Results 11 to 20 of about 179,348 (181)

A Low-Insertion Loss Cryogenic Edge-Mode Isolator With 18 GHz Bandwidth

open access: yesIEEE Journal of Microwaves, 2023
Cryogenic isolators play an important role in low-noise receiver systems widely employed in millimeter and submillimeter telescopes. To enable a significantly wider Intermediate Frequency (IF) bandwidth, there is strong demand for a wideband, low-loss ...
Lingzhen Zeng   +2 more
doaj   +1 more source

2 mm Observations and the Search for High-redshift Dusty Star-forming Galaxies

open access: yesThe Astrophysical Journal, 2023
Finding high-redshift ( z ≫ 4) dusty star-forming galaxies is extremely challenging. It has recently been suggested that millimeter selections may be the best approach since the negative K-correction makes galaxies at a given far-infrared luminosity ...
L. L. Cowie, A. J. Barger, F. E. Bauer
doaj   +1 more source

Measurements and Evaluations of the Atmospheric Transparency at Short Millimeter Wavelengths at Candidate Sites for Millimeter- and Sub-Millimeter-Wave Telescopes

open access: yesApplied Sciences, 2023
Radio astronomical observations at millimeter and submillimeter wavelengths are a very important tool for astrophysical research. However, there is a huge area in northeastern Eurasia, including the whole Russian territory, which lacks sufficiently large
Igor I. Zinchenko   +4 more
doaj   +1 more source

The PhotoDissociation Region Toolbox: Software and Models for Astrophysical Analysis

open access: yesThe Astronomical Journal, 2022
The PhotoDissociation Region Toolbox provides comprehensive, easy-to-use, public software tools and models that enable an understanding of the interaction of the light of young, luminous, massive stars with the gas and dust in the Milky Way and in other ...
Marc W. Pound, Mark G. Wolfire
doaj   +1 more source

SCUBA-2 High Redshift Bright Quasar Survey. II. The Environment of z ∼ 6 Quasars at Submillimeter Band

open access: yesThe Astrophysical Journal, 2023
The formation of the first supermassive black holes is expected to have occurred in some most pronounced matter and galaxy overdensities in the early universe.
Qiong Li   +16 more
doaj   +1 more source

Lack of Correlations between Cold Molecular Gas and AGN Properties in Type 1 AGNs at z ≲ 0.5

open access: yesThe Astrophysical Journal, 2023
We present new NOrthern Extended Millimeter Array (NOEMA) observations of the CO(2–1) emission in eight of the brightest Palomar-Green quasars at z ≲ 0.5 to investigate the role of active galactic nucleus (AGN) feedback in luminous quasars detected at ...
Juan Molina   +5 more
doaj   +1 more source

Superconducting Microwave Resonator Arrays for Submillimeter/Far-infrared Imaging [PDF]

open access: yes, 2012
Superconducting microwave resonators have the potential to revolutionize submillimeter and far-infrared astronomy, and with it our understanding of the universe.
Noroozian, Omid
core   +1 more source

Submillimeter Astronomy [PDF]

open access: yes, 2009
For submillimeter astronomy, particularly at 200m, the ARENA working group has proposed a 25 m telescope at the For submillimeter astronomy, particularly at 200µm, the ARENA working group has proposed a 25 m telescope at the Concordia station on Dome C ...
S.J.E. Radford
core   +1 more source

Millimeter/submillimeter fourier transform spectroscopy of Jovian planet atmospheres [PDF]

open access: yes, 1996
A new Fourier transform spectrometer, built for use at the Caltech Submillimeter Observatory, has been used to observe all four of the jovian planets (Jupiter, Saturn, Uranus, and Neptune) in the millimeter-submillimeter wavelength range (0.3- 3.0 mm).
Weisstein, Eric W.
core   +1 more source

Uranus’s and Neptune’s Stratospheric Water Abundance and Vertical Profile from Herschel-HIFI

open access: yesThe Planetary Science Journal, 2022
Here we present new constraints on Uranus’s and Neptune’s externally sourced stratospheric water abundance using disk-averaged observations of the 557 GHz emission line from Herschel’s Heterodyne Instrument for the Far-Infrared.
N. A. Teanby   +4 more
doaj   +1 more source

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