Results 41 to 50 of about 300,769 (347)
False Planets around Giant Stars: A Case Study of Sanders 364 in M67
The Astronomical Journal, 2023 Discovering planets in sparsely populated regions of parameter space is crucial to improving our understanding of planetary formation and evolution. One such region is the subset of planets that orbit giant, evolved stars.
Qijia Zhou +7 more
doaj +1 more source
A magnetically driven origin for the low luminosity GRB 170817A associated with GW170817
, 2018 The gamma-ray burst GRB 170817A associated with GW170817 is subluminous and subenergetic compared with other typical short GRBs. It may be due to a relativistic jet viewed off-axis, or a structured jet, or cocoon emission. Giant flares from magnetars may
Huang, L., Tong, H., Yu, C.
core +1 more source
, 2019 Planet--Planet scattering is an efficient and robust dynamical mechanism for producing eccentric exoplanets. Coupled to tidal interactions with the central star, it can also explain close--in giant planets on circularized and potentially misaligned ...
Marzari, F., Nagasawa, M.
core +1 more source
Red Giant Branch Stars: The Theoretical Framework [PDF]
Publications of the Astronomical Society of the Pacific, 2002 Theoretical predictions of Red Giant Branch stars' effective temperatures, colors, luminosities and surface chemical abundances are a necessary tool for the astrophysical interpretation of the visible--near infrared integrated light from unresolved stellar populations, the Color-Magnitude-Diagrams of resolved stellar clusters and galaxies, and ...
Salaris, M., Cassisi, S., Weiss, A.
openaire +3 more sources
THE ORBITAL EVOLUTION OF GAS GIANT PLANETS AROUND GIANT STARS [PDF]
The Astrophysical Journal, 2009 Recent surveys have revealed a lack of close-in planets around evolved stars more massive than 1.2 Msun. Such planets are common around solar-mass stars. We have calculated the orbital evolution of planets around stars with a range of initial masses, and have shown how planetary orbits are affected by the evolution of the stars all the way to the tip ...
Villaver, Eva, Livio, Mario
openaire +2 more sources
In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS
FEBS Letters, EarlyView.We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka +11 more
wiley +1 more source
The accretion of brown dwarfs and planets by giant stars -- I. Asymptotic giant branch stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1999 We study the response of the structure of an asymptotic giant branch (AGB) star to the accretion of a brown dwarf or planet in its interior. In particular, we examine the case in which the brown dwarf spirals-in, and the accreted matter is deposited at the base of the convective envelope and in the thin radiative shell surrounding the hydrogen burning ...
Siess, Lionel, Livio, Mario
openaire +2 more sources
Cell wall target fragment discovery using a low‐cost, minimal fragment library
FEBS Letters, EarlyView.LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan +5 more
wiley +1 more source
Presupernova Multiple Giant Eruptions in Massive Stars
The Astrophysical JournalMassive stars can exhibit giant eruptions with high mass loss shortly before their explosion as a core-collapse supernova. These multiple giant eruptions (MGEs) may have a commutative effect that brings the star to a different state, possibly one that ...
Bhawna Mukhija, Amit Kashi
doaj +1 more source
Cytoplasmic p21 promotes stemness of colon cancer cells via activation of the NFκB pathway
Molecular Oncology, EarlyView.Cytoplasmic p21 promotes colorectal cancer stem cell (CSC) features by destabilizing the NFκB–IκB complex, activating NFκB signaling, and upregulating BCL‐xL and COX2. In contrast to nuclear p21, cytoplasmic p21 enhances spheroid formation and stemness transcription factor CD133.
Arnatchai Maiuthed +10 more
wiley +1 more source