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First visual orbit for the prototypical colliding-wind binary WR 140

Wolf-Rayet stars represent one of the final stages of massive stellar evolution. Relatively little is known about this short-lived phase and we currently lack reliable mass, distance, and binarity determinations for a representative sample.…

太阳与恒星天体物理 · 物理学 2015-06-03 J. D. Monnier , Ming Zhao , E. Pedretti , R. Millan-Gabet , J. P. Berger , W. Traub , F. P. Schloerb , T. ten Brummelaar , H. McAlister , S. Ridgway , L. Sturmann , J. Sturmann , N. Turner , F. Baron , S. Kraus , A. Tannirkulam , P. M. Williams

Direct constraint on the distance of y2 Velorum from AMBER/VLTI observations

In this work, we present the first AMBER observations, of the Wolf-Rayet and O (WR+O) star binary system y2 Velorum. The AMBER instrument was used with the telescopes UT2, UT3, and UT4 on baselines ranging from 46m to 85m. It delivered…

天体物理学 · 物理学 2009-11-11 F. Millour , R. G. Petrov , O. Chesneau , D. Bonneau , L. Dessart , C. Bechet , I. Tallon-Bosc , M. Tallon , E. Thiébaut , F. Vakili , F. Malbet , D. Mourard , G. Zins , A. Roussel , S. Robbe-Dubois , P. Puget , K. Perraut , F. Lisi , E. Le Coarer , S. Lagarde , P. Kern , L. Glück , G. Duvert , A. Chelli , Y. Bresson , U. Beckmann , P. Antonelli , G. Weigelt , N. Ventura , M. Vannier , J. -C. Valtier , L. Testi , E. Tatulli , D. Tasso , P. Stefanini , P. Stee , W. Solscheid , D. Schertl , P. Salinari , M. Sacchettini , A. Richichi , F. Reynaud , S. Rebattu , Y. Rabbia , T. Preibisch , C. Perrier , F. Pacini , K. Ohnaka , E. Nussbaum , D. Mouillet , J. -L. Monin , P. Mège , P. Mathias , G. Martinot-Lagarde , G. Mars , A. Marconi , Y. Magnard , B. Lopez , D. Le Contel , J. -M. Le Contel , S. Kraus , D. Kamm , K. -H. Hofmann , O. Hernandez Utrera , M. Heininger , M. Heiden , C. Gil , E. Giani , A. Glentzlin , S. Gennari , A. Gallardo , D. Fraix-Burnet , R. Foy , E. Fossat , T. Forveille , D. Ferruzzi , P. Feautrier , M. Dugué , T. Driebe , A. Domiciano De Souza , A. Delboulbé , C. Connot , J. Colin , J. -M. Clausse , F. Cassaing , S. Busoni , S. Bonhomme , T. Blöcker , J. Behrend , C. Baffa , E. Aristidi , B. Arezki , K. Agabi , B. Acke , M. Accardo , M. Kiekebusch , F. Rantakyrö , Markus Schoeller

The First Dynamical Mass Determination of a Nitrogen-rich Wolf-Rayet Star using a Combined Visual and Spectroscopic Orbit

We present the first visual orbit for the nitrogen-rich Wolf-Rayet binary, WR 133 (WN5o + O9I) based on observations made with the CHARA Array and the MIRC-X combiner. This orbit represents the first visual orbit for a WN star and only the…

太阳与恒星天体物理 · 物理学 2021-02-17 Noel D. Richardson , Laura Lee , Gail Schaefer , Tomer Shenar , Andreas A. C. Sander , Grant M. Hill , Andrew G. Fullard , John D. Monnier , Narsireddy Anugu , Claire L Davies , Tyler Gardner , Cyprien Lanthermann , Stefan Kraus , Benjamin R. Setterholm

Near IR Spectroscopic monitoring of WR 140 during the 2001 periastron passage

We present new spectra of WR 140 (HD 193793) in the JHK bands with some covering the 1.083-micron He I emission line at higher resolution, observed between 2000 October and 2003 May to cover its 2001 periastron passage. The WC7 + O4-5…

天体物理学 · 物理学 2009-11-10 W. P. Varricatt , P. M. Williams , N. M. Ashok

The orbit and stellar masses of the archetype colliding-wind binary WR 140

We present updated orbital elements for the Wolf-Rayet (WR) binary WR\,140 (HD\,193793; WC7pd + O5.5fc). The new orbital elements were derived using previously published measurements along with {\color{black}160} new radial velocity…

太阳与恒星天体物理 · 物理学 2021-05-12 Joshua D. Thomas , Noel D. Richardson , J. J. Eldridge , Gail H. Schaefer , John D. Monnier , Hugues Sana , Anthony F. J. Moffat , Peredur Williams , Michael F. Corcoran , Ian R. Stevens , Gerd Weigelt , Farrah D. Zainol , Narsireddy Anugu , Jean-Baptiste Le Bouquin , Theo ten Brummelaar , Fran Campos , Andrew Couperus , Claire L. Davies , Jacob Ennis , Thomas Eversberg , Oliver Garde , Tyler Gardner , Joan Guarro Fló , Stefan Kraus , Aaron Labdon , Cyprien Lanthermann , Robin Leadbeater , T. Lester , Courtney Maki , Brendan McBride , Dogus Ozuyar , J. Ribeiro , Benjamin Setterholm , Berthold Stober , Mackenna Wood , Uwe Zurmühl

Wolf-Rayet stars probed by AMBER/VLTI

Massive stars deeply influence their surroundings by their luminosity and the injection of kinetic energy. So far, they have mostly been studied with spatially unresolved observations, although evidence of geometrical complexity of their…

天体物理学 · 物理学 2009-11-13 Florentin Millour , Olivier Chesneau , Thomas Driebe , Romain Petrov , Daniel Bonneau , Luc Dessart , Karl-Heinz Hofmann , Gerd Weigelt

The CHARA Array resolves the long-period Wolf-Rayet binaries WR 137 and WR 138

We report on interferometric observations with the CHARA Array of two classical Wolf-Rayet stars in suspected binary systems, namely WR 137 and WR 138. In both cases, we resolve the component stars to be separated by a few milliarcseconds.…

太阳与恒星天体物理 · 物理学 2016-09-07 Noel D. Richardson , Tomer Shenar , Olivier Roy-Loubier , Gail Schaefer , Anthony F. J. Moffat , Nicole St-Louis , Douglas R. Gies , Chris Farrington , Grant M. Hill , Peredur M. Williams , Kathryn Gordon , Herbert Pablo , Tahina Ramiaramanantsoa

Proper motions of new dust in the colliding-wind binary WR 140

The eccentric WR+O binary system WR 140 produces dust for a few months at intervals of 7.94 yrs coincident with periastron passage. We present the first resolved images of this dust shell, at binary phases ~0.039 and ~0.055, using aperture…

天体物理学 · 物理学 2009-11-07 J. D. Monnier , P. G. Tuthill , W. C. Danchi

Imaging reconstruction for infrared interferometry: first images of YSOs environment

The study of protoplanetary disks, where the planets are believed to form, will certainly allow the formation of our Solar System to be understood. To conduct observations of these objects at the milli-arcsecond scale, infrared…

天体物理学 · 物理学 2009-11-13 S. Renard , F. Malbet , E. Thiebaut , J. -P. Berger

Discovery of Extremely Large-Amplitude Quasi-Periodic Photometric Variability in WC9-Type Wolf-Rayet Binary, WR 104

We discovered that the Wolf-Rayet (WR)+OB star binary, WR 104, renowned for its associated "dusty pinwheel nebula" recently spatially resolved with infrared interferometry, exhibits strong quasi-periodic optical variations with a full…

天体物理学 · 物理学 2015-06-24 T. Kato , K. Haseda , H. Yamaoka , K. Takamizawa

Competitive X-ray and Optical Cooling in the Collisionless Shocks of WR 140

WR 140 is a long-period, highly eccentric Wolf-Rayet star binary system with exceptionally well-determined orbital and stellar parameters. Bright, variable X-ray emission is generated in shocks produced by the collision of the winds of the…

高能天体物理现象 · 物理学 2022-01-05 A. M. T. Pollock , M. F. Corcoran , I. R. Stevens , C. M. P. Russell , K. Hamaguchi , P. M. Williams , A. F. J. Moffat , G. Weigelt , V. Shenavrin , N. D. Richardson , D. Espinoza , S. A. Drake

Spatially resolved STIS spectra of WR+OB binaries with colliding winds

We present spatially resolved spectra of the visual WR+OB massive binaries WR86, WR146, and WR147, obtained with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope. The systems are classified as follows: WR86 = WC7…

天体物理学 · 物理学 2009-11-07 Sebastien Lepine , Debra Wallace , Michael M. Shara , Anthony F. J. Moffat , Virpi S. Niemela

The Orbit and Distance of WR140 - Proceedings of "Stellar Winds in Interaction" 2010

A campaign of 35 epochs of milli-arcsec resolution VLBA observations of the archetype collidingwind WR+O star binary system WR140 show the wind-collision region (WCR) as a bow-shaped arc of emission that rotates as the highly eccentric…

太阳与恒星天体物理 · 物理学 2011-01-06 S. M. Dougherty , V. Trenton , A. J. Beasley

First AMBER/VLTI observations of hot massive stars

AMBER is the first near infrared focal instrument of the VLTI. It combines three telescopes and produces spectrally resolved interferometric measures. This paper discusses some preliminary results of the first scientific observations of…

天体物理学 · 物理学 2016-08-16 R. G. Petrov , F. Millour , O. Chesneau , G. Weigelt , D. Bonneau , Ph. Stee , S. Kraus , D. Mourard , A. Meilland , F. Malbet , F. Lisi , P. Kern , U. Beckmann , S. Lagarde , S. Gennari , E. Lecoarer , Th. Driebe , M. Accardo , S. Robbe-Dubois , K. Ohnaka , S. Busoni , A. Roussel , G. Zins , J. Behrend , D. Ferruzi , Y. Bresson , G. Duvert , E. Nussbaum , A. Marconi , Ph. Feautrier , M. Dugué , A. Chelli , E. Tatulli , M. Heininger , A. Delboulbé , S. Bonhomme , D. Schertl , L. Testi , Ph. Mathias , J. -L. Monin , L. Gluck , K. H. Hofmann , P. Salinari , P. Puget , J. -M. Clausse , D. Fraix-Burnet , R. Foy , A. Isella

Visual Orbits of Wolf-Rayet Stars II: The Orbit of the Nitrogen-Rich WR Binary WR 138 measured with the CHARA Array

Classical Wolf-Rayet 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…

太阳与恒星天体物理 · 物理学 2024-11-05 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

Optical linear polarization measurements of WR massive binary and single stars

We present optical (UBVRI) linear polarimetric observations of 8 Wolf-Rayet (WR) massive binaries and single stars. We have corrected the observed values for the interstellar extinction and polarization by the interstellar medium to obtain…

星系天体物理 · 物理学 2013-09-05 Stavros Akras , Julio Ramirez-Velez , David Hiriart , Jose Manuel Lopez

Nested Dust Shells around the Wolf-Rayet Binary WR 140 observed with JWST

Massive colliding-wind binaries that host a Wolf-Rayet (WR) star present a potentially important source of dust and chemical enrichment in the interstellar medium (ISM). However, the chemical composition and survival of dust formed from…

太阳与恒星天体物理 · 物理学 2022-10-13 Ryan M. Lau , Matthew J. Hankins , Yinuo Han , Ioannis Argyriou , Michael F. Corcoran , Jan J. Eldridge , Izumi Endo , Ori D. Fox , Macarena Garcia Marin , Theodore R. Gull , Olivia C. Jones , Kenji Hamaguchi , Astrid Lamberts , David R. Law , Thomas Madura , Sergey V. Marchenko , Hideo Matsuhara , Anthony F. J. Moffat , Mark R. Morris , Patrick W. Morris , Takashi Onaka , Michael E. Ressler , Noel D. Richardson , Christopher M. P. Russell , Joel Sanchez-Bermudez , Nathan Smith , Anthony Soulain , Ian R. Stevens , Peter Tuthill , Gerd Weigelt , Peredur M. Williams , Ryodai Yamaguchi

Orbitally modulated dust formation by the WC7+O5 colliding-wind binary WR140

We present high-resolution infrared (2--18 micron) images of the archetypal periodic dust-making Wolf-Rayet binary system WR140 (HD 193793) taken between 2001 and 2005, and multi-colour (J -- [19.5]) photometry observed between 1989 and…

太阳与恒星天体物理 · 物理学 2014-11-18 P. M. Williams , S. V. Marchenko , A. P. Marston , A. F. J. Moffat , W. P. Varricatt , S. M. Dougherty , M. R. Kidger , L. Morbidelli , M. Tapia

Suzaku monitoring of the Wolf-Rayet binary WR140 around periastron passage: An approach for quantifying the wind parameters

Suzaku observations of the Wolf-Rayet binary WR 140 (WC7pd+O5.5fc) were made at four different times around periastron passage in 2009 January. The spectra changed in shape and flux with the phase. As periastron approached, the column…

高能天体物理现象 · 物理学 2015-11-11 Yasuharu Sugawara , Yoshitomo Maeda , Yohko Tsuboi , Kenji Hamaguchi , Michael Corcoran , A. M. T. Pollock , Anthony F. J. Moffat , Peredur M. Williams , Sean Dougherty , Julian Pittard

High resolution radio observations of the colliding-wind binary WR140

Milli-arcsecond resolution Very Long Baseline Array (VLBA) observations of the archetype WR+O star colliding-wind binary (CWB) system WR140 are presented for 23 epochs between orbital phases 0.74 and 0.97. At 8.4 GHz, the emission in the…

天体物理学 · 物理学 2009-11-10 S. M. Dougherty , A. J. Beasley , M. J. Claussen , B. A. Zauderer , N. J. Bolingbroke