Zobrazeno 1 - 10
of 186
pro vyhledávání: '"Schaffenroth, V."'
Autor:
Geier, S., Heber, U., Irrgang, A., Dorsch, M., Bastian, A., Neunteufel, P., Kupfer, T., Bloemen, S., Kreuzer, S., Möller, L., Schindewolf, M., Schneider, D., Ziegerer, E., Pelisoli, I., Schaffenroth, V., Barlow, B. N., Raddi, R., Geier, S. J., Reindl, N., Rauch, T., Nemeth, P., Gänsicke, B. T.
Hot subdwarfs (sdO/B) are the stripped helium cores of red giants formed by binary interactions. Close hot subdwarf binaries with massive white dwarf companions have been proposed as possible progenitors of thermonuclear supernovae type Ia (SN Ia). I
Externí odkaz:
http://arxiv.org/abs/2407.04479
Autor:
Groot, Paul J., Bloemen, S., Vreeswijk, P., van Roestel, J., Jonker, P. G., Nelemans, G., Klein-Wolt, M., Poole, R. Le, Pieterse, D., Rodenhuis, M., Boland, W., Haverkorn, M., Aerts, C., Bakker, R., Balster, H., Bekema, M., Dijkstra, E., Dolron, P., Elswijk, E., van Elteren, A., Engels, A., Fokker, M., de Haan, M., Hahn, F., ter Horst, R., Lesman, D., Kragt, J., Morren, J., Nillissen, H., Pessemier, W., de Rijke, A, Raskin, G., Scheers, L. H. A., Schuil, M., Timmer, S. T., Arcavi, I., Blagorodnova, N., Biswas, S., Breton, R., Dawson, H., Dayal, P., De Wet, S., Duffy, C., Faris, S., Fausnaugh, M., Gal-Yam, A., Geier, S., Horesh, A., Johnston, C., Wijnands, R. A. D., Modiano, D., Katusiime, G., Kelley, C., Kosakowski, A., Kupfer, T., Leloudas, G., Mogawana, O., Munday, J., Paice, J. A., Patat, F., Pelisoli, I., Ramsay, G., Ranaivomanana, P. T., Ruiz-Carmona, R., Schaffenroth, V., Scaringi, S., Stoppa, F., Tranin, H., Uzundag, M., Valenti, S., Veresvarska, M., Wichern, H. C. I., Wijers, R. A. M. J., Zimmerman, E.
The main science aim of the BlackGEM array is to detect optical counterparts to gravitational wave mergers. Additionally, the array will perform a set of synoptic surveys to detect Local Universe transients and short time-scale variability in stars a
Externí odkaz:
http://arxiv.org/abs/2405.18923
Autor:
Dawson, H., Geier, S., Heber, U., Pelisoli, I., Dorsch, M., Schaffenroth, V., Reindl, N., Culpan, R., Pritzkuleit, M., Vos, J., Soemitro, A. A., Roth, M. M., Schneider, D., Uzundag, M., Vučković, M., Amaral, L. Antunes, Istrate, A. G., Justham, S., Østensen, R. H., Telting, J. H., Djupvik, A. A., Raddi, R., Green, E. M., Jeffery, C. S., Kepler, S. O., Munday, J., Steinmetz, T., Kupfer, T.
We present the first volume-limited sample of spectroscopically confirmed hot subluminous stars out to 500 pc, defined using the accurate parallax measurements from the {\em Gaia} space mission data release 3 (DR3). The sample comprises a total of 39
Externí odkaz:
http://arxiv.org/abs/2403.15513
Autor:
Geier, S., Dorsch, M., Dawson, H., Pelisoli, I., Munday, J., Marsh, T. R., Schaffenroth, V., Heber, U.
Publikováno v:
A&A 677, A11 (2023)
We report the discovery of the first hot subdwarf B (sdB) star with a massive compact companion in a wide ($P=892.5\pm60.2\,{\rm d}$) binary system. It was discovered based on an astrometric binary solution provided by the Gaia mission Data Release 3
Externí odkaz:
http://arxiv.org/abs/2305.03475
Publikováno v:
A&A 673, A90 (2023)
Hot subdwarfs in close binaries with either M dwarf, brown dwarf or white dwarf companions show unique light variations. In hot subdwarf binaries with M dwarf or brown dwarf companions we can observe the so-called reflection effect and in hot subdwar
Externí odkaz:
http://arxiv.org/abs/2302.12507
Publikováno v:
A&A 666, A182 (2022)
About a third of the hot subdwarfs of spectral type B, which are mostly core-helium burning objects on the extreme horizontal branch, are found in close binaries with cool, low-mass stellar, substellar, or white dwarf companions. They can show light
Externí odkaz:
http://arxiv.org/abs/2207.02001
Autor:
Pelisoli, Ingrid, Dorsch, M., Heber, U., Gänsicke, B., Geier, S., Kupfer, T., Németh, P., Scaringi, S., Schaffenroth, V.
Magnetic fields can play an important role in stellar evolution. Among white dwarfs, the most common stellar remnant, the fraction of magnetic systems is more than 20 per cent. The origin of magnetic fields in white dwarfs, which show strengths rangi
Externí odkaz:
http://arxiv.org/abs/2204.06575
Autor:
Pelisoli, Ingrid, Neunteufel, P., Geier, S., Kupfer, T., Heber, U., Irrgang, A., Schneider, D., Bastian, A., van Roestel, J., Schaffenroth, V., Barlow, B. N.
Supernova Ia are bright explosive events that can be used to estimate cosmological distances, allowing us to study the expansion of the Universe. They are understood to result from a thermonuclear detonation in a white dwarf that formed from the exha
Externí odkaz:
http://arxiv.org/abs/2107.09074
Autor:
Mereghetti, S., Pintore, F., Rauch, T., La Palombara, N., Esposito, P., Geier, S., Pelisoli, I., Rigoselli, M., Schaffenroth, V., Tiengo, A.
HD49798 / RXJ0648.0-4418 is the only confirmed X-ray binary in which the mass donor is a hot subdwarf star of O spectral type and, most likely, it contains a massive white dwarf (1.28$\pm$0.05 M$_{\rm SUN}$) with a very fast spin period of 13.2 s. He
Externí odkaz:
http://arxiv.org/abs/2104.03867
Autor:
Schaffenroth, V., Casewell, S. L., Schneider, D., Kilkenny, D., Geier, S., Heber, U., Irrgang, A., Przybilla, N., Marsh, T. R., Littlefair, S. P., Dhillon, V. S.
Subdwarf B stars are core-helium burning stars located on the extreme horizontal branch. Extensive mass loss on the red giant branch is necessary to form them. It has been proposed that substellar companions could lead to the required mass-loss when
Externí odkaz:
http://arxiv.org/abs/2011.10013