ﻻ يوجد ملخص باللغة العربية
We present multi-frequency maps of a portion of the Galactic Plane centered on a declination of -60 degrees with resolutions ranging from 0.2 to 0.9 degrees. The maps are optimized to detect unresolved source emission and are cross-calibrated against the planet Jupiter. We discuss six millimeter-bright regions, three of which are visible in all bands, and list measured flux densities. Variability is limited to less than 3.8% for all sources seen at 31 and 42 GHz and less than 10% at 144 GHz. Fractional polarization limits smaller than 0.08 are measured for all sources seen at 31 and 42 GHz. No fractional polarization limits are reported at 144 GHz.
Studies of the diffuse Galactic radio emission are interesting both for better understanding the physical conditions in our Galaxy and for minimising the contamination in cosmological measurements. Motivated by this we present Cosmic Background Image
We conducted a search for technosignatures in April of 2018 and 2019 with the L-band receiver (1.15-1.73 GHz) of the 100 m diameter Green Bank Telescope. These observations focused on regions surrounding 31 Sun-like stars near the plane of the Galaxy
The $rho$ Oph molecular cloud is one of the best examples of spinning dust emission, first detected by the Cosmic Background Imager (CBI). Here we present 4.5 arcmin observations with CBI 2 that confirm 31 GHz emission from $rho$ Oph W, the PDR expos
PSR J1357$-$6429 is a young and energetic radio pulsar detected in X-rays and $gamma$-rays. It powers a compact pulsar wind nebula with a jet visible in X-rays and a large scale plerion detected in X-ray and TeV ranges. Previous multiwavelength studi
The planets Uranus and Neptune with small apparent diameters are primary calibration standards. We investigate their variability at ~90 GHz using archived data taken at the IRAM 30m telescope during the 20 years period 1985 to 2005. We calibrate the