Results 81 to 90 of about 6,328,275 (332)

Speckle Interferometry at SOAR Telescope in 2023

The Astronomical Journal
Results of the speckle-interferometry observations at the 4.1 m Southern Astrophysical Research Telescope obtained during 2023 are presented: 1913 measurements of 1533 resolved pairs or subsystems (median separation 0.″16) and nonresolutions of 552 ...
Andrei Tokovinin, Brian D. Mason, Rene A. Mendez, Edgardo Costa   +3 more
doaj   +1 more source

Five Massive Contact Binaries with Twin Components in LMC

The Astrophysical Journal, 2023
Massive contact binaries refer to the close binary systems in which the components have filled their respective Roche lobes and share a common envelope with early-type spectra.
Fu-Xing Li, Sheng-Bang Qian, Chu-Qi Wu, Min-Yu Li, Er-Gang Zhao, Wen-Ping Liao, Li-Ying Zhu, Qi-Bin Sun, Jia Zhang   +8 more
doaj   +1 more source

A catalogue of young runaway Hipparcos stars within 3kpc from the Sun

, 2010
Traditionally runaway stars are O and B type stars with large peculiar velocities.We want to extend this definition to young stars (up to ~50 Myr) of any spectral type and identify those present in the Hipparcos catalogue applying different selection ...
Abrahamyan, Aumer, Baraffe, Barbier-Brossat, Bekenstein, Bernasconi, Bertelli, Bertelli, Bertout, Blaauw, Blaha, Bobylev, Brown, Buscombe, Chauvin, Claret, Conlon, Cruz-González, Cutispoto, D'Antona, D'Antona, Dambis, De Medeiros, de Wit, de Zeeuw, Dehnen, Delhaye, Ducourant, Egret, Evans, Favata, Gaidos, Gaidos, Garmany, Gies, Gontcharov, Grenier, Haefner, Hawley, Hernández, Hohle, Hoogerwerf, Jeffries, Karatas, Kenyon, Kharchenko, Kharchenko, Kilkenny, Köhler, Lawson, Leonard, M. M. Hohle, Maeder, Makarov, Marques, Martin, Mdzinarishvili, Micela, Mihalas, Moffat, Moffat, Montes, N. Tetzlaff, Neuhäuser, Neuhäuser, Neuhäuser, Neuhäuser, Neuhäuser, Palla, Pedoussaut, Perryman, Philp, Pietrinferni, Pourbaix, Poveda, R. Neuhäuser, Reid, Schaller, Schmidt-Kaler, Siess, Smith, Soderblom, Song, Stone, Stone, Strassmeier, Tagliaferri, Teixeira, Tetzlaff, The, Torres, Uyanıker, Valenti, van den Ancker, van Leeuwen, Vitrichenko, Webb, White, Wichmann, Wright, Zacharias, Zuckerman, Zuckerman, Zwitter   +103 more
core   +1 more source

Secondary star formation within massive star clusters: Origin of multiple stellar populations in globular clusters [PDF]

, 2004
We numerically investigate whether and how gaseous ejecta from AGB stars can be converted into new stars within originally massive star clusters (MSCs) in order to understand the origin of multiple stellar populations in globular clusters (GCs). We adopt
Bekki, Kenji
core   +3 more sources

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

The Discovery of Two Quadruple Star Systems with the Second and Third Shortest Outer Periods

The Astrophysical Journal
We present the discovery of two quadruple star systems—TIC 285853156 and TIC 392229331—each consisting of two bound eclipsing binary stars. Among the most compact quadruples known, TIC 392229331 and TIC 285853156 have the second and third shortest outer ...
Brian P. Powell, Guillermo Torres, Veselin B. Kostov, Tamás Borkovits, Saul A. Rappaport, Maxwell Moe, David W. Latham, Thomas L. Jacobs, Robert Gagliano, Martti H. K. Kristiansen, Mark Omohundro, Hans M. Schwengeler, Daryll M. LaCourse, Ivan A. Terentev, Allan R. Schmitt   +14 more
doaj   +1 more source

The Effect of Stellar Rotation on Colour-Magnitude Diagrams: On the apparent presence of multiple populations in intermediate age stellar clusters

, 2009
A significant number of intermediate age clusters (1-2 Gyr) in the Magellanic Clouds appear to have multiple stellar populations within them, derived from bi-modal or extended main sequence turn offs. If this is interpreted as an age spread, the multiple
Bekki, Boesgaard, Cardini, Charbonnel, Collins, D'Ercole, D'Souza, De Mink, Donati, Eldridge, Faulkner, Fossati, Gaige, Glatt, Goudfrooij, Gray, Heger, Huang, Huang, Hunter, Mackey, Mackey, Massey, Mestel, Meynet, Milone, N. Bastian, Palacios, Pietrinferni, Piotto, Pérez Hernández, Royer, S. E. de Mink, Salpeter, Schatzman, Talon, Townsend, von Zeipel, Westera, Yoon   +39 more
core   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

Spiral arm crossings inferred from ridges in Gaia stellar velocity distributions

, 2018
The solar neighborhood contains disc stars that have recently crossed spiral arms in the Galaxy. We propose that boundaries in local velocity distributions separate stars that have recently crossed or been perturbed by a particular arm from those that ...
Anders, Friedrich, Carrillo, Ismael, Chiappini, Cristina, Hilmi, Tariq, Khalatyan, Arman, McMillan, Paul, Minchev, Ivan, Monari, Giacomo, Quillen, Alice C., Steinmetz, Matthias   +9 more
core   +1 more source

Speckle interferometry of nearby multiple stars. IV. Measurements in 2004 and new orbits [PDF]

, 2007
The results of speckle interferometric observations of 104 binary and 6 triple stars performed at the BTA 6 m telescope in 2004 October are presented.
I. Balega, Y. Balega, A. Maksimov, E. V. Malogolovets, D. Rastegaev, Z. U. Shkhagosheva, G. S. A. Observatory, Russia, Max Planck Institut fur Radioastronomie, Germany   +9 more
semanticscholar   +1 more source