Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Williams, Peredur M"'
Autor:
Richardson, Noel D., Schaefer, Gail H., Eldridge, Jan J., Spejcher, Rebecca, Holdsworth, Amanda, Lau, Ryan M., Monnier, John D., Moffat, Anthony F. J., Weigelt, Gerd, Williams, Peredur M., Kraus, Stefan, Bouquin, Jean-Baptiste Le, Anugu, Narsireddy, Chhabra, Sorabh, Codron, Isabelle, Ennis, Jacob, Gardner, Tyler, Gutierrez, Mayra, Ibrahim, Noura, Labdon, Aaron, Lanthermann, Cyprien, Setterholm, Benjamin R.
Classical Wolf-Rayet 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 are either
Externí odkaz:
http://arxiv.org/abs/2410.09259
Autor:
Richardson, Noel D., Daly, Andrea R., Williams, Peredur M., Hill, Grant M., Shenavrin, Victor I., Endo, Izumi, Chené, André-Nicolas, Karnath, Nicole, Lau, Ryan M., Moffat, Anthony F. J., Weigelt, Gerd
Several long-period binaries with a carbon-rich Wolf-Rayet star and an O 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 orbi
Externí odkaz:
http://arxiv.org/abs/2405.10454
Autor:
Lau, Ryan M., Hankins, Matthew J., Sanchez-Bermudez, Joel, Thatte, Deepashri, Soulain, Anthony, Cooper, Rachel A., Sivaramakrishnan, Anand, Corcoran, Michael F., Greenbaum, Alexandra Z., Gull, Theodore R., Han, Yinuo, Jones, Olivia C., Madura, Thomas, Moffat, Anthony F. J., Morris, Mark R., Onaka, Takashi, Russell, Christopher M. P., Richardson, Noel D., Smith, Nathan, Tuthill, Peter, Volk, Kevin, Weigelt, Gerd, Williams, Peredur M.
We present infrared aperture masking interferometry (AMI) observations of newly formed dust from the colliding winds of the massive binary system Wolf-Rayet (WR) 137 with JWST using the Near Infrared Imager and Slitless Spectrograph (NIRISS). NIRISS
Externí odkaz:
http://arxiv.org/abs/2311.15948
Autor:
Peatt, Megan J., Richardson, Noel D., Williams, Peredur M., Karnath, Nicole, Shenavrin, Victor I., Lau, Ryan M., Moffat, Anthony F. J., Weigelt, Gerd
WR 137 (HD 192641) is a binary system consisting of a carbon-rich Wolf-Rayet star and an Oe companion star in a 13-year orbit. Near periastron, the winds of the two stars collide and form carbonaceous dust. We obtained three mid-infrared grism spectr
Externí odkaz:
http://arxiv.org/abs/2308.11798
Autor:
Lau, Ryan M., Wang, Jason, Hankins, Matthew J., Currie, Thayne, Deo, Vincent, Endo, Izumi, Guyon, Olivier, Han, Yinuo, Jones, Anthony P., Jovanovic, Nemanja, Lozi, Julien, Moffat, Anthony F. J., Onaka, Takashi, Ruane, Garreth, Sander, Andreas A. C., Tinyanont, Samaporn, Tuthill, Peter G., Weigelt, Gerd, Williams, Peredur M., Vievard, Sebastien
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 years and an orbital eccentricity of 0.9. Throughout the past several decad
Externí odkaz:
http://arxiv.org/abs/2305.14557
Autor:
Lau, Ryan M., Hankins, Matthew J., Han, Yinuo, Argyriou, Ioannis, Corcoran, Michael F., Eldridge, Jan J., Endo, Izumi, Fox, Ori D., Marin, Macarena Garcia, Gull, Theodore R., Jones, Olivia C., Hamaguchi, Kenji, Lamberts, Astrid, Law, David R., Madura, Thomas, Marchenko, Sergey V., Matsuhara, Hideo, Moffat, Anthony F. J., Morris, Mark R., Morris, Patrick W., Onaka, Takashi, Ressler, Michael E., Richardson, Noel D., Russell, Christopher M. P., Sanchez-Bermudez, Joel, Smith, Nathan, Soulain, Anthony, Stevens, Ian R., Tuthill, Peter, Weigelt, Gerd, Williams, Peredur M., Yamaguchi, Ryodai
Publikováno v:
Lau, R.M., Hankins, M.J., Han, Y. et al. Nested dust shells around the Wolf-Rayet binary WR 140 observed with JWST. Nat Astron (2022)
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 such systems
Externí odkaz:
http://arxiv.org/abs/2210.06452
Autor:
Endo, Izumi, Lau, Ryan M., Sakon, Itsuki, Onaka, Takashi, Williams, Peredur M., Shenavrin, Victor I.
We present the detection of a broad 8 $\mu$m feature in newly formed dust around the carbon-rich Wolf-Rayet (WC) binary WR 125 from N-band low-resolution (NL; R$\sim$250) spectroscopy between 7.3-13.6 $\mu$m and N-band (11.7 $\mu$m) and Q-band (18.8
Externí odkaz:
http://arxiv.org/abs/2204.13259
Mid-infrared photometry of the Wolf-Rayet star HD 38030 in the Large Magellanic Cloud from the NEOWISE-R mission show it to have undergone a dust-formation episode in 2018 and the dust to have cooled in 2019-20. New spectroscopy with the MagE spectro
Externí odkaz:
http://arxiv.org/abs/2106.03781
Autor:
Lau, Ryan M., Tinyanont, Samaporn, Hankins, Matthew J., Ashley, Michael C. B., De, Kishalay, Filippenko, Alexei V., Hillenbrand, Lynne A., Kasliwal, Mansi M., Mauerhan, Jon C., Moffat, Anthony F. J., Moore, Anna M., Smith, Nathan, Soon, Jamie, Soria, Roberto, Travouillon, Tony, van der Hucht, Karel A., Williams, Peredur M., Zheng, WeiKang
We present optical and infrared (IR) light curves of NaSt1, also known as Wolf-Rayet (WR) 122, with observations from Palomar Gattini-IR (PGIR), the Zwicky Transient Facility (ZTF), the Katzman Automatic Imaging Telescope (KAIT), the Asteroid Terrest
Externí odkaz:
http://arxiv.org/abs/2103.08771
Autor:
Williams, Peredur M., Varricatt, Watson P., Chené, André-Nicolas, Corcoran, Michael F., Gull, Ted R., Hamaguchi, Kenji, Moffat, Anthony F. J., Pollock, Andrew M. T., Richardson, Noel D., Russell, Christopher M. P., Sander, Andreas A. C., Stevens, Ian R., Weigelt, Gerd
We present spectroscopy of the P~Cygni profile of the 1.083-micron He I line in the WC7 + O5 colliding-wind binary (CWB) WR 140 (HD 193793), observed in 2008, before its periastron passage in 2009, and in 2016-17, spanning the subsequent periastron p
Externí odkaz:
http://arxiv.org/abs/2102.09445