Zobrazeno 1 - 10
of 400
pro vyhledávání: '"Narsireddy A"'
Autor:
Narsireddy Anugu, Douglas R. Gies, Rachael M. Roettenbacher, John D. Monnier, Miguel Montargés, Antoine Mérand, Fabien Baron, Gail H. Schaefer, Katherine A. Shepard, Stefan Kraus, Matthew D. Anderson, Isabelle Codron, Tyler Gardner, Mayra Gutierrez, Rainer Köhler, Karolina Kubiak, Cyprien Lanthermann, Olli Majoinen, Nicholas J. Scott, Wolfgang Vollmann
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 1, p L5 (2024)
Stars with initial masses larger than 8 M _⊙ undergo substantial mass loss through mechanisms that remain elusive. Unraveling the origins of this mass loss is important for comprehending the evolutionary path of these stars, the type of supernova e
Externí odkaz:
https://doaj.org/article/e0df7c00a1a44228a686453fb20e1664
Autor:
Daniel Echeverri, Jerry W. Xuan, John D. Monnier, Jacques-Robert Delorme, Jason J. Wang, Nemanja Jovanovic, Katelyn Horstman, Garreth Ruane, Bertrand Mennesson, Eugene Serabyn, Dimitri Mawet, J. Kent Wallace, Sofia Hillman, Ashley Baker, Randall Bartos, Benjamin Calvin, Sylvain Cetre, Greg Doppmann, Luke Finnerty, Michael P. Fitzgerald, Chih-Chun Hsu, Joshua Liberman, Ronald López, Maxwell Millar-Blanchaer, Evan Morris, Jacklyn Pezzato, Jean-Baptiste Ruffio, Ben Sappey, Tobias Schofield, Andrew J. Skemer, Ji Wang, Yinzi Xin, Narsireddy Anugu, Sorabh Chhabra, Noura Ibrahim, Stefan Kraus, Gail H. Schaefer, Cyprien Lanthermann
Publikováno v:
The Astrophysical Journal Letters, Vol 965, Iss 2, p L15 (2024)
Vortex fiber nulling (VFN) is a technique for detecting and characterizing faint companions at small separations from their host star. A near-infrared (∼2.3 μ m) VFN demonstrator mode was deployed on the Keck Planet Imager and Characterizer (KPIC)
Externí odkaz:
https://doaj.org/article/29bcb249bb7044ffb9d1f1f9e09b3bc6
Autor:
Katherine Shepard, Douglas R. Gies, Gail H. Schaefer, Narsireddy Anugu, Fabien R. Baron, Cyprien Lanthermann, John D. Monnier, Stefan Kraus, Theo ten Brummelaar
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 2, p 236 (2024)
W Serpentis is an eclipsing binary system and the prototype of the Serpentid class of variable stars. These are interacting binaries experiencing intense mass transfer and mass loss. However, the identities and properties of both stars in W Ser remai
Externí odkaz:
https://doaj.org/article/3beb98d6023b4f49bc5e8473337f7b3c
Autor:
Amanda Holdsworth, Noel Richardson, Gail H. Schaefer, Jan J. Eldridge, Grant M. Hill, Becca Spejcher, Jonathan Mackey, Anthony F. J. Moffat, Felipe Navarete, John D. Monnier, Stefan Kraus, Jean-Baptiste Le Bouquin, Narsireddy Anugu, Sorabh Chhabra, Isabelle Codron, Jacob Ennis, Tyler Gardner, Mayra Gutierrez, Noura Ibrahim, Aaron Labdon, Cyprien Lanthermann, Benjamin R. Setterholm
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 2, p 185 (2024)
Classical Wolf–Rayet (WR) stars are descendants of massive OB-type stars that have lost their hydrogen-rich envelopes and are in the final stages of stellar evolution, possibly exploding as Type Ib/c supernovae. It is understood that the mechanisms
Externí odkaz:
https://doaj.org/article/e72f44158261475e95568c22e71a6fd9
Autor:
Noel D. Richardson, Gail H. Schaefer, Jan J. Eldridge, Rebecca Spejcher, Amanda Holdsworth, Ryan M. Lau, John D. Monnier, Anthony F. J. Moffat, Gerd Weigelt, Peredur M. Williams, Stefan Kraus, Jean-Baptiste Le Bouquin, Narsireddy Anugu, Sorabh Chhabra, Isabelle Codron, Jacob Ennis, Tyler Gardner, Mayra Gutierrez, Noura Ibrahim, Aaron Labdon, Cyprien Lanthermann, Benjamin R. Setterholm
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 1, p 78 (2024)
Classical Wolf–Rayet (W-R) stars are the descendants of massive OB stars that have lost their hydrogen envelopes and are burning helium in their cores prior to exploding as Type Ib/c supernovae. The mechanisms for losing their hydrogen envelopes ar
Externí odkaz:
https://doaj.org/article/d7bd2edd45af40cb8d65e5c6d10efcab
Autor:
Nancy Remage Evans, Gail H. Schaefer, Alexandre Gallenne, Guillermo Torres, Elliott P. Horch, Richard I. Anderson, John D. Monnier, Rachael M. Roettenbacher, Fabien Baron, Narsireddy Anugu, James W. Davidson Jr., Pierre Kervella, Garance Bras, Charles Proffitt, Antoine Mérand, Margarita Karovska, Jeremy Jones, Cyprien Lanthermann, Stefan Kraus, Isabelle Codron, Howard E. Bond, Giordano Viviani
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 190 (2024)
The 30 yr orbit of the Cepheid Polaris has been followed with observations by the Center for High Angular Resolution Astronomy (CHARA) Array from 2016 through 2021. An additional measurement has been made with speckle interferometry at the Apache Poi
Externí odkaz:
https://doaj.org/article/7c3ba5741f58471792c01d41d6d9f3cc
Autor:
Narsireddy Anugu, Fabien Baron, John D. Monnier, Douglas R. Gies, Rachael M. Roettenbacher, Gail H. Schaefer, Miguel Montargès, Stefan Kraus, Jean-Baptiste Le Bouquin, Matthew D. Anderson, Theo ten Brummelaar, Isabelle Codron, Christopher D. Farrington, Tyler Gardner, Mayra Gutierrez, Rainer Köhler, Cyprien Lanthermann, Ryan Norris, Nicholas J. Scott, Benjamin R. Setterholm, Norman L. Vargas
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 113 (2024)
Massive evolved stars such as red supergiants and hypergiants are potential progenitors of Type II supernovae, and they are known for ejecting substantial amounts of matter, up to half their initial mass, during their final evolutionary phases. The r
Externí odkaz:
https://doaj.org/article/4400894db0294b05b24530146b40dd70
Autor:
Nancy Remage Evans, Alexandre Gallenne, Pierre Kervella, Antoine Mérand, John Monnier, Richard I Anderson, H. Moritz Günther, Charles Proffitt, Elaine M. Winston, Grzegorz Pietrzynski, Wolfgang Gieren, Joanna Kuraszkiewicz, Narsireddy Anugu, Rachael M. Roettenbacher, Cyprien Lanthermann, Mayra Gutierrez, Gail Schaefer, Benjamin R. Setterholm, Noura Ibrahim, Stefan Kraus
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 145 (2024)
The Cepheid AW Per is a component in a multiple system with a long-period orbit. The radial velocities of Griffin cover the 38 yr orbit well. An extensive program of interferometry with the Center for High Angular Resolution Astronomy array is report
Externí odkaz:
https://doaj.org/article/05c127c3eae6454381619399bc24a007
Autor:
Guillermo Torres, Gail H. Schaefer, Robert P. Stefanik, David W. Latham, Andrew F. Boden, Narsireddy Anugu, Jeremy W. Jones, Robert Klement, Stefan Kraus, Cyprien Lanthermann, John D. Monnier
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 31 (2024)
We report long-baseline interferometric observations with the CHARA Array that resolve six previously known double-lined spectroscopic binary systems in the Hyades cluster, with orbital periods ranging from 3 to 358 days: HD 27483, HD 283882, HD 2687
Externí odkaz:
https://doaj.org/article/1cc85ce0070443c4b45d108eeb5363ff
Autor:
Robert Klement, Thomas Rivinius, Douglas R. Gies, Dietrich Baade, Antoine Mérand, John D. Monnier, Gail H. Schaefer, Cyprien Lanthermann, Narsireddy Anugu, Stefan Kraus, Tyler Gardner
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 70 (2024)
Rapid rotation and nonradial pulsations enable Be stars to build decretion disks, where the characteristic line emission forms. A major but unconstrained fraction of Be stars owe their rapid rotation to mass and angular momentum transfer in a binary.
Externí odkaz:
https://doaj.org/article/0da8682752b84672a5e5dfabde9c183b