Results 41 to 50 of about 299,299 (345)

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

Infrared Spectroscopy of Symbiotic Stars. IV. V2116 Ophiuchi/GX 1+4, The Neutron Star Symbiotic [PDF]

, 2005
We have computed, based on 17 infrared radial velocities, the first set of orbital elements for the M giant in the symbiotic binary V2116 Ophiuchi. The giant's companion is a neutron star, the bright X-ray source GX 1+4. We find an orbital period of 1161
Bandyopadhyay R., Batten A. H., Charbonnel C., Doty J., Francis C. Fekel, Glass I. S., Gustafsson B., Hut P., Kenneth H. Hinkle, Kholopov P. N., Maeder A., Murset U., Paul B., Peter R. Wood, Phinney E. S., Predehl P., Richard R. Joyce, Ricketts M. J., Scarfe C. D., Schmutz W., Shahbaz T., Smith V. V., Soker N., Thomas Lebzelter, van den Heuvel E. P. J., Verne V. Smith, Zahn J.-P.   +26 more
core   +4 more sources

The Stellar Parameters and Evolutionary State of the Primary in the d'-Symbiotic System StH\alpha190 [PDF]

, 2001
We report on a high-resolution, spectroscopic stellar parameter and abundance analysis of a d' symbiotic star: the yellow component of StH\alpha190. This star has recently been discovered, and confirmed here, to be a rapidly rotating (vsini=100 km/s ...
Claudio B. Pereira, Jeffries R. D., Katia Cunha, Kaufer A., Schaerer D., Schmid H. M., Smith V. V., Verne V. Smith, Webster B. L.   +8 more
core   +2 more sources

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

The influence of general-relativity effects, dynamical tides and collisions on planet-planet scattering close to the star

, 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

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, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +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, Mathew Stanley, Olawale Raimi, Andrew T. Ferenbach, Helge C Dorfmueller, Daan M. F. van Aalten   +5 more
wiley   +1 more source

Presupernova Multiple Giant Eruptions in Massive Stars

The Astrophysical Journal
Massive 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