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28 papers · 1 filter
Exploring the Stellar Rotation of Early-type Stars in the LAMOST Medium-resolution Survey. III. Evolution
Weijia Sun, Cristina Chiappini
Stellar rotation significantly shapes the evolution of massive stars, yet the interplay of mass and metallicity remains elusive, limiting our capacity to construct accurate stellar…
Exploring the short-term variability of H and H emissions in a sample of M dwarfs
Vipin Kumar, A. S. Rajpurohit, Mudit K. Srivastava +2
The time scales of variability in active M dwarfs can be related to their various physical parameters. Thus, it is important to understand such variability to decipher the physics…
Ultracool dwarfs candidates based on six years of the Dark Energy Survey data
M. dal Ponte, B. Santiago, A. Carnero Rosell +57
We present a sample of 19,583 ultracool dwarf candidates brighter than z selected from the Dark Energy Survey DR2 coadd data matched to VHS DR6, VIKING DR5 and AllWISE co…
Occultation Portal: a web-based platform for data collection and analysis of stellar occultations
Y. Kilic, F. Braga-Ribas, M. Kaplan +9
Recording a stellar occultation is one powerful method that gives direct information about the physical properties of the occulting solar system object. In order to obtain reliable…
Increasing the census of L and T dwarfs in wide binary and multiple systems using Dark Energy Survey DR1 and Gaia DR2 data
M. dal Ponte, B. Santiago, A. Carnero Rosell +57
We present the discovery of 255 binary and six multiple system candidates with wide > 5" separation composed by ultracool dwarfs companions to stars, plus nine double ultracool dwa…
Identification of RR Lyrae stars in multiband, sparsely-sampled data from the Dark Energy Survey using template fitting and Random Forest classification
K. M. Stringer, J. P. Long, L. M. Macri +75
Many studies have shown that RR Lyrae variable stars (RRL) are powerful stellar tracers of Galactic halo structure and satellite galaxies. The Dark Energy Survey (DES), with its de…