirks, Ellen, Steinhardt, Charles L.
The distribution of mass in galaxy-scale strong gravitational lenses is often modelled as an elliptical power law plus 'external shear', which notionally accounts for neighbouring galaxies and cosmic shear. We show that it does not. Except in a handf
Externí odkaz:
http://arxiv.org/abs/2301.05244
Autor:
Nightingale, James W., He, Qiuhan, Cao, Xiaoyue, Amvrosiadis, Aristeidis, Etherington, Amy, Frenk, Carlos S., Hayes, Richard G., Robertson, Andrew, Cole, Shaun, Lange, Samuel, Li, Ran, Massey, Richard
The cold dark matter (DM) model predicts that every galaxy contains thousands of DM subhalos; almost all other DM models include a physical process that smooths away the subhalos. The subhalos are invisible, but could be detected via strong gravitati
Externí odkaz:
http://arxiv.org/abs/2209.10566
Autor:
Etherington, Amy, Nightingale, James W., Massey, Richard, Robertson, Andrew, Cao, XiaoYue, Amvrosiadis, Aristeidis, Cole, Shaun, Frenk, Carlos S., He, Qiuhan, Lagattuta, David J., Lange, Samuel, Li, Ran
Observations suggest that the dark matter and stars in early-type galaxies `conspire' to produce a surprisingly simple distribution of total mass, $\rho(r)\propto\rho^{-\gamma}$, with $\gamma\approx2$. We measure the distribution of mass in 48 early-
Externí odkaz:
http://arxiv.org/abs/2207.04070
Autor:
He, Qiuhan, Nightingale, James, Robertson, Andrew, Amvrosiadis, Aristeidis, Cole, Shaun, Frenk, Carlos S., Massey, Richard, Li, Ran, Amorisco, Nicola C., Metcalf, R. Benton, Cao, Xiaoyue, Etherington, Amy
Strong gravitational lensing offers a compelling test of the cold dark matter paradigm, as it allows for subhaloes with masses of $\sim10^{9}$ M$_\odot$ and below to be detected. We test commonly-used techniques for detecting subhaloes superposed in
Externí odkaz:
http://arxiv.org/abs/2202.10191
Autor:
Etherington, Amy, Nightingale, James W., Massey, Richard, Cao, XiaoYue, Robertson, Andrew, Amorisco, Nicola C., Amvrosiadis, Aristeidis, Cole, Shaun, Frenk, Carlos S., He, Qiuhan, Li, Ran, Tam, Sut-Ieng
The distribution of dark and luminous matter can be mapped around galaxies that gravitationally lens background objects into arcs or Einstein rings. New surveys will soon observe hundreds of thousands of galaxy lenses, and current, labour-intensive a
Externí odkaz:
http://arxiv.org/abs/2202.09201
Autor:
Cao, Xiaoyue, Li, Ran, Nightingale, J. W., Massey, Richard, Robertson, Andrew, Frenk, Carlos S., Amvrosiadis, Aristeidis, Amorisco, Nicola C., He, Qiuhan, Etherington, Amy, Cole, Shaun, Zhu, Kai
The elliptical power-law (EPL) model of the mass in a galaxy is widely used in strong gravitational lensing analyses. However, the distribution of mass in real galaxies is more complex. We quantify the biases due to this model mismatch by simulating
Externí odkaz:
http://arxiv.org/abs/2110.14554
Autor:
He, Qiuhan, Li, Ran, Frenk, Carlos S., Nightingale, James, Cole, Shaun, Amorisco, Nicola C., Massey, Richard, Robertson, Andrew, Etherington, Amy, Amvrosiadis, Aristeidis, Cao, Xiaoyue
We rederive the number density of intervening line-of-sight haloes relative to lens subhaloes in galaxy-galaxy strong lensing observations, where these perturbers can generate detectable image fluctuations. Previous studies have calculated the detect
Externí odkaz:
http://arxiv.org/abs/2110.04512
Autor:
Amorisco, Nicola C., Nightingale, James, He, Qiuhan, Amvrosiadis, Aristeidis, Cao, Xiaoyue, Cole, Shaun, Etherington, Amy, Frenk, Carlos S., Li, Ran, Massey, Richard, Robertson, Andrew
A defining prediction of the cold dark matter (CDM) cosmological model is the existence of a very large population of low-mass haloes. This population is absent in models in which the dark matter particle is warm (WDM). These alternatives can, in pri
Externí odkaz:
http://arxiv.org/abs/2109.00018
Autor:
Nightingale, James. W., Hayes, Richard G., Kelly, Ashley, Amvrosiadis, Aristeidis, Etherington, Amy, He, Qiuhan, Li, Nan, Cao, XiaoYue, Frawley, Jonathan, Cole, Shaun, Enia, Andrea, Frenk, Carlos S., Harvey, David R., Li, Ran, Massey, Richard J., Negrello, Mattia, Robertson, Andrew
Publikováno v:
Journal of Open Source Software, 6(58), 2525 (2021)
Strong gravitational lensing, which can make a background source galaxy appears multiple times due to its light rays being deflected by the mass of one or more foreground lens galaxies, provides astronomers with a powerful tool to study dark matter,
Externí odkaz:
http://arxiv.org/abs/2106.01384