Zobrazeno 1 - 10
of 1 852
pro vyhledávání: '"ZUCKERMAN, B."'
Autor:
O'Brien, Mairi W., Tremblay, P. -E., Klein, B. L., Koester, D., Melis, C., Bédard, A., Cukanovaite, E., Cunningham, T., Doyle, A. E., Gänsicke, B. T., Fusillo, N. P. Gentile, Hollands, M. A., McCleery, J., Pelisoli, I., Toonen, S., Weinberger, A. J., Zuckerman, B.
Publikováno v:
MNRAS 527, 3 (2024) 8687-8705
We present a comprehensive overview of a volume-complete sample of white dwarfs located within 40 pc of the Sun, a significant proportion of which were detected in Gaia Data Release 3 (DR3). Our DR3 sample contains 1076 spectroscopically confirmed wh
Externí odkaz:
http://arxiv.org/abs/2312.02735
Autor:
Rogers, L. K., Bonsor, A., Xu, S., Dufour, P., Klein, B. L., Buchan, A., Hodgkin, S., Hardy, F., Kissler-Patig, M., Melis, C., Weinberger, A. J., Zuckerman, B.
Observations of planetary material polluting the atmospheres of white dwarfs are an important probe of the bulk composition of exoplanetary material. Medium- and high-resolution optical and ultraviolet spectroscopy of seven white dwarfs with known ci
Externí odkaz:
http://arxiv.org/abs/2311.14048
Autor:
Vennes, Stephane, Kawka, Adela, Klein, Beth L., Zuckerman, B., Weinberger, Alycia J., Melis, Carl
We present an analysis of spectroscopic data of the cool, highly magnetic and polluted white dwarf 2MASS J0916-4215. The atmosphere of the white dwarf is dominated by hydrogen, but numerous spectral lines of magnesium, calcium, titanium, chromium, ir
Externí odkaz:
http://arxiv.org/abs/2311.07937
Autor:
Farihi, J., Koester, D., Zuckerman, B., Vican, L., Gänsicke, B. T., Smith, N., Walth, G., Breedt, E.
The T-eff = 20 800 K white dwarf WD 1536+520 is shown to have broadly solar abundances of the major rock-forming elements O, Mg, Al, Si, Ca, and Fe, together with a strong relative depletion in the volatile elements C and S. In addition to the highes
Externí odkaz:
http://hdl.handle.net/10150/622949
http://arizona.openrepository.com/arizona/handle/10150/622949
http://arizona.openrepository.com/arizona/handle/10150/622949
Autor:
Galicher, R., Marois, C., Macintosh, B., Zuckerman, B., Barman, T., Konopacky, Q., Song, I., Patience, J., Lafrenière, D., Doyon, R., Nielsen, E. L.
Context. Radial velocity and transit methods are effective for the study of short orbital period exoplanets but they hardly probe objects at large separations for which direct imaging can be used. Aims. We carried out the international deep planet su
Externí odkaz:
http://hdl.handle.net/10150/622797
http://arizona.openrepository.com/arizona/handle/10150/622797
http://arizona.openrepository.com/arizona/handle/10150/622797
Autor:
Marino, S., Matrà, L., Stark, C., Wyatt, M. C., Casassus, S., Kennedy, G., Rodriguez, D., Zuckerman, B., Perez, S., Dent, W. R. F., Kuchner, M., Hughes, A. M., Schneider, G., Steele, A., Roberge, A., Donaldson, J., Nesvold, E.
An increasing number of observations have shown that gaseous debris discs are not an exception. However, until now, we only knew of cases around A stars. Here we present the first detection of (CO)-C-12 (2-1) disc emission around an F star, HD 181327
Externí odkaz:
http://hdl.handle.net/10150/621723
http://arizona.openrepository.com/arizona/handle/10150/621723
http://arizona.openrepository.com/arizona/handle/10150/621723
Autor:
Konopacky, Q. M., Marois, C., Macintosh, B. A., Galicher, R., Barman, T. S., Metchev, S. A., Zuckerman, B.
We present new astrometric measurements from our ongoing monitoring campaign of the HR 8799 directly imaged planetary system. These new data points were obtained with NIRC2 on the W.M. Keck II 10 m telescope between 2009 and 2014. In addition, we pre
Externí odkaz:
http://hdl.handle.net/10150/621227
http://arizona.openrepository.com/arizona/handle/10150/621227
http://arizona.openrepository.com/arizona/handle/10150/621227
Autor:
Owens, Dylan, Xu, Siyi, Manjavacas, Elena, Leggett, S. K., Casewell, S. L., Dennihy, Erik, Dufour, Patrick, Klein, Beth L., Yeh, Sherry, Zuckerman, B.
Excess infrared flux from white dwarf stars is likely to arise from a dusty debris disk or a cool companion. In this work, we present near-infrared spectroscopic observations with Keck/MOSFIRE, Gemini/GNIRS, and Gemini/Flamingos-2 of seven white dwar
Externí odkaz:
http://arxiv.org/abs/2303.16330
Autor:
Doyle, Alexandra E., Klein, Beth L., Dufour, Patrick, Melis, Carl, Zuckerman, B., Xu, Siyi, Weinberger, Alycia J., Trierweiler, Isabella L., Monson, Nathaniel N., Jura, Michael A., Young, Edward D.
We present observations and analyses of eight white dwarf stars that have accreted rocky material from their surrounding planetary systems. The spectra of these helium-atmosphere white dwarfs contain detectable optical lines of all four major rock-fo
Externí odkaz:
http://arxiv.org/abs/2303.00063
Ultraviolet and optical spectra of the hydrogen-dominated atmosphere white dwarf star G238-44 obtained with FUSE, Keck/HIRES, HST/COS, and HST/STIS reveal ten elements heavier than helium: C, N, O, Mg, Al, Si, P, S, Ca, and Fe. G238-44 is only the th
Externí odkaz:
http://arxiv.org/abs/2211.02673