Zobrazeno 1 - 10
of 139
pro vyhledávání: '"21cm cosmology"'
Observations of 21cm line from neutral hydrogen promise to be an exciting new probe of astrophysics and cosmology during the Cosmic Dawn and through the Epoch of Reionization (EoR) to when dark energy accelerates the expansion of the Universe. At eac
Externí odkaz:
http://arxiv.org/abs/2311.01422
Autor:
Chu, Xiaoyong, Pradler, Josef
Thermal freeze-out offers an attractive explanation of the dark matter density free from fine-tuning of initial conditions. For dark matter with a mass below tens of MeV, photons, electrons, and neutrinos are the only available direct Standard Model
Externí odkaz:
http://arxiv.org/abs/2310.06611
Autor:
Xu, Zhilei, Hewitt, Jacqueline N., Chen, Kai-Feng, Kim, Honggeun, Dillon, Joshua S., Kern, Nicholas S., Morales, Miguel F., Hazelton, Bryna J., Byrne, Ruby, Fagnoni, Nicolas, Acedo, Eloy de Lera, Abdurashidova, Zara, Adams, Tyrone, Aguirre, James E., Alexander, Paul, Ali, Zaki S., Baartman, Rushelle, Balfour, Yanga, Beardsley, Adam P., Bernardi, Gianni, Billings, Tashalee S., Bowman, Judd D., Bradley, Richard F., Bull, Philip, Burba, Jacob, Carey, Steven, Carilli, Chris L., Cheng, Carina, DeBoer, David R., Dexter, Matt, Eksteen, Nico, Ely, John, Ewall-Wice, Aaron, Fritz, Randall, Furlanetto, Steven R., Gale-Sides, Kingsley, Glendenning, Brian, Gorthi, Deepthi, Greig, Bradley, Grobbelaar, Jasper, Halday, Ziyaad, Hickish, Jack, Jacobs, Daniel C., Julius, Austin, Kariseb, MacCalvin, Kerrigan, Joshua, Kittiwisit, Piyanat, Kohn, Saul A., Kolopanis, Matthew, Lanman, Adam, La Plante, Paul, Liu, Adrian, Loots, Anita, Ma, Yin-zhe, MacMahon, David Harold Edward, Malan, Lourence, Malgas, Cresshim, Malgas, Keith, Marero, Bradley, Martinot, Zachary E., Mesinger, Andrei, Molewa, Mathakane, Mosiane, Tshegofalang, Murray, Steven G., Neben, Abraham R., Nikolic, Bojan, Nuwegeld, Hans, Parsons, Aaron R., Patra, Nipanjana, Pieterse, Samantha, Pober, Jonathan C., Razavi-Ghods, Nima, Robnett, James, Rosie, Kathryn, Sims, Peter, Smith, Craig, Swarts, Hilton, Thyagarajan, Nithyanandan, Van Van Wyngaarden, Pieter, Williams, Peter K. G., Zheng, Haoxuan
Motivated by the desire for wide-field images with well-defined statistical properties for 21cm cosmology, we implement an optimal mapping pipeline that computes a maximum likelihood estimator for the sky using the interferometric measurement equatio
Externí odkaz:
http://arxiv.org/abs/2204.06021
Autor:
Bhopi, Kalyani, Tyndall, Will, Sanghavi, Pranav, Bandura, Kevin, Newburgh, Laura, Gallicchio, Jason
Publikováno v:
Journal of Astronomical Instrumentation, Vol. 11, No. 4 (2022) 2250016 (13 pages)
Foreground mitigation is critical to all next-generation radio interferometers that target cosmology using the redshifted neutral hydrogen 21 cm emission line. Attempts to remove this foreground emission have led to new analysis techniques as well as
Externí odkaz:
http://arxiv.org/abs/2201.11806
Autor:
Cumner, J.1 jmc227@cam.ac.uk, de Lera Acedo, E.1,2, de Villiers, D. I. L.3, Anstey, D.1, Kolitsidas, C. I.4, Gurdon, B.1, Fagnoni, N.1, Alexander, P.1, Bernardi, G.5,6,7, Bevins, H. T. J.1, Carey, S.1, Cavillot, J.8, Chiello, R.9, Craeye, C.8 jmc227@cam.ac.uk , Croukamp, W.3, Ely, J. A.1, Fialkov, A.2,10, Gessey-Jones, T.1, Gueuning, Q.1, Handley, W.1,2
Publikováno v:
Journal of Astronomical Instrumentation. Mar2022, Vol. 11 Issue 1, p1-26. 26p.
In the next few years, the 21cm line will enable direct observations of the Dark Ages, Cosmic Dawn, and Reionization, which represent previously unexplored periods in our cosmic history. With a combination of sky-averaged global signal measurements a
Externí odkaz:
http://arxiv.org/abs/1910.03153
Autor:
Liu, Adrian, Foreman, Simon, Padmanabhan, Hamsa, Chiang, H. Cynthia, Siegel, Seth, Wulf, Dallas, Sievers, Jonathan, Dobbs, Matt, Vanderlinde, Keith
Line-intensity mapping of the 21cm line is a powerful probe of large scale structure at z<6, tracing large-scale structure via neutral hydrogen content that is found within galaxies. In principle, it enables cost-efficient surveys of the matter distr
Externí odkaz:
http://arxiv.org/abs/1910.02889
Publikováno v:
Phys. Rev. D 100, 043540 (2019)
The discoveries of a number of binary black hole mergers by LIGO and VIRGO has reinvigorated the interest that primordial black holes (PBHs) of tens of solar masses could contribute non-negligibly to the dark matter energy density. Should even a smal
Externí odkaz:
http://arxiv.org/abs/1906.07735
Autor:
Farrag, Kareem R. H. A. M.
Here we discuss the recent EDGES observation of a excess in its radio profile and how it can be used to constrain radiative neutrino decays.
Comment: 4 pages, 1 figure, presented at Nuphys 2018, Prospects in Neutrino Physics, December 19-21, 201
Comment: 4 pages, 1 figure, presented at Nuphys 2018, Prospects in Neutrino Physics, December 19-21, 201
Externí odkaz:
http://arxiv.org/abs/1904.08217
Autor:
Carilli, C. L., Nikolic, Bojan, Thyagarajan, Nithyanandan, Gale-Sides, K., Abdurashidova, Zara, Aguirre, James E., Alexander, Paul, Ali, Zaki S., Balfour, Yanga, Beardsley, Adam P., Bernardi, Gianni, Bowman, Judd D., Bradley, Richard F., Burba, Jacob, Cheng, Carina, DeBoer, David R., Dexter, Matt, de~Lera~Acedo, Eloy, Dillon, Joshua S., Ewall-Wice, Aaron, Fadana, Gcobisa, Fagnoni, Nicolas, Fritz, Randall, Furlanetto, Steve R., Ghosh, Abhik, Glendenning, Brian, Greig, Bradley, Grobbelaar, Jasper, Halday, Ziyaad, Hazelton, Bryna J., Hewitt, Jacqueline N., Hickish, Jack, Jacobs, Daniel C., Julius, Austin, Kariseb, MacCalvin, Kohn, Saul A., Kolopanis, Mathew, Lekalake, Telalo, Liu, Adrian, Loots, Anita, MacMahon, David, Malan, Lourence, Malgas, Cresshim, Maree, Matthys, Martinot, Zachary, Matsetela, Eunice, Mesinger, Andrei, Molewa, Mathakane, Morales, Miguel F., Neben, Abraham R., Parsons, Aaron R., Patra, Nipanjana, Pieterse, Samantha, La Plante, Paul, Pober, Jonathan C., Razavi-Ghods, Nima, Ringuette, Jon, Robnett, James, Rosie, Kathryn, Sell, Raddwine, Sims, Peter, Smith, Craig, Syce, Angelo, Williams, Peter K. ~G., Zheng, Haoxuan
New massively redundant low frequency arrays allow for a novel investigation of closure relations in interferometry. We employ commissioning data from the Hydrogen Epoch of Reionization Array to investigate closure quantities in this densely packed g
Externí odkaz:
http://arxiv.org/abs/1805.00953