Associazione Romana Astrofili

157 FRASSO SABINO 42,22945555N 12,81150555E 465m s.l.m.

Herschel far-IR counterparts of SDSS galaxies: analysis of commonly used star formation rate estimates

We study a hundred of galaxies from the spectroscopic Sloan Digital Sky Survey (SDSS) with individual detections in the far-infrared Herschel Photodetector Array Camera and Spectrometer bands (100 or 160 μm) and in the GALEX far-ultraviolet band up to z ˜ 0.4 in the COSMOS and Lockman Hole fields. The galaxies are divided into four spectral and four morphological types. For the star-forming and unclassifiable galaxies, we calculate dust extinctions from the ultraviolet (UV) slope, the Hα/Hβ ratio and the L<SUB>IR</SUB>/L<SUB>UV</SUB> ratio. There is a tight correlation between the...

High Z material operation in FTU

High Z materials, as possible plasma facing components for a fusion reactor, are being re-evaluated due to their advantages connected to the low sputtering yield and small erosion. A data base of experimental results related to their use on present Tokamak is missing. FTU has carried out a series of experiments with different medium and high Z limiter materials, Ni, Mo, and W, to improve the knowledge of the plasma behavior in these conditions. The results on plasma operation, core parameters, impurity content, and corresponding radiation losses are presented, and compared with...

Prossimo appuntamento con "Occhi su Saturno"

La prossima apertura pubblica dell’Osservatorio di Frasso Sabino si terrà il 10 Maggio e ci vedrà partecipare alla manifestazione nazionale “Occhi su Saturno”. Programma della giornata L’ARA intratterrà i visitatori con osservazioni al telescopio del Sole, nel pomeriggio, e del signore degli Anelli, durante l’apertura serale. Ore 17.30 fino alle 18:00 Osservazione del Sole con il nuovo telescopio solare dell’ARA Ore 18.00 sino alle 19.00 conferenza: Saturno, storia delle osservazioni e conoscenze attuali. dalle 19.00 alle 19.30 visita al Telescopio principale dell’Osservatorio. Dalle...

Developing Tools to Search for PNe in the J­PAS Survey

The Javalambre Physics of the Accelerating Universe Astrophysical Survey (J-PAS) is a new astronomical facility dedicated to mapping the observable Universe in 59 colors, and will produce high-quality images and an unique spectral resolution over the 8000 deg^2. It will consist of two telescopes. One of 2.5-m (J-PAS) and another of 0.8-m (J-PLUS, mainly for calibrations). The former will have a dedicated 1.2-G pixel survey camera (containing an array of 14 CCDs) with a FoV of 5 deg^2. It is planned to take 4–5 years and is expected to map the above area to a 5σ magnitude depth for...

Apertura Pubblica di Aprile