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SUMMARY:SunDish Project: Single-Dish Solar Imaging and calibration in K-ba
 nd with the INAF Radio Telescopes
DTSTART;VALUE=DATE-TIME:20230508T145500Z
DTEND;VALUE=DATE-TIME:20230508T151000Z
DTSTAMP;VALUE=DATE-TIME:20240704T115652Z
UID:indico-contribution-302@meetings.aip.de
DESCRIPTION:Speakers: Sara Mulas (INAF-OAC)\nThe SunDish project aims to m
 ap and monitor the Sun at high radio frequencies with the Italian Sardinia
  (64-m) and Medicina (32-m) Radio Telescopes in the K-band range (18-26 GH
 z)\, up to 100 GHz in perspective. Since the two instruments were not orig
 inally designed to observe the Sun\, a new solar radio imaging system was 
 implemented. To date we acquired more than 350 solar maps with resolutions
  in the 0.7-2 arcmin range\, filling the observational gap in the field of
  chromospheric imaging at these frequencies to date.\n\nObservations of th
 e brightness temperature of the solar atmosphere in the radio band can map
  plasma processes that produce free-free emission in the local thermodynam
 ic equilibrium and gyromagnetic phenomena\, providing a probe of physical 
 conditions in a wide range of atmospheric layers both for quiet and active
  regions.\n\nAs a first early science result of the project\, we present t
 he first catalog of radio continuum solar imaging observations with Medici
 na 32-m and SRT 64-m radio telescopes including the multi-wavelength ident
 ification of active regions\, their brightness and spectral characterizati
 on. The interpretation of the observed emission as thermal bremsstrahlung 
 components combined with gyro-magnetic variable emission pave the way to t
 he use of our system for long-term monitoring of the Sun. Single-dish radi
 o imaging represents an ideal technique to perform accurately calibrated s
 olar observations. We obtained obtained unprecedented and very precise cal
 ibrated measurements of the Quiet Sun in the K-band affected by a mean rel
 ative error of 3%.\n\nThrough systematic monitoring of the Sun\, our syste
 m can provide accurate measurement of the brightness temperature of the ra
 dio-quiet Sun component\; characterization of the flux density\, spectral 
 properties and long-term evolution of dynamical features (active regions\,
  coronal holes\, loop systems\, streamers\, and the coronal plateau)\; pre
 diction of powerful flares through the detection of peculiar spectral vari
 ations in the active regions\, as a valuable forecasting probe for the Spa
 ce Weather hazard network.\n\nhttps://meetings.aip.de/event/24/contributio
 ns/302/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/24/contributions/302/
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