Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Roelofs, G. H. A."'
We present time-resolved spectroscopy of the AM CVn-type binaries GP Com and V396 Hya obtained with VLT/X-Shooter and VLT/UVES. We fully resolve the narrow central components of the dominant helium lines and determine radial velocity semi-amplitudes
Externí odkaz:
http://arxiv.org/abs/1601.02841
Autor:
Barentsen, Geert, Farnhill, H. J., Drew, J. E., González-Solares, E. A., Greimel, R., Irwin, M. J., Miszalski, B., Ruhland, C., Groot, P., Mampaso, A., Sale, S. E., Henden, A. A., Aungwerojwit, A., Barlow, M. J., Carter, P. J., Corradi, R. L. M., Drake, J. J., Eislöffel, J., Fabregat, J., Gänsicke, B. T., Fusillo, N. P. Gentile, Greiss, S., Hales, A. S., Hodgkin, S., Huckvale, L., Irwin, J., King, R., Knigge, C., Kupfer, T., Lagadec, E., Lennon, D. J., Lewis, J. R., Mohr-Smith, M., Morris, R. A. H., Naylor, T., Parker, Q. A., Phillipps, S., Pyrzas, S., Raddi, R., Roelofs, G. H. A., Rodríguez-Gil, P., Sabin, L., Scaringi, S., Steeghs, D., Suso, J., Tata, R., Unruh, Y. C., van Roestel, J., Viironen, K., Vink, J. S., Walton, N. A., Wright, N. J., Zijlstra, A. A.
The INT/WFC Photometric H-Alpha Survey of the Northern Galactic Plane (IPHAS) is a 1800 square degrees imaging survey covering Galactic latitudes |b| < 5 deg and longitudes l = 30 to 215 deg in the r, i and H-alpha filters using the Wide Field Camera
Externí odkaz:
http://arxiv.org/abs/1406.4862
Autor:
Carter, P. J., Steeghs, D., de Miguel, E., Goff, W., Koff, R. A., Krajci, T., Marsh, T. R., Gänsicke, B. T., Breedt, E., Groot, P. J., Nelemans, G., Roelofs, G. H. A., Rau, A., Koester, D., Kupfer, T.
Publikováno v:
2013MNRAS.431..372C
We present time-resolved spectroscopy and photometry of the dwarf nova SBSS 1108+574, obtained during the 2012 outburst. Its quiescent spectrum is unusually rich in helium, showing broad, double-peaked emission lines from the accretion disc. We measu
Externí odkaz:
http://arxiv.org/abs/1301.6761
Autor:
Carter, P. J., Marsh, T. R., Steeghs, D., Groot, P. J., Nelemans, G., Levitan, D., Rau, A., Copperwheat, C. M., Kupfer, T., Roelofs, G. H. A.
Publikováno v:
2013MNRAS.429.2143C
We present the latest results from a spectroscopic survey designed to uncover the hidden population of AM Canum Venaticorum (AM CVn) binaries in the photometric database of the Sloan Digital Sky Survey (SDSS). We selected ~2000 candidates based on th
Externí odkaz:
http://arxiv.org/abs/1211.6439
HM Cancri is a candidate ultracompact binary white dwarf with an apparent orbital period of only 5.4 minutes, as suggested by X-ray and optical light-curve modulations on that period, and by the absence of longer-period variability. In this Letter we
Externí odkaz:
http://arxiv.org/abs/1003.0658
Autor:
Woudt, P. A., Steeghs, D., Karovska, M., Warner, B., Groot, P. J., Nelemans, G., Roelofs, G. H. A., Marsh, T. R., Nagayama, T., Smits, D. P., O'Brien, T.
Publikováno v:
Astrophys.J.706:738-746,2009
From multi-epoch adaptive optics imaging and integral field unit spectroscopy we report the discovery of an expanding and narrowly confined bipolar shell surrounding the helium nova V445 Puppis (Nova Puppis 2000). An equatorial dust disc obscures the
Externí odkaz:
http://arxiv.org/abs/0910.1069
Autor:
Roelofs, G. H. A., Groot, P. J., Steeghs, D., Rau, A., de Groot, E., Marsh, T. R., Nelemans, G., Liebert, J., Woudt, P.
We describe a spectroscopic survey designed to uncover an estimated ~40 AM CVn stars hiding in the photometric database of the Sloan Digital Sky Survey (SDSS). We have constructed a relatively small sample of about 1500 candidates based on a colour s
Externí odkaz:
http://arxiv.org/abs/0811.3974
Autor:
Witham, A. R., Knigge, C., Aungwerojwit, A., Drew, J. E., Gaensicke, B. T., Greimel, R., Groot, P. J., Roelofs, G. H. A., Steeghs, D., Woudt, P. A.
We report the discovery of 11 new cataclysmic variable (CV) candidates by the Isaac Newton Telescope (INT) Photometric H alpha Survey of the northern Galactic plane (IPHAS). Three of the systems have been the subject of further follow-up observations
Externí odkaz:
http://arxiv.org/abs/0710.5163
The Sloan Digital Sky Survey has been instrumental in obtaining a homogeneous sample of the rare AM CVn stars: mass-transferring binary white dwarfs. As part of a campaign of spectroscopic follow-up on candidate AM CVn stars from the Sloan Digital Sk
Externí odkaz:
http://arxiv.org/abs/0709.2954
The AM Canum Venaticorum stars are rare interacting white dwarf binaries, whose formation and evolution are still poorly known. The Sloan Digital Sky Survey provides, for the first time, a sample of 6 AM CVn stars (out of a total population of 18) th
Externí odkaz:
http://arxiv.org/abs/0709.2951