Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Ziegerer E"'
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.
Publikováno v:
A&A 690, A368 (2024)
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:
Schaffenroth, V., Barlow, B. N., Geier, S., Vu{č}ković, M., Kilkenny, D., Wolz, M., Kupfer, T., Heber, U., Drechsel, H., Kimeswenger, S., Marsh, T., Wolf, M., Pelisoli, I., Freudenthal, J., Dreizler, S., Kreuzer, S., Ziegerer, E.
Publikováno v:
A&A 630, A80 (2019)
Eclipsing post-common envelope binaries are highly important for resolving the poorly understood, very short-lived common envelope phase. Most hot subdwarfs (sdO/Bs) are the bare He-burning cores of red giants which have lost almost all of their hydr
Externí odkaz:
http://arxiv.org/abs/1907.09892
Publikováno v:
A&A 614, A77 (2018)
Hot subdwarfs (sdO/Bs) are the helium-burning cores of red giants, which lost almost all of their hydrogen envelopes. This mass loss is often triggered by common envelope interactions with close stellar or even substellar companions. Cool companions
Externí odkaz:
http://arxiv.org/abs/1802.03260
Publikováno v:
A&A 601, A58 (2017)
Important tracers for the dark matter halo of the Galaxy are hypervelocity stars (HVSs), which are faster than the local escape velocity of the Galaxy and their slower counterparts, the high-velocity stars in the Galactic halo. Such HVSs are believed
Externí odkaz:
http://arxiv.org/abs/1703.10455
Autor:
Geier, S., Kupfer, T., Heber, U., Nemeth, P., Ziegerer, E., Irrgang, A., Schindewolf, M., Marsh, T. R., Gänsicke, B. T., Barlow, B. N., Bloemen, S.
Hot subdwarf stars (sdO/Bs) are evolved core helium-burning stars with very thin hydrogen envelopes, which can be formed by common envelope ejection. Close sdB binaries with massive white dwarf (WD) companions are potential progenitors of thermonucle
Externí odkaz:
http://arxiv.org/abs/1612.03135
Hot subdwarf stars (sdO/Bs) are evolved core helium-burning stars with very thin hydrogen envelopes, which can be formed by common envelope ejection. Close sdB binaries with massive white dwarf (WD) companions are potential progenitors of thermonucle
Externí odkaz:
http://arxiv.org/abs/1604.05469
Publikováno v:
A&A 576, L14 (2015)
Hypervelocity stars (HVS) move so fast that they are unbound to the Galaxy. When they were first discovered in 2005, dynamical ejection from the supermassive black hole (SMBH) in the Galactic Centre (GC) was suggested as their origin. The two dozen H
Externí odkaz:
http://arxiv.org/abs/1503.04164
Autor:
Geier, S., Fürst, F., Ziegerer, E., Kupfer, T., Heber, U., Irrgang, A., Wang, B., Liu, Z., Han, Z., Sesar, B., Levitan, D., Kotak, R., Magnier, E., Smith, K., Burgett, W. S., Chambers, K., Flewelling, H., Kaiser, N., Wainscoat, R., Waters, C.
Publikováno v:
Science 347, S. 1126-1128, 2015
Hypervelocity stars (HVS) travel with velocities so high, that they exceed the escape velocity of the Galaxy. Several acceleration mechanisms have been discussed. Only one HVS (US 708, HVS 2) is a compact helium star. Here we present a spectroscopic
Externí odkaz:
http://arxiv.org/abs/1503.01650
Publikováno v:
A&A 576, A65 (2015)
The intermediate Helium subdwarf B star LS IV$-$14$^\circ$116 is a unique object showing extremely peculiar atmospheric abundances as well as long-period pulsations that cannot be explained in terms of the usual opacity mechanism. One hypothesis invo
Externí odkaz:
http://arxiv.org/abs/1502.05520
Autor:
Geier, S., Kupfer, T., Heber, U., Schaffenroth, V., Barlow, B. N., stensen, R. H. O, O'Toole, S. J., Ziegerer, E., Heuser, C., Maxted, P. F. L., Gänsicke, B. T., Marsh, T. R., Napiwotzki, R., Brünner, P., Schindewolf, M., Niederhofer, F.
The project Massive Unseen Companions to Hot Faint Underluminous Stars from SDSS (MUCHFUSS) aims to find sdBs with compact companions like massive white dwarfs, neutron stars or black holes. Here we provide classifications, atmospheric parameters and
Externí odkaz:
http://arxiv.org/abs/1502.04086