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Akademický článek
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Autor:
He, Yuji, Yuan, Hailong, Bai, Zhongrui, Yang, Mingkuan, Wang, Mengxin, Dong, Yiqiao, Huang, Xin, Zhou, Ming, Liu, Qian, Yang, Xiaozhen, Li, Ganyu, Jiang, Ziyue, Zhang, Haotong
We report the analysis of the detached eclipsing spectroscopic binary system LAMOST J101356.33+272410.7, which features a massive white dwarf. Using LAMOST and SDSS spectra, we determined the stellar parameters and radial velocities of both component
Externí odkaz:
http://arxiv.org/abs/2501.01171
Autor:
Kilic, Mukremin, Bergeron, Pierre, Blouin, Simon, Moss, Adam, Brown, Warren R., Bedard, Antoine, Jewett, Gracyn, Agueros, Marcel A.
We increase the spectroscopic completeness of the 100 pc white dwarf sample in the SDSS footprint with 840 additional spectra. Our spectroscopy is 86% complete for white dwarfs hotter than $T_{\rm eff}= 5000$ K, where H$\alpha$ remains visible and pr
Externí odkaz:
http://arxiv.org/abs/2412.04611
Autor:
Rajamuthukumar, Abinaya Swaruba, Bauer, Evan B., Justham, Stephen, Pakmor, Rüdiger, de Mink, Selma E., Neunteufel, Patrick
Compact binaries containing hot subdwarfs and white dwarfs have the potential to evolve into a variety of explosive transients. These systems could also explain hypervelocity runaway stars such as US 708. We use the detailed binary evolution code MES
Externí odkaz:
http://arxiv.org/abs/2411.08099
Autor:
Marcano, Manuel Pichardo, Sandoval, Liliana E. Rivera, Maccarone, Thomas J., Rohrmann, Rene D., Althaus, Leandro G., Heinke, Craig O., Belloni, Diogo, Bahramian, Arash
Using archival Hubble Space Telescope observations, we report the discovery of four variable low-mass white dwarfs ($0.18 \, M_\odot \leq M \leq 0.5 \,M_\odot$) in the globular cluster NGC 6397. One source exhibits a periodic optical modulation of $5
Externí odkaz:
http://arxiv.org/abs/2412.12375
Autor:
Camisassa, Maria
Publikováno v:
Astronomische Nachrichten published by Wiley-VCH GmbH. Proceedings of the XMM-Newton 2024 Science Workshop "The X-ray mysteries of neutron stars and white dwarfs". Published on 28 November 2024 (open access)
White dwarf stars are the most common endpoint of stellar evolution. Therefore, these old, numerous and compact objects provide valuable information on the late stages of stellar evolution, the physics of dense plasma and the structure and evolution
Externí odkaz:
http://arxiv.org/abs/2412.06516
Autor:
Mereghetti, Sandro
I review the properties and discuss some of the puzzling aspects of the unique binary system composed of the luminous hot subdwarf HD 49798 and a white dwarf with mass of 1.2 solar masses and spin period of 13.2 s. This is one of the few massive whit
Externí odkaz:
http://arxiv.org/abs/2412.18546
Extremely low-mass white dwarfs (ELM WDs) are helium-core white dwarfs with masses less than 0.3 $M_{\odot}$. Short-period ELM WD binaries that exhibit ellipsoidal variations may harbor heavier companions, either massive white dwarfs or millisecond p
Externí odkaz:
http://arxiv.org/abs/2412.17447
Autor:
van Roestel, J., Rodriguez, A. C., Szkody, P., Brown, A. J., Caiazzo, I., Drake, A., El-Badry, K., Prince, T., Rich, R. M. R., Neill, J. D., Vanderbosch, Z., Bellm, E. C., Dekany, R., Feinstein, F., Graham, M., Groom, S. L., Helou, G., Kulkarni, S. R., Laz, T. du, Mahabal, A., Sharma, Y., Sollerman, J., Wold, A.
We present the discovery of 14 new (and recovery of 4 known) low accretion rate magnetic white dwarfs in post-common envelope binaries that emit strong cyclotron emission using the Zwicky Transient Facility (ZTF) light curves, doubling the known samp
Externí odkaz:
http://arxiv.org/abs/2412.15153
Autor:
Crumpler, Nicole R., Chandra, Vedant, Zakamska, Nadia L., Pallathadka, Gautham Adamane, Arseneau, Stefan, Fusillo, Nicola Gentile, Hermes, J. J., Badenes, Carles, Chakraborty, Priyanka, Gänsicke, Boris T., Schmidt, Stephen P.
Publikováno v:
ApJ 977 237 (2024)
Models predict that the well-studied mass-radius relation of white dwarf stars depends on the temperature of the star, with hotter white dwarfs having larger masses at a given radius than cooler stars. In this paper, we use a catalog of 26,041 DA whi
Externí odkaz:
http://arxiv.org/abs/2412.14331