Yazar "Işık, Emre" için listeleme
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Amplification of brightness variability by active-region nesting in Solar-like stars
Işık, Emre; Shapiro, Alexander I.; Solanki, Sami K.; Krivova, Natalie A. (Iop Publishing Ltd, 2020)Kepler observations revealed that hundreds of stars with near-solar fundamental parameters and rotation periods have much stronger and more regular brightness variations than the Sun. Here we identify one possible reason ... -
Connecting measurements of solar and stellar brightness variations
Nemec, Nina; Işık, Emre; Shapiro, A. I.; Solanki, Sami K.; Krivova, N. A.; Unruh, Y. (Edp Sciences S A, 2020)Context. A comparison of solar and stellar brightness variations is hampered by the difference in spectral passbands that are used in observations, and also by the possible difference in the inclination of the solar and ... -
Faculae cancel out on the surfaces of active suns
Nemec, N. E.; Shapiro, A. I.; Işık, Emre; Sowmya, K.; Solanki, S. K.; Krivova, N. A.; Cameron, R. H.; Gizon, L. (IOP Publishing, 2022)Surfaces of the Sun and other cool stars are filled with magnetic fields, which are either seen as dark compact spots or more diffuse bright structures like faculae. Both hamper detection and characterization of exoplanets, ... -
Predictions of astrometric jitter for sun-like stars. II. dependence on ınclination, metallicity, and active-region nesting
Krishnamurthy, Sowmya; Nemec, Nina Elisabeth; Shapiro, Alexander; Işık, Emre; Witzke, Veronika; Mints, Alexey; Krivova, Natalie; Solanki, Sami (IOP Publishing, 2021)Ultra-precise astrometry from the Gaia mission is expected to lead to astrometric detections of more than 20,000 exoplanets in our Galaxy. One of the factors that could hamper such detections is the astrometric jitter ... -
Predictions of astrometric jitter for sunlike stars. III. Fast Rotators
Sowmya, K.; Nemec, N. E.; Shapiro, A., I.; Işık, Emre; Krivova, N. A.; Solanki, S. K. (IOP Publishing, 2022)A breakthrough in exoplanet detections is foreseen with the unprecedented astrometric measurement capabilities offered by instrumentation aboard the Gaia space observatory. Besides, astrometric discoveries of exoplanets ... -
Where have all the solar-like stars gone? Rotation period detectability at various inclinations and metallicities
Reinhold, Timo; Shapiro, Alexander I.; Witzke, Veronika; Nèmec, Nina E.; Işık, Emre; Solanki, Sami K. (IOP Publishing, 2021)The plethora of photometric data collected by the Kepler space telescope has pro moted the detection of tens of thousands of stellar rotation periods. However, these periods are not found to an equal extent among different ...
