Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Mario G. Santos"'
Autor:
The HERA Collaboration: Zara Abdurashidova, Tyrone Adams, James E. Aguirre, Paul Alexander, Zaki S. Ali, Rushelle Baartman, Yanga Balfour, Rennan Barkana, Adam P. Beardsley, Gianni Bernardi, Tashalee S. Billings, Judd D. Bowman, Richard F. Bradley, Daniela Breitman, Philip Bull, Jacob Burba, Steve Carey, Chris L. Carilli, Carina Cheng, Samir Choudhuri, David R. DeBoer, Eloy de Lera Acedo, Matt Dexter, Joshua S. Dillon, John Ely, Aaron Ewall-Wice, Nicolas Fagnoni, Anastasia Fialkov, Randall Fritz, Steven R. Furlanetto, Kingsley Gale-Sides, Hugh Garsden, Brian Glendenning, Adélie Gorce, Deepthi Gorthi, Bradley Greig, Jasper Grobbelaar, Ziyaad Halday, Bryna J. Hazelton, Stefan Heimersheim, Jacqueline N. Hewitt, Jack Hickish, Daniel C. Jacobs, Austin Julius, Nicholas S. Kern, Joshua Kerrigan, Piyanat Kittiwisit, Saul A. Kohn, Matthew Kolopanis, Adam Lanman, Paul La Plante, David Lewis, Adrian Liu, Anita Loots, Yin-Zhe Ma, David H. E. MacMahon, Lourence Malan, Keith Malgas, Cresshim Malgas, Matthys Maree, Bradley Marero, Zachary E. Martinot, Lisa McBride, Andrei Mesinger, Jordan Mirocha, Mathakane Molewa, Miguel F. Morales, Tshegofalang Mosiane, Julian B. Muñoz, Steven G. Murray, Vighnesh Nagpal, Abraham R. Neben, Bojan Nikolic, Chuneeta D. Nunhokee, Hans Nuwegeld, Aaron R. Parsons, Robert Pascua, Nipanjana Patra, Samantha Pieterse, Yuxiang Qin, Nima Razavi-Ghods, James Robnett, Kathryn Rosie, Mario G. Santos, Peter Sims, Saurabh Singh, Craig Smith, Hilton Swarts, Jianrong Tan, Nithyanandan Thyagarajan, Michael J. Wilensky, Peter K. G. Williams, Pieter van Wyngaarden, Haoxuan Zheng
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 2, p 124 (2023)
We report the most sensitive upper limits to date on the 21 cm epoch of reionization power spectrum using 94 nights of observing with Phase I of the Hydrogen Epoch of Reionization Array (HERA). Using similar analysis techniques as in previously repor
Externí odkaz:
https://doaj.org/article/ccbac6f812eb4a529df00c97b35f91cd
Autor:
Steven Cunnington, Laura Wolz, Philip Bull, Isabella P Carucci, Keith Grainge, Melis O Irfan, Yichao Li, Alkistis Pourtsidou, Mario G Santos, Marta Spinelli, Jingying Wang
Publikováno v:
Cunnington, S, Wolz, L, Bull, P, Carucci, I P, Grainge, K, Irfan, M O, Spinelli, M & Wang, J 2023, ' The foreground transfer function for Hi intensity mapping signal reconstruction: MeerKLASS and precision cosmology applications ', MNRAS . https://doi.org/10.1093/mnras/stad1567
Blind cleaning methods are currently the preferred strategy for handling foreground contamination in single-dish HI intensity mapping surveys. Despite the increasing sophistication of blind techniques, some signal loss will be inevitable across all s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7bbc921551ceda91815e92473d4d9ed
http://arxiv.org/abs/2302.07034
http://arxiv.org/abs/2302.07034
Autor:
K. Knowles, Matt J. Jarvis, Martin J. Hardcastle, Mario G. Santos, S. M. Randriamampandry, Matthew Prescott, Oleg Smirnov, I. Heywood, Fatemeh Tabatabaei, B. S. Frank, I. Prandoni, Kshitij Thorat, C. L. Hale, Jose Afonso, B. Hugo, I. H. Whittam, J. S. Kenyon, A. R. Taylor, Hertzog L. Bester, Jordan D. Collier, Natasha Maddox, Cyril Tasse, Srikrishna Sekhar, Eric J. Murphy, Roger Deane, Philip Best
Publikováno v:
Heywood, I, Jarvis, M J, Hale, C L, Whittam, I H, Bester, H L, Hugo, B, Kenyon, J S, Prescott, M, Smirnov, O M, Tasse, C, Afonso, J M, Best, P N, Collier, J D, Deane, R P, Frank, B S, Hardcastle, M J, Knowles, K, Maddox, N, Murphy, E J, Prandoni, I, Randriamampandry, S M, Santos, M G, Sekhar, S, Tabatabaei, F, Taylor, A R & Thorat, K 2022, ' MIGHTEE: total intensity radio continuum imaging and the COSMOS / XMM-LSS Early Science fields ', Monthly Notices of the Royal Astronomical Society, vol. 509, no. 2, pp. 2150-2168 . https://doi.org/10.1093/mnras/stab3021
MIGHTEE is a galaxy evolution survey using simultaneous radio continuum, spectro-polarimetry, and spectral line observations from the South African MeerKAT telescope. When complete, the survey will image $\sim$20 deg$^{2}$ over the COSMOS, E-CDFS, EL
Autor:
Emily R. Kuhn, Benjamin Saliwanchik, Kevin Bandura, Michele Bianco, H. Cynthia Chiang, Devin Crichton, Meiling Deng, Sindhu Gaddam, Kit Gerodias, Austin Gumba, Maile Harris, Kavilan Moodley, Mugundhan Vijayaraghavan, Laura Newburgh, Jeffrey Peterson, Elizabeth Pieters, Alexandre Refregier, Ajith Sampath, Mario G. Santos, Onkabetse Sengate, Jonathan Sievers, Ema Smith, William Tyndall, Anthony Walters, Amanda Weltman, Dallas Wulf
Publikováno v:
Ground-based and Airborne Telescopes IX.
Autor:
Francesco Sinigaglia, Giulia Rodighiero, Ed Elson, Mattia Vaccari, Natasha Maddox, Bradley S. Frank, Matt J. Jarvis, Tom Oosterloo, Romeel Davé, Mara Salvato, Maarten Baes, Sabine Bellstedt, Laura Bisigello, Jordan D. Collier, Robin H. W. Cook, Luke J. M. Davies, Jacinta Delhaize, Simon P. Driver, Caroline Foster, Sushma Kurapati, Claudia del P. Lagos, Christopher Lidman, Pavel E. Mancera Piña, Martin J. Meyer, K. Moses Mogotsi, Hengxing Pan, Anastasia A. Ponomareva, Isabella Prandoni, Sambatriniaina H. A. Rajohnson, Aaron S. G. Robotham, Mario G. Santos, Srikrishna Sekhar, Kristine Spekkens, Jessica E. Thorne, Jan M. van der Hulst, O. Ivy Wong
Publikováno v:
Astrophysical Journal Letters, 935(1):L13. IOP PUBLISHING LTD
Sinigaglia, F, Rodighiero, G, Elson, E, Vaccari, M, Maddox, N, Frank, B S, Jarvis, M J, Oosterloo, T, Davé, R, Salvato, M, Baes, M, Bellstedt, S, Bisigello, L, Collier, J D, Cook, R H W, Davies, L J M, Delhaize, J, Driver, S P, Foster, C, Kurapati, S, Lagos, C D P, Lidman, C, Piña, P E M, Meyer, M J, Mogotsi, K M, Pan, H, Ponomareva, A A, Prandoni, I, Rajohnson, S H A, Robotham, A S G, Santos, M G, Sekhar, S, Spekkens, K, Thorne, J E, Hulst, J M V D & Wong, O I 2022, ' MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5* ', Astrophysical Journal Letters, vol. 935, no. 1, L13, pp. 1-9 . https://doi.org/10.3847/2041-8213/ac85ae
ASTROPHYSICAL JOURNAL LETTERS
Sinigaglia, F, Rodighiero, G, Elson, E, Vaccari, M, Maddox, N, Frank, B S, Jarvis, M J, Oosterloo, T, Davé, R, Salvato, M, Baes, M, Bellstedt, S, Bisigello, L, Collier, J D, Cook, R H W, Davies, L J M, Delhaize, J, Driver, S P, Foster, C, Kurapati, S, Lagos, C D P, Lidman, C, Piña, P E M, Meyer, M J, Mogotsi, K M, Pan, H, Ponomareva, A A, Prandoni, I, Rajohnson, S H A, Robotham, A S G, Santos, M G, Sekhar, S, Spekkens, K, Thorne, J E, Hulst, J M V D & Wong, O I 2022, ' MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5* ', Astrophysical Journal Letters, vol. 935, no. 1, L13, pp. 1-9 . https://doi.org/10.3847/2041-8213/ac85ae
ASTROPHYSICAL JOURNAL LETTERS
We present the first measurements of HI galaxy scaling relations from a blind survey at $z>0.15$. We perform spectral stacking of 9023 spectra of star-forming galaxies undetected in HI at $0.23
Comment: 12 pages, 5 figures. Accepted for publicat
Comment: 12 pages, 5 figures. Accepted for publicat
Autor:
Phil Bull, David DeBoer, Adam P. Beardsley, Nipanjana Patra, Ziyaad Halday, Nima Razavi-Ghods, Nicholas S. Kern, Aaron R. Parsons, Piyanat Kittiwisit, Kingsley Gale-Sides, Robert Pascua, Max Tegmark, Judd D. Bowman, Adam Lanman, Samantha Pieterse, James Robnett, Peter Sims, Gianni Bernardi, Peter K. G. Williams, Miguel F. Morales, Chris Carilli, Saul A. Kohn, Zara Abdurashidova, Eloy de Lera Acedo, Zaki S. Ali, Steven R. Furlanetto, Abraham R. Neben, Eunice Matsetela, Randall Fritz, Bojan Nikolic, Aaron Ewall-Wice, Bryna J. Hazelton, Deepthi Gorthi, Richard F. Bradley, Matthew Kolopanis, Jon Ringuette, Brian Glendenning, Matt Dexter, Joshua S. Dillon, Carina Cheng, Paul La Plante, Austin Julius, S. H. Carey, Nithyanandan Thyagarajan, Haoxuan Zheng, David B. Lewis, Mario G. Santos, Daniel C. Jacobs, Joshua Kerrigan, Steven G. Murray, Cresshim Malgas, Jack Hickish, Adrian Liu, James E. Aguirre, Nicolas Fagnoni, Jacob Burba, Yanga Balfour, Lourence Malan, Craig Smith, Raul A. Monsalve, Bradley Greig, Jonathan C. Pober, Andrei Mesinger, Jasper Grobbelaar, Tashalee S. Billings, Zachary E. Martinot, Telalo Lekalake, Matthys Maree, B. K. Gehlot, David MacMahon, Yin-Zhe Ma, Mathakane Molewa, Paul Alexander, Kathryn Rosie, Tshegofalang Mosiane, Nivedita Mahesh, John Ely, Jacqueline N. Hewitt, Angelo Syce
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 506:4578-4592
Precision calibration poses challenges to experiments probing the redshifted 21-cm signal of neutral hydrogen from the Cosmic Dawn and Epoch of Reionization (z~30-6). In both interferometric and global signal experiments, systematic calibration is th
Autor:
Yichao Li, Philip Bull, Steven Cunnington, Jingying Wang, Melis O. Irfan, José Fonseca, Gianni Bernardi, Mario G. Santos, Keith Grainge, Brandon Engelbrecht, M. Spinelli, Paula S. Soares, Alkistis Pourtsidou
Publikováno v:
Wang, J, Santos, M G, Bull, P, Grainge, K, Cunnington, S, Fonseca, J, Irfan, M O, Li, Y, Pourtsidou, A, Soares, P S, Spinelli, M, Bernardi, G & Engelbrecht, B 2021, ' Hi intensity mapping with MeerKAT: Calibration pipeline for multi-dish autocorrelation observations ', Monthly Notices of the Royal Astronomical Society, vol. 505, no. 3, pp. 3698-3721 . https://doi.org/10.1093/mnras/stab1365
While most purpose-built 21cm intensity mapping experiments are close-packed interferometer arrays, general-purpose dish arrays should also be capable of measuring the cosmological 21cm signal. This can be achieved most efficiently if the array is us
Autor:
Max Tegmark, Aaron R. Parsons, Samavarti Gallardo, Angelo Syce, Jon Ringuette, Adam P. Beardsley, Gianni Bernardi, Richard F. Bradley, Matthew Kolopanis, Mario G. Santos, Adrian Liu, Kathryn Rosie, T. L. Grobler, Nicholas S. Kern, Brian Glendenning, Amy S. Igarashi, Siyanda Matika, Daniel C. Jacobs, Carina Cheng, Oleg Smirnov, Nithyanandan Thyagarajan, Haoxuan Zheng, Peter K. G. Williams, Matthys Maree, Roshan K. Benefo, Nathan Mathison, Lourence Malan, Austin Julius, Nima Razavi-Ghods, Cresshim Malgas, B. K. Gehlot, Nicolas Fagnoni, Bryna J. Hazelton, Andrei Mesinger, Chuneeta D. Nunhokee, Jasper Grobbelaar, David MacMahon, Deepthi Gorthi, Léon V. E. Koopmans, Joshua S. Dillon, Steve R. Furlanetto, Abraham R. Neben, Chris Carilli, Tashalee S. Billings, Zachary E. Martinot, Judd D. Bowman, Samantha Pieterse, Paul Alexander, Randall Fritz, James Robnett, Telalo Lekalake, Raddwine Sell, Saul A. Kohn, Eloy de Lera Acedo, Florent Mertens, Alec Josaitis, Bradley Greig, Nipanjana Patra, Craig Smith, Austin F. Fortino, David DeBoer, Miguel F. Morales, Zaki S. Ali, Bojan Nikolic, Aaron Ewall-Wice, Eunice Matsetela, MacCalvin Kariseb, Gcobisa Fadana, Paul M. Chichura, Jack Hickish, James E. Aguirre, Abhik Ghosh, Anita Loots
Publikováno v:
Monthly Notices of the Royal Astronomical Society, vol 495, iss 3
Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2020, 495 (3), pp.2813-2826. ⟨10.1093/mnras/staa1331⟩
Monthly Notices of the Royal Astronomical Society, 495(3), 2813-2826. Oxford University Press
arXiv
Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2020, 495 (3), pp.2813-2826. ⟨10.1093/mnras/staa1331⟩
Monthly Notices of the Royal Astronomical Society, 495(3), 2813-2826. Oxford University Press
arXiv
The key challenge in the observation of the redshifted 21-cm signal from cosmic reionization is its separation from the much brighter foreground emission. Such separation relies on the different spectral properties of the two components, although, in
Autor:
Mario G. Santos, Isabella P. Carucci, Melis O. Irfan, Keith Grainge, Marta Spinelli, Steven Cunnington, Philip Bull, Yichao Li, Jingying Wang
21cm intensity mapping experiments are bringing an influx of high spectral resolution observational data in the $\sim100$ MHz $- 1$ GHz regime. We use pilot $971-1075$ MHz data from MeerKAT in single-dish mode, recently used to test the calibration a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa672577681439dac52f947eb5ec53da
http://arxiv.org/abs/2111.08517
http://arxiv.org/abs/2111.08517
Autor:
Dara Storer, Joshua S. Dillon, Daniel C. Jacobs, Miguel F. Morales, Bryna J. Hazelton, Aaron Ewall‐Wice, Zara Abdurashidova, James E. Aguirre, Paul Alexander, Zaki S. Ali, Yanga Balfour, Adam P. Beardsley, Gianni Bernardi, Tashalee S. Billings, Judd D. Bowman, Richard F. Bradley, Philip Bull, Jacob Burba, Steven Carey, Chris L. Carilli, Carina Cheng, David R. DeBoer, Eloy Lera Acedo, Matt Dexter, Scott Dynes, John Ely, Nicolas Fagnoni, Randall Fritz, Steven R. Furlanetto, Kingsley Gale‐Sides, Brian Glendenning, Deepthi Gorthi, Bradley Greig, Jasper Grobbelaar, Ziyaad Halday, Jacqueline N. Hewitt, Jack Hickish, Tian Huang, Alec Josaitis, Austin Julius, MacCalvin Kariseb, Nicholas S. Kern, Joshua Kerrigan, Piyanat Kittiwisit, Saul A. Kohn, Matthew Kolopanis, Adam Lanman, Paul La Plante, Adrian Liu, Anita Loots, David MacMahon, Lourence Malan, Cresshim Malgas, Zachary E. Martinot, Andrei Mesinger, Mathakane Molewa, Tshegofalang Mosiane, Steven G. Murray, Abraham R. Neben, Bojan Nikolic, Chuneeta Devi Nunhokee, Aaron R. Parsons, Robert Pascua, Nipanjana Patra, Samantha Pieterse, Jonathan C. Pober, Nima Razavi‐Ghods, Daniel Riley, James Robnett, Kathryn Rosie, Mario G. Santos, Peter Sims, Saurabh Singh, Craig Smith, Jianrong Tan, Nithyanandan Thyagarajan, Peter K. G. Williams, Haoxuan Zheng
Publikováno v:
Hydrogen Epoch of Reionization Array (HERA) 2021, ' Automated Detection of Antenna Malfunctions in Large-N Interferometers : A Case Study with the Hydrogen Epoch of Reionization Array ', Radio Science, vol. 57, no. 1, e2021RS007376 . https://doi.org/10.1029/2021RS007376
We present a framework for identifying and flagging malfunctioning antennas in large radio interferometers. We outline two distinct categories of metrics designed to detect outliers along known failure modes of large arrays: cross-correlation metrics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a283eba017b502cc89fef84b2e90f1ed
https://doi.org/10.1002/essoar.10508118.1
https://doi.org/10.1002/essoar.10508118.1