Zobrazeno 1 - 10
of 242
pro vyhledávání: '"Bertello, L."'
Autor:
Criscuoli, S., Bertello, L., Choudhary, D. P., DeLand, M., Kopp, G., Kowalski, A., Marchenko, S., Reardon, K., Pevtsov, A. A., Tilipman, D.
Long-term high-cadence measurements of stellar spectral variability are fundamental to better understand stellar atmospheric properties and stellar magnetism. These, in turn, are fundamental for the detectability of exoplanets as well as the characte
Externí odkaz:
http://arxiv.org/abs/2305.07676
Autor:
Pevtsov, Alexei A., Martinez-Pillet, V., Gilbert, H., de Wijn, A. G., Roth, M., Gosain, S., Upton, L. A., Katsukawa, Y., Burkepile, J., Zhang, Jie, Reardon, K. P., Bertello, L., Jain, K., Tripathy, S. C., Leka, K. D.
Long-term synoptic observations of the Sun are critical for advancing our understanding of Sun as an astrophysical object, understanding the solar irradiance and its role in solar-terrestrial climate, for developing predictive capabilities of solar e
Externí odkaz:
http://arxiv.org/abs/2211.06712
The total solar irradiance (TSI) varies on timescales of minute to centuries. On short timescales it varies due to the superposition of intensity fluctuations produced by turbulent convection and acoustic oscillations. On longer scale times, it chang
Externí odkaz:
http://arxiv.org/abs/2209.10115
Autor:
Bertello, L., Arge, N., De Wijn, A. G., Gosain, S., Henney, C., Leka, K. D., Linker, J., Liu, Y., Luhmann, J., Macniece, P. J., Petrie, G., Pevtsov, A., Pevtsov, A. A.
This white paper advocates the importance of multi-height measurements of the vector magnetic field in the solar atmosphere. As briefly described in this document, these measurements are critical for addressing some of the most fundamental questions
Externí odkaz:
http://arxiv.org/abs/2209.04453
Publikováno v:
A&A 608, A87 (2017)
We study the variability of solar activity using new photospheric proxies originally developed for the analysis of stellar magnetism with the CoRoT and Kepler photometric observations. These proxies are obtained by tracking the temporal modulations i
Externí odkaz:
http://arxiv.org/abs/1709.05110
Autor:
Javaraiah, J., Bertello, L.
We have detected several periodicities in the solar equatorial rotation rate of sunspot groups in the Greenwich Photoheliographic Results (GPR) during the period 1931-1976, the Solar Optical Observing Network (SOON) during the period 1977-2014, and t
Externí odkaz:
http://arxiv.org/abs/1610.06710
Magnetic flux synoptic charts are critical for reliable modeling of the corona and heliosphere. Until now, however, these charts were provided without any estimate of uncertainties. The uncertainties are due to instrumental noise in the measurements
Externí odkaz:
http://arxiv.org/abs/1312.0509
Autor:
Sturrock, P. A., Bertello, L., Fischbach, E., Javorsek II, D., Jenkins, J. H., Kosovichev, A., Parkhomov, A. G.
This article presents a comparative analysis of solar activity data, Mt Wilson diameter data, Super-Kamiokande solar neutrino data, and nuclear decay data acquired at the Lomonosov Moscow State University (LMSU). We propose that salient periodicities
Externí odkaz:
http://arxiv.org/abs/1211.6352
We compare photospheric line-of-sight magnetograms from the Synoptic Long-term Investigations of the Sun (SOLIS) vector spectromagnetograph (VSM) instrument with observations from the 150-foot Solar Tower at Mt. Wilson (MWO), Helioseismic and Magneti
Externí odkaz:
http://arxiv.org/abs/1209.6390
We present results using the AutoClass analysis application available at NASA/Ames Intelligent Systems Div. (2002) which is a Bayesian, finite mixture model classification system developed by Cheeseman and Stutz (1996). We apply this system to Mount
Externí odkaz:
http://arxiv.org/abs/0909.2392