Points: 104 | Comments: 76 | Author: sasvari
We present a spectral study of the single magnetically active K giant OP And in the period 1979 -- 2018, monitoring the variability of the activity indicator line H$α$. Original data obtained in the period 2015 -- 2018 with the echelle spectrograph...
Points: 3 | Comments: 0 | Author: Baustin213
Most stars end their main-sequence (MS) lives by evolving through the red-giant and asymptotic-giant branches before ending as a quiescent, stable white dwarf. Therefore, it is imperative to model the post-MS as it relates to long-term stability of e...
We present the results of hydrodynamic simulations of the interaction between a 10 Jupiter mass planet and a red or asymptotic giant branch stars, both with a zero-age main sequence mass of 3.5 $M_\odot$. Dynamic in-spiral timescales are of the order...
We use three-dimensional hydrodynamical simulations to study the rapid infall phase of the common envelope interaction of a red giant branch star of mass equal to 0.88 \msun and a companion star of mass ranging from 0.9 down to 0.1 \msun. We first co...
Giant Low Surface Brightness Galaxies (GLSBGs) are fundamentally distinct from normal galaxies (LSBGs) in star formation and evolution. In this work, we collected 27 local GLSBGs. They have high stellar masses (M*>10^10 Msolar) and low SFRs. With the...
We examine the gas circulation near a gap opened by a giant planet in a protoplanetary disk. We show with high resolution 3D simulations that the gas flows into the gap at high altitude over the mid-plane, at a rate dependent on viscosity. We explain...
The origin of heavy elements synthesized through the rapid neutron capture process ($r$-process) has been an enduring mystery for over half a century. Cehula et al. (2024) recently showed that magnetar giant flares, among the brightest transients eve...
Points: 77 | Comments: 21 | Author: moses1400
Points: 155 | Comments: 32 | Author: blacktulip
Giant clumps are a characteristic feature of observed high-redshift disk galaxies. We propose that these kpc-sized clumps have a complex substructure and are the result of many smaller clumps self-organizing themselves into clump clusters (CC). This...
While there have been far fewer missions to the outer Solar System than to the inner Solar System, spacecraft destined for the giant planets have conducted a wide range of fundamental investigations, returning data that continues to reshape our under...
Vols are a sleeping 2026 football giant - Why is no one talking about this? We went out and hired arguably best defensive coordinator in all of football AND the be
Points: 200 | Comments: 67 | Author: longwave
Gentle Giant were a British progressive rock band active between 1970 and 1980. They were known for the complexity and sophistication of their music and
Points: 17 | Comments: 4 | Author: my12parsecs
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Points: 353 | Comments: 115 | Author: gscott
The poorly-studied, faint (18<m_pg<19.5) variable star CC Bootis has been noted in the literature as a candidate for a halo red giant. It proves instead to be a quasi-stellar object of redshift z=0.172, and is detected as an X-ray source by ROSAT....