English
Related papers

Related papers: The ALMA Band 9 receiver - Design, construction, c…

200 papers

This article reports on the first step in a focused program to re-optimize radio astronomy receiver architecture to better take advantage of the latest advancements in commercial digital technology. Specifically, an L-Band…

Instrumentation and Methods for Astrophysics · Physics 2015-05-18 Matthew A. Morgan , J. Richard Fisher

We present interferometric observations at 1 and 3\,mm with the Atacama Large Millimeter Array (ALMA) of the free-free continuum and mm-wavelength recombination line (mRRL) emission of the ionized core (within $\lsim$130\,au) of the young…

Astrophysics of Galaxies · Physics 2024-12-11 C. Sánchez Contreras , D. Tafoya , J. P. Fonfria , J. Alcolea , A. Castro-Carrizo , V. Bujarrabal

This paper describes a new Heterodyne Array Receiver Programme (HARP) and Auto-Correlation Spectral Imaging System (ACSIS) that have recently been installed and commissioned on the James Clerk Maxwell Telescope (JCMT). The 16-element…

The Atacama Cosmology Telescope is a project to map the microwave background radiation at arcminute angular resolution and high sensitivity in three frequency bands over substantial sky areas. Cosmological signals driving such an experiment…

Astrophysics · Physics 2019-08-14 Arthur Kosowsky

The Submillimeter Array (SMA) was conceived at the Smithsonian Astrophysical Observatory in 1984 as a six element interferometer to operate in the major atmospheric windows from about 200 to 900 GHz. In 1996, the Academica Sinica Institute…

Astrophysics · Physics 2007-05-23 R. Blundell

Radio reception relies on antennas for the collection of electromagnetic fields carrying information, and receiver elements for demodulation and retrieval of the transmitted information. Here we demonstrate an atom-based receiver for AM and…

Atomic Physics · Physics 2021-08-12 David A. Anderson , Rachel E. Sapiro , Georg Raithel

We report on the development of W-band (75-110 GHz) heterodyne receiver technology for large-format astronomical arrays. The receiver system is designed to be both mass-producible, so that the designs could be scaled to thousands of…

We present the first radio polarimetric observations of a fast-rising blue optical transient, AT2018cow. Two epochs of polarimetry with additional coincident photometry were performed with the Atacama Large Millimeter/submillimeter Array…

High Energy Astrophysical Phenomena · Physics 2019-06-19 K. Y. Huang , J. Shimoda , Y. Urata , K. Toma , K. Yamaoka , K. Asada , H. Nagai , S. Takahashi , G. Petitpas , M. Tashiro

In order to investigate the far-infrared excess detected from the west hot spot of the radio galaxy Pictor A with the Herschel observatory, a submillimeter photometry is performed with the Atacama Compact Array (ACA) of the Atacama Large…

High Energy Astrophysical Phenomena · Physics 2023-08-09 Naoki Isobe , Hiroshi Nagai , Motoki Kino , Shunsuke Baba , Takao Nakagawa , Yuji Sunada , Makoto Tashiro

Science Verification (SV) data of solar observations with Atacama Large Millimeter-submillimeter Array (ALMA) telescope were released to the scientific community. Understanding the centre to limb brightness function is necessary to compare…

Solar and Stellar Astrophysics · Physics 2019-09-20 Davor Sudar , Roman Brajša , Ivica Skokić , Arnold O. Benz

[Abridged] Aims: This work focuses on one lensed system, HATLAS J142935.3-002836 (H1429-0028), selected in the Herschel-ATLAS field. Gathering a rich, multi-wavelength dataset, we aim to confirm the lensing hypothesis and model the…

Here we describe the Compact Array Broadband Backend (CABB) and present first results obtained with the upgraded Australia Telescope Compact Array (ATCA). The 16-fold increase in observing bandwidth, from 2 x 128 MHz to 2 x 2048 MHz, high…

We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of a quiet-Sun region at a wavelength of 3 mm, obtained during the first solar ALMA cycle on April 27, 2017, and compare them with available chromospheric…

Solar and Stellar Astrophysics · Physics 2019-06-05 Maria A. Loukitcheva , Stephen M. White , Sami K. Solanki

We conducted the observational tests of a phase correction scheme for the Atacama Compact Array (ACA) of the Atacama Large Millimeter and submillimeter Array (ALMA) using the Submillimeter Array (SMA). Interferometers at millimeter- and…

Instrumentation and Methods for Astrophysics · Physics 2015-05-19 Satoki Matsushita , Yu-Lin Chen

We present first results of a new heterodyne spectrometer dedicated to high-resolution spectroscopy of molecules of astrophysical importance. The spectrometer, based on a roomtemperature heterodyne receiver, is sensitive to frequencies…

Instrumentation and Methods for Astrophysics · Physics 2018-09-12 Nadine Wehres , Bettina Heyne , Frank Lewen , Marius Hermanns , Bernhard Schmidt , Christian Endres , Urs U. Graf , Daniel R. Higgins , Stephan Schlemmer

In the context of the Galactic Emission Mapping collaboration, a galactic survey at 5GHz is in preparation to properly characterize the galactic foreground to the Cosmic Microwave Background Radiation (CMBR). For the North sky survey, a new…

We discuss the science drivers for ALMA Band 2 which spans the frequency range from 67 to 90 GHz. The key science in this frequency range are the study of the deuterated molecules in cold, dense, quiescent gas and the study of redshifted…

In this short review we will highlight some of the recent advancements in the field of high-resolution laboratory spectroscopy that meet the needs dictated by the advent of highly sensitive and broadband telescopes like ALMA and SOFIA.…

Instrumentation and Methods for Astrophysics · Physics 2016-05-25 Sandra Brünken , Stephan Schlemmer

Here we briefly present some design approaches for a multifrequency 96-antenna radioheliograph. The array antenna configuration, transmission lines and digital receivers are the main focus of this work. The radioheliograph is a T-shaped…

Instrumentation and Methods for Astrophysics · Physics 2015-06-19 S. V. Lesovoi , A. T. Altyntsev , E. F. Ivanov , A. V. Gubin

Integrated optics are used to achieve astronomical interferometry inside robust and compact materials, improving the instrument's stability and sensitivity. In order to perform differential phase measurements at the H$\alpha$ line (656.3…