Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Vanderbosch, Z."'
The distribution of white dwarf rotation periods provides a means for constraining angular momentum evolution during the late stages of stellar evolution, as well as insight into the physics and remnants of double degenerate mergers. Although the rot
Externí odkaz:
http://arxiv.org/abs/2207.13763
Autor:
Casewell, S. L., Belardi, C., Parsons, S. G., Littlefair, S. P., Braker, I. P., Hermes, J. J., Debes, J., Vanderbosch, Z., Burleigh, M. R., Gaensicke, B. T., Dhillon, V. S., Marsh, T. R., Winget, D. E., Winget, K. I.
We present the discovery of only the third brown dwarf known to eclipse a non-accreting white dwarf. Gaia parallax information and multi-colour photometry confirm that the white dwarf is cool (9950$\pm$150K) and has a low mass (0.45$\pm$0.05~MSun), a
Externí odkaz:
http://arxiv.org/abs/2006.09417
Autor:
Reding, Joshua S., Hermes, J. J., Vanderbosch, Z., Dennihy, E., Kaiser, B. C., Mace, C. B., Dunlap, B. H., Clemens, J. C.
Publikováno v:
ApJ 2020, 894, 19
We report the discovery of short-period photometric variability and modulated Zeeman-split hydrogen emission in SDSSJ125230.93-023417.72 (EPIC 228939929), a variable white dwarf star observed at long cadence in \textit{K2} Campaign 10. The behavior i
Externí odkaz:
http://arxiv.org/abs/2003.10450
G183$-$35 is an unusual white dwarf that shows an H$\alpha$ line split into five components, instead of the usual three components seen in strongly magnetic white dwarfs. Potential explanations for the unusual set of lines includes a double degenerat
Externí odkaz:
http://arxiv.org/abs/1908.10915
Autor:
Vanderbosch, Z., Hermes, J. J., Dennihy, E., Dunlap, B. H., Izquierdo, P., Tremblay, P. E., Cho, P. B., Gaensicke, B. T., Toloza, O., Bell, K. J., Montgomery, M. H., Winget, D. E.
Publikováno v:
ApJ 2020, 897, 171
We report the discovery of a white dwarf exhibiting deep, irregularly shaped transits, indicative of circumstellar planetary debris. Using Zwicky Transient Facility DR2 photometry of ZTF$\,$J013906.17+524536.89 and follow-up observations from the Las
Externí odkaz:
http://arxiv.org/abs/1908.09839
Autor:
Bell, Keaton J., Pelisoli, Ingrid, Kepler, S. O., Brown, W. R., Winget, D. E., Winget, K. I., Vanderbosch, Z., Castanheira, B. G., Hermes, J. J., Montgomery, M. H., Koester, D.
Publikováno v:
A&A 617, A6 (2018)
Context. The nature of the recently identified "sdA" spectroscopic class of star is not well understood. The thousands of known sdAs have H-dominated spectra, spectroscopic surface gravities intermediate to main sequence stars and isolated white dwar
Externí odkaz:
http://arxiv.org/abs/1805.11129
Autor:
Bell, Keaton J., Hermes, J. J., Vanderbosch, Z., Montgomery, M. H., Winget, D. E., Dennihy, E., Fuchs, J. T., Tremblay, P. -E.
With typical periods of order 10 minutes, the pulsation signatures of ZZ Ceti variables (pulsating hydrogen-atmosphere white dwarf stars) are severely undersampled by long-cadence (29.42 minutes per exposure) K2 observations. Nyquist aliasing renders
Externí odkaz:
http://arxiv.org/abs/1710.10273
Autor:
Bell, Keaton J., Gianninas, A., Hermes, J. J., Winget, D. E., Kilic, Mukremin, Montgomery, M. H., Castanheira, B. G., Vanderbosch, Z., Winget, K. I., Brown, Warren R.
We assess the photometric variability of nine stars with spectroscopic Teff and log(g) values from the ELM Survey that locate them near the empirical extremely low-mass (ELM) white dwarf instability strip. We discover three new pulsating stars: SDSS
Externí odkaz:
http://arxiv.org/abs/1612.06390
Autor:
Greiss, S., Hermes, J. J., Gaensicke, B. T., Steeghs, D. T. H., Bell, Keaton J., Raddi, R., Tremblay, P. -E., Breedt, E., Ramsay, G., Koester, D., Carter, P. J., Vanderbosch, Z., Winget, D. E., Winget, K. I.
We report the discovery of 42 white dwarfs in the original Kepler mission field, including nine new confirmed pulsating hydrogen-atmosphere white dwarfs (ZZ Ceti stars). Guided by the Kepler-INT Survey (KIS), we selected white dwarf candidates on the
Externí odkaz:
http://arxiv.org/abs/1601.01316
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