Zobrazeno 1 - 10
of 568
pro vyhledávání: '"A F J, Moffat"'
Autor:
Noel D. Richardson, Andrea R. Daly, Peredur M. Williams, Grant M. Hill, Victor I. Shenavrin, Izumi Endo, André-Nicolas Chené, Nicole Karnath, Ryan M. Lau, Anthony F. J. Moffat, Gerd Weigelt
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 2, p 140 (2024)
Several long-period binaries with a carbon-rich Wolf–Rayet star and an OB star produce dust in their wind collisions. In eccentric binaries, this is seen most strongly near periastron passage. The exact conditions leading to dust creation require t
Externí odkaz:
https://doaj.org/article/338b8146e6c74513954adac9c77c9d17
Autor:
Ryan M. Lau, Matthew J. Hankins, Joel Sanchez-Bermudez, Deepashri Thatte, Anthony Soulain, Rachel A. Cooper, Anand Sivaramakrishnan, Michael F. Corcoran, Alexandra Z. Greenbaum, Theodore R. Gull, Yinuo Han, Olivia C. Jones, Thomas Madura, Anthony F. J. Moffat, Mark R. Morris, Takashi Onaka, Christopher M. P. Russell, Noel D. Richardson, Nathan Smith, Peter Tuthill, Kevin Volk, Gerd Weigelt, Peredur M. Williams
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 2, p 127 (2024)
We present infrared aperture-masking interferometry (AMI) observations of newly formed dust from the colliding winds of the massive binary Wolf–Rayet system WR 137 with JWST using the Near Infrared Imager and Slitless Spectrograph (NIRISS). NIRISS
Externí odkaz:
https://doaj.org/article/cf35d06a692047969b2b5e0a18f7f0db
Autor:
Augusto Damineli, Noel D. Richardson, Felipe Navarete, Theodore. R. Gull, Eduardo Fernández-Lajús, Anthony F. J. Moffat, Desmond J. Hillier, Gerd Weigelt, Michael F. Corcoran
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 2, p 114 (2024)
Changes in the flux and spectrum of Eta Carinae ( η Car) since 1900 have been attributed to the evolution of the central binary by some. Others suggest evolution in the occulting ejecta. The brightness jump in the 1940s, which coincided with the app
Externí odkaz:
https://doaj.org/article/1523da3e4d7f47cf8f1b7124246d8387
Autor:
Megan J. Peatt, Noel D. Richardson, Peredur M. Williams, Nicole Karnath, Victor I. Shenavrin, Ryan M. Lau, Anthony F. J. Moffat, Gerd Weigelt
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 109 (2023)
WR 137 (HD 192641) is a binary system consisting of a carbon-rich Wolf–Rayet (W-R) star and an Oe companion star in a 13 yr orbit. Near periastron, the winds of the two stars collide and form carbonaceous dust. We obtained three mid-infrared grism
Externí odkaz:
https://doaj.org/article/a9eb931c1d164effb43c1ab385002cef
Autor:
Theodore R. Gull, Henrik Hartman, Mairan Teodoro, D. John Hillier, Michael F. Corcoran, Augusto Damineli, Kenji Hamaguchi, Thomas Madura, Anthony F. J. Moffat, Patrick Morris, Krister Nielsen, Noel D. Richardson, Ian R. Stevens, Gerd Weigelt
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 1, p 104 (2023)
Previous Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph (STIS) longslit observations of Eta Carinae ( η Car) identified numerous absorption features in both the stellar spectrum, and in the adjacent nebular spectra, along our line
Externí odkaz:
https://doaj.org/article/f1f97356007f4faca98977458bdd4931
Autor:
Augusto Damineli, Desmond J. Hillier, Felipe Navarete, Anthony F. J. Moffat, Gerd Weigelt, Michael F. Corcoran, Theodore. R. Gull, Noel D. Richardson, Peter Ho, Thomas I. Madura, David Espinoza-Galeas, Henrik Hartman, Patrick Morris, Connor S. Pickett, Ian R. Stevens, Christopher M. P. Russell, Kenji Hamaguchi, Francisco J. Jablonski, Mairan Teodoro, Padric McGee, Paulo Cacella, Bernard Heathcote, Ken M. Harrison, Mark Johnston, Terry Bohlsen, Giorgio Di Scala
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 1, p 65 (2023)
Eta Carinae ( η Car) exhibits a unique set of P Cygni profiles with both broad and narrow components. Over many decades, the spectrum has changed—there has been an increase in observed continuum fluxes and a decrease in Fe ii and H i emission-line
Externí odkaz:
https://doaj.org/article/86e9a73b56804e269749efd027e693c9
Autor:
Ryan M. Lau, Jason Wang, Matthew J. Hankins, Thayne Currie, Vincent Deo, Izumi Endo, Olivier Guyon, Yinuo Han, Anthony P. Jones, Nemanja Jovanovic, Julien Lozi, Anthony F. J. Moffat, Takashi Onaka, Garreth Ruane, Andreas A. C. Sander, Samaporn Tinyanont, Peter G. Tuthill, Gerd Weigelt, Peredur M. Williams, Sebastien Vievard
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 2, p 89 (2023)
Wolf-Rayet (WR) 140 is the archetypal periodic dust-forming colliding-wind binary that hosts a carbon-rich WR (WC) star and an O-star companion with an orbital period of 7.93 yr and an orbital eccentricity of 0.9. Throughout the past few decades, mul
Externí odkaz:
https://doaj.org/article/9bd216773ffa43d7a08a9226c15c504b
Publikováno v:
Universe, Vol 8, Iss 10, p 514 (2022)
Since the Cosmic Dawn, massive stars have been playing a crucial role as the chemical recycling engines of galaxies that enable the birth of new stars and planetary systems, not only through the strong winds that they exhibit during their relatively
Externí odkaz:
https://doaj.org/article/b1d1d0a64213481688bab532f9b97fd3
Autor:
Werner W. Weiss, Konstanze Zwintz, Rainer Kuschnig, Gerald Handler, Anthony F. J. Moffat, Dietrich Baade, Dominic M. Bowman, Thomas Granzer, Thomas Kallinger, Otto F. Koudelka, Catherine C. Lovekin, Coralie Neiner, Herbert Pablo, Andrzej Pigulski, Adam Popowicz, Tahina Ramiaramanantsoa, Slavek M. Rucinski, Klaus G. Strassmeier, Gregg A. Wade
Publikováno v:
Universe, Vol 7, Iss 6, p 199 (2021)
BRITE-Constellation is devoted to high-precision optical photometric monitoring of bright stars, distributed all over the Milky Way, in red and/or blue passbands. Photometry from space avoids the turbulent and absorbing terrestrial atmosphere and all
Externí odkaz:
https://doaj.org/article/ea1eaae50a7a49ed95580ffc7e659ca9
Autor:
Emily Strawn, Noel D Richardson, Anthony F J Moffat, Nour Ibrahim, Alexis Lane, Connor Pickett, André-Nicolas Chené, Michael F Corcoran, Augusto Damineli, Theodore R Gull, D John Hillier, Patrick Morris, Herbert Pablo, Joshua D Thomas, Ian R Stevens, Mairan Teodoro, Gerd Weigelt
The binary eta Carinae is the closest example of a very massive star, which may have formed through a merger during its Great Eruption in the mid-nineteenth century. We aimed to confirm and improve the kinematics using a spectroscopic data set taken
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac70a651366712ecb424370d47e45b3b
https://resolver.caltech.edu/CaltechAUTHORS:20230314-845495900.63
https://resolver.caltech.edu/CaltechAUTHORS:20230314-845495900.63
