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X-ray activity cycle on the active ultra-fast rotator AB Dor A? Implication of correlated coronal and photometric variability
S. Lalitha, J. H. M. M. Schmitt
Although chromospheric activity cycles have been studied in a larger number of late-type stars for quite some time, very little is known about coronal activity-cycles in other star…
Evidence of Multiple Slow Acoustic Oscillations in the Stellar Flaring Loops of Proxima Centauri
A. K. Srivastava, S. Lalitha, J. C. Pandey
We present the first observational evidence of multiple slow acoustic oscillations in the post flaring loops of the corona of Proxima Centauri using XMM-Newton observations. We fin…
A multi-wavelength view of AB Dor's outer atmosphere - Simultaneous X-ray and optical spectroscopy at high cadence
S. Lalitha, B. Fuhrmeister, U. Wolter +3
We study the chromosphere and corona of the ultra-fast rotator AB Dor A at high temporal and spectral resolution using simultaneous observations with XMM-Newton in the X-rays, VLT/…
MHD Seismology as a Tool to Diagnose the Coronae of X-ray Active Sun-like Flaring Stars
A. K. Srivastava, S. Lalitha
It is now well accepted that the detection of impulsively generated multiple MHD modes are potentially used in diagnosing the local plasma conditions of the solar corona. Analogous…