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33 papers · 2 filters
Height dependence of the penumbral fine-scale structure in the inner solar atmosphere
Mariarita Murabito, I. Ermolli, F. Giorgi +6
We studied the physical parameters of the penumbra in a large and fully-developed sunspot, one of the largest over the last two solar cycles, by using full-Stokes measurements take…
New Near-Infrared light-curve templates for RR Lyrae variables
V. F. Braga, P. B. Stetson, G. Bono +34
We provide homogeneous optical (UBVRI) and near-infrared (JHK) time series photometry for 254 cluster (omega Cen, M4) and field RR Lyrae (RRL) variables. We ended up with more than…
Supernova dust yields: the role of metallicity, rotation, and fallback
S. Marassi, R. Schneider, M. Limongi +3
Supernovae (SNe) are considered to have a major role in dust enrichment of high redshift galaxies and, due to the short lifetimes of interstellar grains, in dust replenishment of l…
On a new method to estimate distance, reddening and metallicity of RR Lyrae stars using optical/near-infrared (,,,,,) mean magnitudes: Centauri as a first test case
G. Bono, G. Iannicola, V. F. Braga +26
We developed a new approach to provide accurate estimates of metal content, reddening and true distance modulus of RR Lyrae stars (RRLs). The method is based on homogeneous optical…
Extended main sequence turnoff as a common feature of Milky Way open clusters
G. Cordoni, A. P. Milone, A. F. Marino +5
We present photometric analysis of twelve Galactic open clusters and show that the same multiple-population phenomenon observed in Magellanic Clouds (MCs) is present in nearby open…
Propagating Spectropolarimetric Disturbances in a Large Sunspot
M. Stangalini, S. Jafarzadeh, I. Ermolli +7
We present results derived from the analysis of spectropolarimetric measurements of active region AR12546, which represents one of the largest sunspots to have emerged onto the sol…