Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Bjorkman, Karen S."'
Autor:
Richardson, Noel D., Thizy, Olivier, Bjorkman, Jon E., Carciofi, Alex, Rubio, Amanda C., Thomas, Joshua D., Bjorkman, Karen S., Labadie-Bartz, Jonathan, Genaro, Matheus, Wisniewski, John P., Wang, Luqian, Gies, Douglas R., Chojnowski, S. Drew, Daly, Andrea, Edwards, Thompson, Fowler, Carlie, Gullingsrud, Allison D., Habel, Nolan, James, David J., Kehoe, Emily, Kuchta, Heidi, Lane, Alexis, Miroshnichenko, Anatoly, Mishra, Ashish, Pablo, Herbert, Peploski, Maurice, Pepper, Joshua, Rodriguez, Joseph E., Siverd, Robert J., Stassun, Keivan G., Stevens, Daniel J., Trucks, Jesica L., Windsor, James, Wood, Mackenna, Bertrand, Étienne, Broussat, Jean-Jacques, Bryssinck, Erik, Buil, Christian, Charbonnel, Stéphane, de Bruin, Arnold, Daglen, Joe, Desnoux, Valerie, Dull, James, Garde, Olivier, Graham, Keith, Gurney, Kevin, Halsey, Alun, Fosanelli, Patrik, Fló, Joan Guarro, Houpert, Franck, James, Foster, Kreider, Christian, Leadbeater, Robin, Lester, Tim, Li, Dong, Maetz, Alain, Stiewing, Albert, Somogyi, Peter, Terry, Jean-Noël, Ubaud, Stéphane, Waldschlaeger, Ulrich
The bright and understudied classical Be star HD 6226 has exhibited multiple outbursts in the last several years during which the star grew a viscous decretion disk. We analyze 659 optical spectra of the system collected from 2017-2020, along with a
Externí odkaz:
http://arxiv.org/abs/2109.11026
Autor:
Lomax, Jamie R., Fullard, Andrew G., Malatesta, Michael A., Babler, Brian, Bednarski, Daniel, Berdis, Jodi R., Bjorkman, Karen S., Bjorkman, Jon E., Carciofi, Alex C., Davidson Jr., James W., Keil, Marcus, Meade, Marilyn R., Nordsieck, Kenneth, Scheffler, Matt, Hoffman, Jennifer L., Wisniewski, John P.
We analyze 45 spectropolarimetric observations of the eclipsing, interacting binary star V356 Sgr, obtained over a period of 21 years, to characterize the geometry of the system's circumstellar material. After removing interstellar polarization from
Externí odkaz:
http://arxiv.org/abs/1609.07489
Autor:
Horch, Elliott P., van Belle, Gerard T., Davidson, Jr., James W., Ciastko, Lindsay A., Everett, Mark E., Bjorkman, Karen S.
We present the results of 938 speckle measures of double stars and suspected double stars drawn mainly from the Hipparcos Catalogue, as well as 208 observations where no companion was noted. One hundred fourteen pairs have been resolved for the first
Externí odkaz:
http://arxiv.org/abs/1509.03498
Autor:
Draper, Zachary H., Wisniewski, John P., Bjorkman, Karen S., Meade, Marilyn R., Haubois, Xavier, Mota, Bruno C., Carciofi, Alex C., Bjorkman, Jon E.
Recent observational and theoretical studies of classical Be stars have established the utility of polarization color diagrams (PCD) in helping to constrain the time-dependent mass decretion rates of these systems. We expand on our pilot observationa
Externí odkaz:
http://arxiv.org/abs/1402.5240
We present near-IR (J,H,Ks) photometry for 27 of the 28 candidate Herbig Ae/Be stars in the Small and Large Magellanic Clouds identified via the EROS1 and EROS2 surveys as well as near-contemporaneous optical (H-alpha) spectroscopy for 21 of these 28
Externí odkaz:
http://arxiv.org/abs/1105.5631
Autor:
Draper, Zachary H., Wisniewski, John P., Bjorkman, Karen S., Haubois, Xavier, Carciofi, Alex C., Bjorkman, Jon E., Meade, Marilyn R., Okazaki, Atsuo
We analyze the intrinsic polarization of two classical Be stars in the process of losing their circumstellar disks via a Be to normal B star transition originally reported by Wisniewski et al. During each of five polarimetric outbursts which interrup
Externí odkaz:
http://arxiv.org/abs/1101.3571
Autor:
Draper, Zachary H., Wisniewski, John P., Bjorkman, Karen S., Bjorkman, Jon E., Haubois, Xavier, Carciofi, Alex C., Meade, Marilyn R.
In Wisniewski et al. 2010, paper I, we analyzed 15 years of spectroscopic and spectropolarimetric data from the Ritter and Pine Bluff Observatories of 2 Be stars, 60 Cygni and {\pi} Aquarii, when a transition from Be to B star occurred. Here we anayl
Externí odkaz:
http://arxiv.org/abs/1101.2906
Autor:
Wisniewski, John P., Draper, Zachary H., Bjorkman, Karen S., Meade, Marilyn R., Bjorkman, Jon E., Kowalski, Adam F.
Publikováno v:
Astrophys.J.709:1306-1320,2010
(Abridged) Classical Be stars occasionally transition from having a gaseous circumstellar disk (''Be phase'') to a state in which all observational evidence for the presence of these disks disappears (''normal B-star phase''). We present one of the m
Externí odkaz:
http://arxiv.org/abs/0912.1504
We report high spatial resolution 11.2 and 18.1 micron imaging of the eruptive variable V838 Monocerotis, obtained with Gemini Observatory's Michelle in 2007 March. The 2007 flux density of the unresolved stellar core is roughly 2 times brighter than
Externí odkaz:
http://arxiv.org/abs/0809.5260
We report high spatial resolution 11.2 and 18.1 micron imaging of V838 Monocerotis obtained with Gemini Observatory's Michelle instrument in 2007 March. Strong emission is observed from the unresolved stellar core of V838 Mon in our Gemini imagery, a
Externí odkaz:
http://arxiv.org/abs/0807.1763