Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Waldron, Wayne"'
Autor:
Nichols, Joy S., Naze, Yael, Huenemoerder, David P., Moffat, Anthony F. J., Miller, Nathan, Lauer, Jennifer, Ignace, Richard, Gayley, Ken, Ramiaramanantsoa, Tahina, Oskinova, Lidia, Hamann, Wolf-Rainer, Richardson, Noel D., Waldron, Wayne L., Dahmer, Matthew
Analysis of the recent long exposure Chandra X-ray observation of the early-type O star zeta Pup shows clear variability with a period previously reported in optical photometric studies. These 813 ks of HETG observations taken over a roughly one year
Externí odkaz:
http://arxiv.org/abs/2011.07066
Autor:
Huenemoerder, David P., Ignace, Richard, Miller, Nathan A., Gayley, Kenneth G., Hamann, Wolf-Rainer, Lauer, Jennifer, Moffat, Anthony F. J., Nazé, Yaël, Nichols, Joy S., Oskinova, Lidia, Richardson, Noel D., Waldron, Wayne
Publikováno v:
ApJ, 893, id52 (10p, 2020)
We have obtained a very deep exposure (813 ks) of $\zeta\,$Puppis (O4 supergiant) with the Chandra/HETG Spectrometer. Here we report on analysis of the 1-9 \r{A} region, especially well suited for Chandra, which has a significant contribution from co
Externí odkaz:
http://arxiv.org/abs/2003.06889
Autor:
Ramiaramanantsoa, Tahina, Moffat, Anthony F. J., Harmon, Robert, Ignace, Richard, St-Louis, Nicole, Vanbeveren, Dany, Shenar, Tomer, Pablo, Herbert, Richardson, Noel D., Howarth, Ian D., Stevens, Ian R., Piaulet, Caroline, St-Jean, Lucas, Eversberg, Thomas, Pigulski, Andrzej, Popowicz, Adam, Kuschnig, Rainer, Zocłońska, Elżbieta, Buysschaert, Bram, Handler, Gerald, Weiss, Werner W., Wade, Gregg A., Rucinski, Slavek M., Zwintz, Konstanze, Luckas, Paul, Heathcote, Bernard, Cacella, Paulo, Powles, Jonathan, Locke, Malcolm, Bohlsen, Terry, Chené, André-Nicolas, Miszalski, Brent, Waldron, Wayne L., Kotze, Marissa M., Kotze, Enrico J., Böhm, Torsten
From $5.5$ months of dual-band optical photometric monitoring at the $1$ mmag level, BRITE-Constellation has revealed two simultaneous types of variability in the O4I(n)fp star $\zeta$ Puppis: one single periodic non-sinusoidal component superimposed
Externí odkaz:
http://arxiv.org/abs/1710.08414
Autor:
Richardson, Noel D., Russell, Christopher M. P., St-Jean, Lucas, Moffat, Anthony F. J., St-Louis, Nicole, Shenar, Tomer, Pablo, Herbert, Hill, Grant M., Ramiaramanantsoa, Tahina, Corcoran, Michael, Hamuguchi, Kenji, Eversberg, Thomas, Miszalski, Brent, Chené, André-Nicolas, Waldron, Wayne, Kotze, Enrico J., Kotze, Marissa M., Luckas, Paul, Cacella, Paulo, Heathcote, Bernard, Powles, Jonathan, Bohlsen, Terry, Locke, Malcolm, Handler, Gerald, Kuschnig, Rainer, Pigulski, Andrzej, Popowicz, Adam, Wade, Gregg A., Weiss, Werner W.
We report on the first multi-color precision light curve of the bright Wolf-Rayet binary $\gamma^2$ Velorum, obtained over six months with the nanosatellites in the BRITE- Constellation fleet. In parallel, we obtained 488 high-resolution optical spec
Externí odkaz:
http://arxiv.org/abs/1707.03390
Autor:
Pablo, Herbert, Richardson, Noel D., Moffat, Anthony F. J., Corcoran, Michael, Shenar, Tomer, Benvenuto, Omar, Fuller, Jim, Naze, Yael, Hoffman, Jennifer L., Miroshnichenko, Anatoly, Apellaniz, Jesus Maiz, Evans, Nancy, Eversberg, Thomas, Gayley, Ken, Gull, Ted, Hamaguch, Kenji, Hamann, Wolf-Rainer, Henrichs, Huib, Hole, Tabetha, Ignace, Richard, Iping, Rosina, Lauer, Jennifer, Leutenegger, Maurice, Lomax, Jamie, Nichols, Joy, Oskinova, Lida, Owocki, Stan, Pollock, Andy, Russell, Christopher M. P., Waldron, Wayne, Buil, Christian, Garrel, Thierry, Graham, Keith, Heathcote, Bernard, Lemoult, Thierry, Li, Dong, Mauclaire, Benjamin, Potter, Mike, Ribeiro, Jose, Matthews, Jaymie, Cameron, Chris, Guenther, David, Kuschnig, Rainer, Rowe, Jason, Rucinski, Slavek, Sasselov, Dimitar, Weiss, Werner
Publikováno v:
ApJ, 809, 134 (11p,2015)
We report on both high-precision photometry from the MOST space telescope and ground-based spectroscopy of the triple system delta Ori A consisting of a binary O9.5II+early-B (Aa1 and Aa2) with P = 5.7d, and a more distant tertiary (O9 IV P > 400 yrs
Externí odkaz:
http://arxiv.org/abs/1504.08002
Autor:
Huenemoerder, David P., Oskinova, Lidia M., Ignace, Richard, Waldron, Wayne L., Todt, Helge, Hamaguchi, Kenji, Kitamoto, Shunji
\mu\ Columbae is a prototypical weak-wind O-star for which we have obtained a high-resolution X-ray spectrum with the Chandra LETG/ACIS-S instrument and a low resolution spectrum with Suzaku. This allows us, for the first time, to investigate the rol
Externí odkaz:
http://arxiv.org/abs/1208.0820
Autor:
Townsley, Leisa K., Broos, Patrick S., Corcoran, Michael F., Feigelson, Eric D., Gagné, Marc, Montmerle, Thierry, Oey, M. S., Smith, Nathan, Garmire, Gordon P., Getman, Konstantin V., Povich, Matthew S., Evans, Nancy Remage, Nazé, Yaël, Parkin, E. R., Preibisch, Thomas, Wang, Junfeng, Wolk, Scott J., Chu, You-Hua, Cohen, David H., Gruendl, Robert A., Hamaguchi, Kenji, King, Robert R., Mac Low, Mordecai-Mark, McCaughrean, Mark J., Moffat, Anthony F. J., Oskinova, L. M., Pittard, Julian M., Stassun, Keivan G., ud-Doula, Asif, Walborn, Nolan R., Waldron, Wayne L., Churchwell, Ed, Nichols, J. S., Owocki, Stanley P., Schulz, N. S.
Publikováno v:
ApJS, 194, 1 (28p, 2011)
The Great Nebula in Carina provides an exceptional view into the violent massive star formation and feedback that typifies giant HII regions and starburst galaxies. We have mapped the Carina star-forming complex in X-rays, using archival Chandra data
Externí odkaz:
http://arxiv.org/abs/1102.4779
A controversy has developed regarding the stellar wind mass loss rates in O-stars. The current consensus is that these winds may be clumped which implies that all previously derived mass loss rates using density-squared diagnostics are overestimated
Externí odkaz:
http://arxiv.org/abs/1001.4512
Publikováno v:
Astrophysical Journal 703 (2009) 633-641; http://stacks.iop.org/0004-637X/703/633
Marked correlations are reported between the ionization of the X-ray line spectra of normal OB stars, as observed by the Chandra X-Ray Observatory, and their optical spectral types. These correlations include the progressive weakening of the higher i
Externí odkaz:
http://arxiv.org/abs/0907.4738
The observed X-ray source temperature distributions in OB stellar winds, as determined from high energy resolution Chandra observations, show that the highest temperatures occur near the star, and then steadily decrease outward through the wind. To e
Externí odkaz:
http://arxiv.org/abs/0901.1405