Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Grundstrom, E. D."'
Autor:
Mourard, D., Monnier, J. D., Meilland, A., Gies, D., Millour, F., Benisty, M., Che, X., Grundstrom, E. D., Ligi, R., Schaefer, G., Baron, F., Kraus, S., Zhao, M., Pedretti, E., Berio, P., Clausse, J. M., Nardetto, N., Perraut, K., Spang, A., Stee, P., Tallon-Bosc, I., McAlister, H., Brummelaar, T. ten, Ridgway, S. T., Sturmann, J., Sturmann, L., Turner, N., Farrington, C.
The rapidly rotating Be star phi Persei was spun up by mass and angular momentum transfer from a now stripped-down, hot subdwarf companion. Here we present the first high angular resolution images of phi Persei made possible by new capabilities in lo
Externí odkaz:
http://arxiv.org/abs/1503.03423
Autor:
Touhami, Y., Gies, D. R., Schaefer, G. H., McAlister, H. A., Ridgway, S. T., Richardson, N. D., Matson, R., Grundstrom, E. D., Brummelaar, T. A. ten, Goldfinger, P. J., Sturmann, L., Sturmann, J., Turner, N. H., Farrington, C.
We report on a high angular resolution survey of circumstellar disks around 24 northern sky Be stars. The K-band continuum survey was made using the CHARA Array long baseline interferometer (baselines of 30 to 331 m). The interferometric visibilities
Externí odkaz:
http://arxiv.org/abs/1302.6135
Autor:
Williams, S. J., Gies, D. R., Matson, R. A., Touhami, Y., Grundstrom, E. D., Huang, W., McSwain, M. V.
The emission-line Be star HD 215227 lies within the positional error circle of the newly identified gamma-ray source AGL J2241+4454. We present new blue spectra of the star, and we point out the morphological and variability similarities to other Be
Externí odkaz:
http://arxiv.org/abs/1009.4947
Autor:
Touhami, Y., Richardson, N. D., Gies, D. R., Schaefer, G. H., Boyajian, T. S., Williams, S. J., Grundstrom, E. D., McSwain, M. V., Clemens, D. P., Taylor, B.
We present spectrophotometric data from 0.4 to 4.2 microns for bright, northern sky, Be stars and several other types of massive stars. Our goal is to use these data with ongoing, high angular resolution, interferometric observations to model the den
Externí odkaz:
http://arxiv.org/abs/1003.5876
Autor:
Roberts, Mallory S. E., Brogan, C., Ransom, S., Lyutikov, M., Wilhelmi, E. de Oña, Djannati-Ataï, A., Terrier, R., Dougherty, S. M., Grundstrom, E. D., Hessels, J. W. T., Johnston, S., McSwain, M. V., Ray, P. S., Wood, K., Pooley, G. G., Weinstein, A.
Multi-wavelength studies at radio, infrared, optical, X-ray, and TeV wavelengths have discovered probable counterparts to many Galactic sources of GeV emission detected by EGRET. These include pulsar wind nebulae, high mass X-ray binaries, and mixed
Externí odkaz:
http://arxiv.org/abs/0811.0570
Autor:
Gies, D. R., Dieterich, S., Richardson, N. D., Riedel, A. R., Team, B. L., McAlister, H. A., Bagnuolo, Jr., W. G., Grundstrom, E. D., Stefl, S., Rivinius, Th., Baade, D.
We present a radial velocity study of the rapidly rotating B-star Regulus that indicates the star is a single-lined spectroscopic binary. The orbital period (40.11 d) and probable semimajor axis (0.35 AU) are large enough that the system is not inter
Externí odkaz:
http://arxiv.org/abs/0806.3473
Autor:
Grundstrom, E. D., Gies, D. R., Hillwig, T. C., McSwain, M. V., Smith, N., Gehrz, R. D., Stahl, O., Kaufer, A.
Publikováno v:
Astrophys.J.667:505-519,2007
The massive interacting binary RY Scuti is an important representative of an active mass-transferring system that is changing before our eyes and which may be an example of the formation of a Wolf-Rayet star through tidal stripping. Utilizing new and
Externí odkaz:
http://arxiv.org/abs/0706.3206
Autor:
Boyajian, T. S., Gies, D. R., Baines, E. K., Barai, P., Grundstrom, E. D., McSwain, M. V., Parks, J. R., Riddle, R. L., Ryle, W. T., Wingert, D. W.
We present new results from a radial velocity study of six bright OB stars with little or no prior measurements. One of these, HD 45314, may be a long-period binary, but the velocity variations of this Be star may be related to changes in its circums
Externí odkaz:
http://arxiv.org/abs/0706.1221
Autor:
Boyajian, T. S., Gies, D. R., Dunn, J. P., Farrington, C. D., Grundstrom, E. D., Huang, W., McSwain, M. V., Williams, S. J., Wingert, D. W., Fullerton, A. W., Bolton, C. T.
Publikováno v:
Astrophys.J.664:1121-1129,2007
We present the results from an optical spectroscopic analysis of the massive stars HD 37366 and HD 54662. We find that HD 37366 is a double-lined spectroscopic binary with a period of 31.8187 +/- 0.0004 days, and HD 54662 is also a double lined binar
Externí odkaz:
http://arxiv.org/abs/0704.3229
Autor:
Grundstrom, E. D., Boyajian, T. S., Finch, C., Gies, D. R., Huang, W., McSwain, M. V., O'Brien, D. P., Riddle, R. L., Trippe, M. L., Williams, S. J., Wingert, D. W., Zaballa, R. A.
Publikováno v:
Astrophys.J.660:1398-1408,2007
We present results from an H-alpha monitoring campaign of the Be X-ray binary systems HDE 245770 = A 0535+26 and X Per. We use the H-alpha equivalent widths together with adopted values of the Be star effective temperature, disk inclination, and disk
Externí odkaz:
http://arxiv.org/abs/astro-ph/0702283