Associazione Romana Astrofili

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

Acetylcholineestarase-Inhibiting Alkaloids from Lycoris radiata Delay Paralysis of Amyloid Beta-Expressing Transgenic C. elegans CL4176

Getting to Know the Cataclysmic Variable Beneath the Nova Eruption

The eruption of a (classical) nova is widely accepted to be a recurrent event in the lifetime of a cataclysmic binary star. In-between eruptions the system should therefore behave as a ``normal’’ cataclysmic variable (CV), i.e. according to its characteristic properties like the mass-transfer rate or the strength of the magnetic field of the white dwarf. How important are these characteristics for the nova eruption itself, i.e. which type of systems preferably undergo a nova eruption? This question could in principle be addressed by comparing the post-nova systems with the general...

Far-infrared-detected Lyman-break galaxies at z ~ 3. Dust attenuation and dust correction factors at high redshift

Lyman-break galaxies (LBGs) represent one of the kinds of star-forming galaxies that are found in the high-redshift universe. The detection of LBGs in the far-infrared (FIR) domain can provide very important clues on their dust attenuation and total star-formation rate (SFR), allowing a more detailed study than has been performed so far. In this work we explore the FIR emission of a sample of 16 LBGs at z ~ 3 in the GOODS-North and GOODS-South fields that are individually detected in PACS-100 μm or PACS-160 μm. These detections demonstrate the possibility of measuring the dust...

Lyman break and UV-selected galaxies at z ~ 1: II. PACS-100um/160um FIR detections

We report the PACS-100um/160um detections of a sample of 42 GALEX-selected and FIR-detected Lyman break galaxies (LBGs) at z ~ 1 located in the COSMOS field and analyze their ultra-violet (UV) to far-infrared (FIR) properties. The detection of these LBGs in the FIR indicates that they have a dust content high enough so that its emission can be directly detected. According to a spectral energy distribution (SED) fitting with stellar population templates to their UV-to-near-IR observed photometry, PACS-detected LBGs tend to be bigger, more massive, dustier, redder in the UV continuum,...

OTELO Survey: Optimal Emission-Line Flux and Metallicity Estimation with OSIRIS/GTC