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This paper considers the suitability of a number of emerging and future instruments for the study of radio recombination lines (RRLs) at frequencies below 200 MHz. These lines arise only in low-density regions of the ionized interstellar…

Astrophysics of Galaxies · Physics 2015-05-20 W. M. Peters , T. Joseph W. Lazio , T. E. Clarke , W. C. Erickson , N. E. Kassim

Extragalactic radio sources with projected linear size larger than one Megaparsec 1 Mpc = 3.09e22 m = 3.3e6 light years) are called Giant Radio Galaxies (GRGs) or quasars (GRQs). Over the past few years our search for such objects by visual…

Astrophysics of Galaxies · Physics 2017-11-15 Jonatan Rentería Macario , Heinz Andernach

The KVN+VERA array is a joint VLBI project of seven VLBI stations spread throughout Korea and Japan. Since the first fringe detection in 2008, the early phase observations of the KVN+VERA have been carried out every several months.…

Instrumentation and Methods for Astrophysics · Physics 2013-10-11 S. Sawada-Satoh

We report on laboratory test results of the Compact Water Vapor Radiometer (CWVR) prototype for the NSF's Karl G. Jansky Very Large Array (VLA), a five-channel design centered around the 22 GHz water vapor line. Fluctuations in precipitable…

Instrumentation and Methods for Astrophysics · Physics 2019-08-20 Ajay Gill , Robert J. Selina , Bryan J. Butler

The Large Array Survey Telescope (LAST) is a wide-field visible-light telescope array designed to explore the variable and transient sky with a high cadence. LAST will be composed of 48, 28-cm f/2.2 telescopes (32 already installed)…

The Atacama Large Millimeter/submillimeter Array (ALMA), and the Jansky Very Large Array (JVLA) have recently begun probing the Universe. Both provide the largest collecting area available at locations on a high dry site, endowing them with…

Instrumentation and Methods for Astrophysics · Physics 2015-06-04 Alwyn Wootten

The next generation of radio telescope interferometric arrays requires careful design of the array configuration to optimize the performance of the overall system. We have developed a framework, based on a genetic algorithm, for rapid…

Astrophysics · Physics 2009-11-10 Babak E. Cohanim , Jacqueline N. Hewitt , Olivier de Weck

We constructed and presented in the first paper of this series a new sample of 84 large angular size radio galaxies by selecting from the NRAO VLA Sky Survey objects with angular size > 4', declination above +60 degrees and total flux…

Astrophysics · Physics 2009-11-07 L. Lara , I. Marquez , W. D. Cotton , L. Feretti , G. Giovannini , J. M. Marcaide , T. Venturi

We consider the capabilities for detecting low order CO emission lines from high-z galaxies using the next generation of radio telescopes operating at 22 and 43 GHz. We employ models for the evolution of dusty star forming galaxies based on…

Astrophysics · Physics 2009-11-07 C. L. Carilli , A. W. Blain

Many modern radio telescopes employ an observational strategy that involves maximizing the use of their available spaces (cabins), outfitting them with various receivers at different frequencies to detect incoming signals from the sky…

Instrumentation and Methods for Astrophysics · Physics 2024-10-24 Emiliano Rasztocky , Matias Rolf Hampel , Rodrigo Reeves , Jacques R. D. Lepine , Gustavo Esteban Romero

The Shanghai Astronomical Observatory (SHAO) of the Chinese Academy of Sciences (CAS) is studying a space VLBI (Very Long Baseline Interferometer) program. The ultimate objective of the program is to image the immediate vicinity of the…

Instrumentation and Methods for Astrophysics · Physics 2014-07-01 Xiaoyu Hong , Zhiqiang Shen , Tao An , Qinghui Liu , the Chinese Space VLBI Array team

We report preliminary results of a visual inspection of ~4300 deg$^2$ covered by 4414 images of the 3-GHz VLA Sky Survey (VLASS, epoch 1.1) in search of extended radio structures. Over 7600 positions were registered, and for a subset of 270…

Astrophysics of Galaxies · Physics 2018-08-23 Agueda C. Villarreal Hernández , Heinz Andernach

The Cherenkov Telescope Array (CTA) is the future instrument in ground-based gamma-ray astronomy in the energy range from 20 GeV to 300 TeV. Its sensitivity will surpass that of current generation experiments by a factor $\sim$10,…

Instrumentation and Methods for Astrophysics · Physics 2017-08-09 A. Schulz , M. Garczarczyk , L. Oakes , S. Schlenstedt , U. Schwanke , the CTA Consortium

The proposed VLA Sky Survey (VLASS) comprises two distinct S-band (2--4 GHz) surveys: (1) All-Sky covering the sky north of -40 deg with rms noise 69 microJy/beam = 1.5 K in the 2.5 arcsec beam and (2) Deep covering 10 square deg with rms…

Instrumentation and Methods for Astrophysics · Physics 2015-02-24 Jim Condon

We discuss various aspects of centimeter and millimeter wavelength continuum and line observations of high redshift star forming galaxies. Perhaps the most important lesson is that sensitive observations at submm through cm wavelengths…

Astrophysics · Physics 2009-09-25 C. L. Carilli , K. M. Menten , M. S. Yun , F. Bertoldi , F. Owen , A. Dey

The Giant Radio Array for Neutrino Detection (GRAND) is an envisioned observatory of ultra-high-energy particles of cosmic origin, with energies in excess of 100 PeV. GRAND uses large surface arrays of antennas to look for the radio…

Instrumentation and Methods for Astrophysics · Physics 2025-07-15 Jaime Álvarez-Muñiz , Rafael Alves Batista , Aurélien Benoit-Lévy , Teresa Bister , Martina Bohacova , Mauricio Bustamante , Washington Carvalho , Yiren Chen , LingMei Cheng , Simon Chiche , Jean-Marc Colley , Pablo Correa , Nicoleta Cucu Laurenciu , Zigao Dai , Rogerio M. de Almeida , Beatriz de Errico , João R. T. de Mello Neto , Krijn D. de Vries , Valentin Decoene , Peter B. Denton , Bohao Duan , Kaikai Duan , Ralph Engel , William Erba , Yizhong Fan , Arsène Ferrière , QuanBu Gou , Junhua Gu , Marion Guelfand , Gang Guo , Jianhua Guo , Yiqing Guo , Claire Guépin , Lukas Gülzow , Andreas Haungs , Matej Havelka , Haoning He , Eric Hivon , Hongbo Hu , Guoyuan Huang , Xiaoyuan Huang , Yan Huang , Tim Huege , Wen Jiang , Sei Kato , Ramesh Koirala , Kumiko Kotera , Jelena Köhler , Bruno L. Lago , Zhisen Lai , Jolan Lavoisier , François Legrand , Antonios Leisos , Rui Li , Xingyu Li , Cheng Liu , Ruoyu Liu , Wei Liu , Pengxiong Ma , Oscar Macías , Frédéric Magnard , Alexandre Marcowith , Olivier Martineau-Huynh , Zack Mason , Thomas McKinley , Paul Minodier , Miguel Mostafá , Kohta Murase , Valentin Niess , Stavros Nonis , Shoichi Ogio , Foteini Oikonomou , Hongwei Pan , Konstantinos Papageorgiou , Tanguy Pierog , Lech W. Piotrowski , Simon Prunet , Clément Prévotat , Xiangli Qian , Markus Roth , Takashi Sako , Sarvesh Shinde , Dániel Szálas-Motesiczky , Szymon Sławiński , Kaoru Takahashi , Xishui Tian , Charles Timmermans , Petr Tobiska , Apostolos Tsirigotis , Matías Tueros , George Vittakis , Vincent Voisin , Hanrui Wang , Jiale Wang , Shen Wang , Xiangyu Wang , Xu Wang , Daming Wei , Feng Wei , Emily Weissling , Juan Wu , Xiangping Wu , Xuefeng Wu , Xin Xu , Xing Xu , Fufu Yang , Lili Yang , Xuan Yang , Qiang Yuan , Philippe Zarka , Hodung Zeng , Chao Zhang , Jianli Zhang , Kewen Zhang , Pengfei Zhang , Qingchi Zhang , Songbo Zhang , Yi Zhang , Hao Zhou , Jaime Álvarez-Muñiz , Sergio Cabana-Freire , Washington Carvalho , Alan Cummings , Cosmin Deaconu , Jackson Hinkel , Kaeli Hughes , Ryan Krebs , Youwei Liu , Zachary Martin , Katharine Mulrey , Alisa Nozdrina , Eric Oberla , Steven Prohira , Andrés Romero-Wolf , Abigail G. Vieregg , Stephanie A. Wissel , Enrique Zas , Andrew Zeolla

The Atacama Large Millimeter/submillimeter Array remains the largest mm radio interferometer observatory world-wide. It is now conducting its 11th observing cycle. In our previous paper presented at this conference series in 2020, we…

Instrumentation and Methods for Astrophysics · Physics 2024-08-09 Dirk Petry , María Díaz Trigo , Rüdiger Kneissl , Ignacio Toledo , Atsushi Miyazaki , Toshinobu Takagi , Ashley Barnes , Francesca Bonanomi

It has been widely acknowledged that Very Long Baseline Interferometry (VLBI) in the submillimeter wavelengths can make imaging observations of super massive black holes possible. The Sub-Millimeter Array (SMA) along with the James Clerk…

Instrumentation and Methods for Astrophysics · Physics 2012-10-23 Vinayak Nagpal

We have observed the Extended Chandra Deep Field South (E-CDF-S) using a mosaic of six deep Very Large Array (VLA) pointings at 1.4GHz. In this paper, we present the survey strategy, description of the observations, and the first data…

Very long baseline radio interferometry (VLBI) with ground-based observatories is limited by the size of Earth, the geographic distribution of antennas, and the transparency of the atmosphere. In this whitepaper, we present Capella, a…

Instrumentation and Methods for Astrophysics · Physics 2024-06-28 Sascha Trippe , Taehyun Jung , Jung-Won Lee , Jan Wagner , Jeong-Yeol Han , Wonseok Kang , Jae-Hyun Kyeong , Junghwan Oh , Jae-Young Kim , Jongho Park , Jeffrey A. Hodgson