Zobrazeno 1 - 10
of 937
pro vyhledávání: '"Shanks, T"'
Autor:
Eltvedt, Alice M., Shanks, T., Metcalfe, N., Ansarinejad, B., Barrientos, L. F., Murphy, D. N. A., Alexander, D. M.
We exploit the VST ATLAS quasar/QSO catalogue to perform three measurements of the quasar halo mass profile. First, we make a new estimate of the angular auto-correlation function of $\approx230,000$ ATLAS quasars with $z_{photo}\lesssim 2.5$ and $17
Externí odkaz:
http://arxiv.org/abs/2410.23372
Autor:
Eltvedt, Alice M., Shanks, T., Metcalfe, 1 N., Ansarinejad, B., Barrientos, L. F., Murph, D. N. A., Alexander, D. M.
We cross-correlate a low-contamination subset of the VST ATLAS g < 22.5 quasar catalogue with g < 21.5 galaxy clusters, r < 21 galaxies and r < 19.5 Luminous Red Galaxies (LRGs) to probe their halo mass profiles via quasar magnification bias caused b
Externí odkaz:
http://arxiv.org/abs/2410.23341
Autor:
Eltvedt, Alice, Shanks, T., Metcalfe, N., Ansarinejad, B., Barrientos, L. F., Sharp, R., Malik, U., Murphy, D. N. A., Irwin, M., Wilson, M., Alexander, D. M., Kovacs, A., Garcia-Bellido, J., Ahlen, S., Brooks, D., de la Macorra, A., Font-Ribera, A., Gontcho, S. Gontcho a, Honscheid, K., Meisner, A., Miquel, R., Nie, J., Tarlé, G., Vargas-Magaña, M., Zhou, Z.
We present the VST ATLAS Quasar Survey, consisting of $\sim1,229,000$ quasar (QSO) candidates with $16
Externí odkaz:
http://arxiv.org/abs/2211.07324
Taking advantage of $\sim4700$ deg$^2$ optical coverage of the Southern sky offered by the VST ATLAS survey, we construct a new catalogue of photometrically selected galaxy groups and clusters using the {\sc orca} cluster detection algorithm. The cat
Externí odkaz:
http://arxiv.org/abs/2207.03725
Publikováno v:
A&A 653, A122 (2021)
Contrary to expectations from scenarios of black hole growth driven by galaxy interactions and mergers, dual active galactic nuclei (AGN) with kiloparsec separations are rarely observed and are very difficult to identify, in particular at high redshi
Externí odkaz:
http://arxiv.org/abs/2107.10773
We investigate the `Local Hole', an anomalous under-density in the local galaxy environment, by extending our previous galaxy $K-$band number-redshift and number-magnitude counts to $\approx 90\%$ of the sky. Our redshift samples are taken from the 2
Externí odkaz:
http://arxiv.org/abs/2107.08505
Autor:
Ansarinejad, B., Shanks, T., Bielby, R. M., Metcalfe, N., Infante, L., Murphy, D. N. A., Rosario, D. J., Stach, S. M.
We compare the contribution of Active Galactic Nuclei (AGN) and star-formation towards dust heating in sub-mm galaxies (SMGs). We have used ALMA at $0."1$ resolution to image a complete flux-limited sample of seven sub-mm sources previously shown to
Externí odkaz:
http://arxiv.org/abs/2107.00694
Publikováno v:
2021MNRAS.505.1509S
High redshift sub-millimetre galaxies (SMGs) are usually assumed to be powered by star-formation. However, it has been clear for some time that $>$20% of such sources brighter than $\approx3$mJy host quasars. Here we analyse a complete sample of 12 s
Externí odkaz:
http://arxiv.org/abs/2010.07934
We revisit our mapping of the `Local Hole', a large underdensity in the local galaxy redshift distribution that extends out to redshift, $z\approx0.05$ and a potential source of outflows that may perturb the global expansion rate and thus help mitiga
Externí odkaz:
http://arxiv.org/abs/1909.01878
Autor:
Richard, J., Kneib, J. -P., Blake, C., Raichoor, A., Comparat, J., Shanks, T., Sorce, J., Sahlén, M., Howlett, C., Tempel, E., McMahon, R., Bilicki, M., Roukema, B., Loveday, J., Pryer, D., Buchert, T., Zhao, C.
Publikováno v:
The Messenger, 2019, 175, 50
The 4MOST Cosmology Redshift Survey (CRS) will perform stringent cosmological tests via spectroscopic clustering measurements that will complement the best lensing, cosmic microwave background and other surveys in the southern hemisphere. The combina
Externí odkaz:
http://arxiv.org/abs/1903.02474