Results 71 to 80 of about 606 (180)

A Highly Compact 530-610 GHz Bandpass Filter Using Patch Resonators to Develop SSB Spectrometer

open access: yesIEEE Journal of Microwaves
In double sideband (DSB) receiver systems, both the desired signals and unwanted image frequencies are downconverted, necessitating effective filtering to enhance system selectivity and sensitivity.
Berhanu T Bulcha   +3 more
doaj   +1 more source

A Monopolar Jet from Protostar HOPS 10: Evidence for Asymmetric Magnetized Launching

open access: yesThe Astronomical Journal
A fundamental challenge in star formation is understanding how a protostar accretes mass from its circumstellar disk while removing excess angular momentum.
Somnath Dutta
doaj   +1 more source

Far-field Pattern Analysis Based on Piecewise Aperture Field Integration for Leighton Chajnantor Telescope Antenna under Gravity and Wind Load

open access: yesThe Astronomical Journal
The Caltech Submillimeter Observatory telescope will be relocated from Mauna Kea, Hawaii to Chajnantor Plateau, Chile, refurbished there and renamed the Leighton Chajnantor Telescope (LCT).
Jia You, Zheng Wang
doaj   +1 more source

Improved Carbon and Nitrogen Isotopic Ratios for CH3CN in Titan’s Atmosphere Using ALMA

open access: yesThe Planetary Science Journal
Titan, Saturn’s largest satellite, maintains an atmosphere composed primarily of nitrogen (N _2 ) and methane (CH _4 ) that leads to complex organic chemistry.
Jonathon Nosowitz   +8 more
doaj   +1 more source

Molecular Jets from an Evolved Protostar: Insights from JWST-ALMA Synergy

open access: yesThe Astrophysical Journal
The combination of the Atacama Large Millimeter/submillimeter Array (ALMA) and JWST/MIRI mid-infrared observations offers a transformative view of protostellar jets and outflows by probing cold and warm gas components across diverse physical conditions ...
Somnath Dutta
doaj   +1 more source

Rapid-response 1.3 mm Observations of GRB 260127A with the Submillimeter Array

open access: yesThe Astrophysical Journal Letters
We present the results from rapid-response 1.3 mm observations of GRB 260127A using the Submillimeter Array (SMA). SMA arrived on-source 12.6 minutes after the initial detection by the Neil Gehrels Swift Observatory, representing the earliest millimeter ...
Garrett K. Keating   +11 more
doaj   +1 more source

Modeling Long-wavelength Amorphous Dust Emission Based on the Physically Motivated Soft-potential Model

open access: yesThe Astrophysical Journal
We propose a new amorphous dust emission model based on the soft-potential (SP) model, applicable in the long-wavelength range from the far-infrared to the microwave.
Masashi Nashimoto
doaj   +1 more source

The ALMA-ATOMS Survey: Exploring Protostellar Outflows in HC3N

open access: yesThe Astrophysical Journal
We present the first systematic study of bipolar outflows using HC _3 N as a tracer in a sample of 146 massive star-forming regions from the Atacama Large Millimeter/submillimeter Array Three-millimeter Observations of Massive Star-forming Regions (ATOMS)
Ariful Hoque   +27 more
doaj   +1 more source

InSb Heterodyne Receivers For Submillimeter Astronomy

open access: yes, 1981
© 1981 Society of Photo-Optical Instrumentation Engineers (SPIE). This work is supported by NASA grant # NAG 2-1 as part of the Kuiper Airborne Observatory program, and by NASA grant # NAGW-107 for receiver development.
openaire   +2 more sources

Nondetection of HC(S)SH: Estimating Upper Limits and Constraining Chemistry

open access: yesThe Astrophysical Journal
The search for dithioformic acid (t–HC(S)SH) in star-forming regions is crucial for understanding interstellar sulfur chemistry and addressing the “missing sulfur” problem.
Dipen Sahu   +6 more
doaj   +1 more source

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