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Pulse-amplitude-resolved spectroscopy of bright accreting pulsars: indication of two accretion regimes
X-ray binaries – neutron stars – accretion
2011/10/8
Context: In addition to coherent pulsation, many accreting neutron stars exhibit flaring activity and strong aperiodic variability on time scales comparable to or shorter than their pulsation period. ...
The strong magnetic field of the large-amplitude beta Cephei pulsator V1449 Aql
stars: early-type —stars: fundamental parameters – stars: individual: V1449 Aql – stars: magnetic fi eld – stars: oscilla- tions —stars: variables: general
2011/9/28
Only for very few beta Cephei stars has the behaviour of the magnetic field been studied over the rotation cycle. During the past two years we have obtained multi-epoch polarimetric spectra of the bet...
The large amplitude outburst of the young star HBC 722 in NGC 7000/IC 5070, a new FU Orionis candidate
stars pre-main sequence – stars variables T Tauri
2010/11/11
Context. The investigations of the photometric and spectral variability of PMS stars are essential to a better understanding of the early phases of stellar evolution. We are carrying out a photometric...
Amplitude variations of the CoRoT Be star 102719279
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/28
The Be star 102719279 is an interesting target observed with CoRoT during two runs, giving us the possibility to study the stability of the detected frequencies and to search for any correlation with ...
Study of High and Low Amplitude Wave Trains of Cosmic Ray Diurnal Variation during Solar Cycle 23
Cosmic rays diurnal variation high amplitude anisotropic events low amplitude anisotropic events solar cycle olar wind speed
2010/9/15
A detailed study has been conducted on the long-term changes in the diurnal variation of cosmic rays in terms of high and low amplitude wave trains event (HAEs/LAEs) during the period 1996–2008 (solar...