Results 81 to 90 of about 2,275,942 (365)

Comment on "A non-interacting low-mass black hole -- giant star binary system" [PDF]

, 2020
Thompson et al. (Reports, 1 November 2019, p. 637, Science) interpreted the unseen companion of the red giant star 2MASS J05215658+4359220 as most likely a black hole.
Heuvel, Ed P. J. van den, Tauris, Thomas M.   +1 more
core   +3 more sources

Seeing Double with K2: Testing Re-inflation with Two Remarkably Similar Planets around Red Giant Branch Stars [PDF]

, 2017
Despite more than 20 years since the discovery of the first gas giant planet with an anomalously large radius, the mechanism for planet inflation remains unknown.
S. Grunblatt, D. Huber, E. Gaidos, E. Lopez, A. Howard, H. Isaacson, E. Sinukoff, A. Vanderburg, Larissa Nofi, Jie Yu, Thomas S. H. North, W. Chaplin, D. Foreman-Mackey, E. Petigura, M. Ansdell, L. Weiss, B. Fulton, D. Lin   +17 more
semanticscholar   +1 more source

Antimicrobial Titanium–Copper Alloys: The Role of Microstructure in Arc‐Melted Compositions

Advanced Engineering Materials, EarlyView.
Copper‐containing titanium alloys show promise in combating orthopedic implant infections. This study explores the influence of heat treatment on Ti‐11.5Cu and Ti‐33Cu alloys, revealing that larger Ti2Cu precipitates (≈5 μm) enhance antimicrobial efficacy through increased surface contact. Results suggest contact sterilization is the primary mechanism,
Daisy Rabbitt, Paraic O’Kelly, Victor M. Villapún, Luke N. Carter, Alexander J. Knowles, Sophie C. Cox   +5 more
wiley   +1 more source

Amplitudes of solar-like oscillations in red giants: Departures from the quasi-adiabatic approximation

EPJ Web of Conferences, 2013
CoRoT and Kepler measurements reveal us that the amplitudes of solar-like oscillations detected in red giant stars scale from stars to stars in a characteristic way. This observed scaling relation is not yet fully understood but constitutes potentially a
Barban C., Ludwig H.-G., Goupil M.J., Dupret M.-A., Belkacem K., Samadi R., Baudin F., Caffau E.   +7 more
doaj   +1 more source

Can Life develop in the expanded habitable zones around Red Giant Stars?

, 2005
We present some new ideas about the possibility of life developing around sub-giant and red giant stars. Our study concerns the temporal evolution of the habitable zone.
Brack A., Brasier M. D., Bruno Lopez, Clampin M., Dalton J. B., Jean Schneider, Kasting J. F., Kozlowski M., Maeder A., Mallik S. V., Neckel H., Paczynski B., Roten C.-A. H., Sleep N. H., Weidemann J., William C. Danchi, Zubrin R.   +16 more
core   +3 more sources

K2-97b: A (RE-?)INFLATED PLANET ORBITING A RED GIANT STAR [PDF]

, 2016
Strongly irradiated giant planets are observed to have radii larger than thermal evolution models predict. Although these inflated planets have been known for over 15 years, it is unclear whether their inflation is caused by the deposition of energy from
S. Grunblatt, D. Huber, E. Gaidos, E. Lopez, B. Fulton, A. Vanderburg, T. Barclay, J. Fortney, A. Howard, H. Isaacson, A. Mann, E. Petigura, V. S. Aguirre, E. Sinukoff   +13 more
semanticscholar   +1 more source

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

Advanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund, Arthur Schulz, Peter Lunkenheimer, Maryana Kraft, Thomas Bergler, Harald Oberhofer, Dirk Volkmer   +6 more
wiley   +1 more source

Variations in the Na-O anticorrelation in globular clusters: Evidence for a deep mixing episode in red giant branch stars

, 2010
The Na-O anticorrelation seen in almost all globular clusters ever studied using high-resolution spectroscopy is now generally explained by the primordial pollution from the first generation of the intermediate-mass asymptotic giant branch stars to the ...
Baines, Carretta, Carretta, Carretta, Carretta, Cho, Cohen, D'Antona, Decressin, Gratton, Gratton, Ivans, Jae-Woo Lee, Kraft, Kraft, Langer, Lee, Lee, Lee, Sneden, Ventura, Ventura, Ventura   +22 more
core   +1 more source

The usage of Stromgren photometry in studies of Local Group Dwarf Spheroidal Galaxies - Application to Draco: a new catalogue of Draco members and a study of the metallicity distribution function and radial gradients [PDF]

, 2006
In this paper we demonstrate how Stromgren uvby photometry can be efficiently used to: 1. Identify red giant branch stars that are members in a dwarf spheroidal galaxy. 2.
A. Ardeberg, Anthony-Twarog, Aparicio, Armandroff, Ashman, Baade, Bell, Bell, Bellazzini, Bergbusch, Bonanos, Bond, Cardelli, Carney, Carretta, Cioni, Clem, Crawford, Crawford, D. Faria, Dolphin, Fulbright, G. Gilmore, G. M. Wahlgren, Grebel, Grillmair, Grundahl, Gustafsson, Harbeck, Hartwick, Heiter, Hilker, Hodge, I. Lundström, Irwin, Irwin, Kleyna, Koch, Lehnert, Muñoz, Odenkirchen, Olsen, Olsen, Olsen, Olsen, Olszewski, P. Linde, S. Feltzing, Schlegel, Schuster, Schuster, Shapley, Shetrone, Shetrone, Smith, Stetson, Stetson, Stetson, Wilkinson, Zinn, Zinn, Zinn, Zinn   +62 more
core   +2 more sources

A newly discovered stellar type: dusty post-red giant branch stars in the Magellanic Clouds [PDF]

, 2016
Context: We present a newly discovered class of low-luminosity, dusty, evolved objects in the Magellanic Clouds. These objects have dust excesses, stellar parameters, and spectral energy distributions similar to those of dusty post-asymptotic giant ...
D. Kamath, P. R. Wood, H. Winckel, J. Nie   +3 more
semanticscholar   +1 more source