Results 1 to 10 of about 239,749 (284)

Primary beam effects of radio astronomy antennas -- II. Modelling the MeerKAT L-band beam [PDF]

, 2021
After a decade of design and construction, South Africa's SKA-MID precursor MeerKAT has begun its science operations. To make full use of the widefield capability of the array, it is imperative that we have an accurate model of the primary beam of its ...
Ansah-Narh, T., Asad, K. M. B., de Villers, M., de Villiers, D. I. L., Girard, J. N., Hugo, B., Iheanetu, K., Jonas, J., Jozsa, G. I. G., Lehmensiek, R., Makhathini, S., Santos, M. G., Sirothia, S. K., Smirnov, O., Thorat, K.   +14 more
core   +4 more sources

Intracluster Medium through three years of WMAP [PDF]

, 2006
Wilkinson Microwave Anisotropy Probe (WMAP) has provided us with the yet highest resolution all-sky maps of the Cosmic Microwave Background. As a result of thermal Sunyaev-Zel'dovich effect, clusters of galaxies are imprinted as tiny, poorly resolved ...
Afshordi, Afshordi, Afshordi, Bennett, Benson, Carlstrom, Ettori, Fosalba, Fosalba, Hernández-Monteagudo, Hernández-Monteagudo, Kravtsov, Kravtsov, Lieu, Lin, Myers, Nagai, Navarro, Niayesh Afshordi, Schmidt, Sunyaev, Vikhlinin, Zwicky   +22 more
core   +3 more sources

Commensal observing with the Allen Telescope array: software command and control

, 2010
The Allen Telescope Array (ATA) is a Large-Number-Small-Diameter radio telescope array currently with 42 individual antennas and 5 independent back-end science systems (2 imaging FX correlators and 3 time domain beam formers) located at the Hat Creek ...
Ackermann, Robert, Barott, William C., Gutierrez-Kraybill, Colby, Harp, Gerald, Keating, Garrett K., Kilsdonk, Tom, MacMahon, David, Richards, Jon, Williams, Peter K. G.   +8 more
core   +1 more source

Where is the best site on Earth? Domes A, B, C and F, and Ridges A and B [PDF]

, 2009
The Antarctic plateau contains the best sites on earth for many forms of astronomy, but none of the existing bases was selected with astronomy as the primary motivation.
Ashley, Michael C. B., Kato, Seiji, Kulesa, Craig, Lawrence, Jon S., Liu, Guiping, Minnis, Patrick, Saunders, Will, Storey, John W. V., Winker, David M.   +8 more
core   +1 more source

Probing Exotic Physics With Cosmic Neutrinos

, 2005
Traditionally, collider experiments have been the primary tool used in searching for particle physics beyond the Standard Model. In this talk, I will discuss alternative approaches for exploring exotic physics scenarios using high energy and ultra-high ...
A. Ringwald, D. Hooper, Dan Hooper, J. N. Bahcall, L. A. Anchordoqui, L. Anchordoqui, N. Hayashida, P. D. D’Eath, R. C. Myers, T. Han   +9 more
core   +1 more source

Towards a Resource-Centric Data Network for Astronomy

, 2010
Over the past decade, astronomers have been using an increasingly larger number of web-based applications and archives to conduct their research. However, despite the early success in creating links across projects and data centers, the promise of a ...
Accomazzi, Alberto, Kurtz, Michael J., Murray, Stephen S.   +2 more
core   +1 more source

HST/NICMOS observations of a proto-brown dwarf candidate [PDF]

, 2005
We present deep HST/NICMOS observations peering through the outflow cavity of the protostellar candidate IRAS 04381+2540 in the Taurus Molecular Cloud-1.
Balázs, Baraffe, Baraffe, Bate, Brown, Bryden, Burrows, Chandler, Chandler, D'Angelo, D. Apai, D. Lemke, Duchêne, Haisch, Hogerheijde, Jayawardhana, Klein, L. V. Tóth, Mathis, Motte, Padgett, Padoan, Pascucci, R. Vavrek, Rebolo, Reipurth, Reipurth, Saito, Sterzik, Sterzik, T. Henning, Wainscoat, White, Whittet, Whitworth, Young, Z. Kovács   +36 more
core   +1 more source

Radial Velocities as an Exoplanet Discovery Method

, 2017
The precise radial velocity technique is a cornerstone of exoplanetary astronomy. Astronomers measure Doppler shifts in the star's spectral features, which track the line-of/sight gravitational accelerations of a star caused by the planets orbiting it ...
B Campbell, C Chubak, D Queloz, D Queloz, DA Fischer, DW Latham, FA Pepe, GW Marcy, H Kjeldsen, I Boisse, JF Kasting, JL Bean, JT Wright, M Mayor, RP Butler, RP Butler, WJ Borucki, X Dumusque   +17 more
core   +1 more source

A template method for measuring the iron spectrum in cosmic rays with Cherenkov telescopes

, 2014
Understanding the sources, acceleration mechanisms, and propagation of cosmic rays is an active area of research in astro-particle physics. Measuring the spectrum and elemental composition of cosmic rays on earth can help solve this question.
Fleischhack, Henrike
core   +2 more sources

Studying the spectral properties of Active Galactic Nuclei in the JWST era [PDF]

, 2009
The James Webb Space Telescope (JWST), due to launch in 2014, shall provide an unprecedented wealth of information in the near and mid-infrared wavelengths, thanks to its high-sensitivity instruments and its 6.5 m primary mirror, the largest ever ...
Alonso-Herrero, A., Baes, M., Labiano, A., Nakos, Th.   +3 more
core   +3 more sources