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6 results on '"Wisniewski J"'

1. The magnetic early B-type Stars II: stellar atmospheric parameters in the era of Gaia

Author

Shultz, M. E., Wade, G. A., Rivinius, Th, Alecian, E., Neiner, Coralie, Petit, V., Wisniewski, J. P., Collaboration, the MiMeS, Collaboration, the BinaMIcS, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Magnetic measurements, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Type (model theory), magnetic fields, 01 natural sciences, Measure (mathematics), Spectral line, stars: rotation, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, Physics, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010308 nuclear & particles physics, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Astronomy and Astrophysics, stars: early-type, Magnetic field, stars: chemically peculiar, stars: massive, Stars, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Astrophysics::Earth and Planetary Astrophysics, Data release
Abstract

Atmospheric parameters determined via spectral modelling are unavailable for many of the known magnetic early B-type stars. We utilized high-resolution spectra together with NLTE models to measure effective temperatures $T_{\rm eff}$ and surface gravities $\log{g}$ of stars for which these measurements are not yet available. We find good agreement between our $T_{\rm eff}$ measurements and previous results obtained both photometrically and spectroscopically. For $\log{g}$, our results are compatible with previous spectroscopic measurements; however, surface gravities of stars previously determined photometrically have been substantially revised. We furthermore find that $\log{g}$ measurements obtained with HARPSpol are typically about 0.1 dex lower than those from comparable instruments. Luminosities were determined using Gaia Data Release 2 parallaxes. We find Gaia parallaxes to be unreliable for bright stars ($V, 21 pages, 3 tables, 15 figures, accepted for publication in MNRAS

Published
2019

2. Orbital characterization of GJ1108A system, and comparison of dynamical mass with model-derived mass for resolved binaries

Author

Mede, K., Schlieder, J. E., Janson, M., Brandt, T. D., Hirano, T., Narita, N., Wisniewski, J., Biller, B., Bonnefoy, M., Carson, J. C., McElwain, M. W., Turner, E. L., Mayama, S., Akiyama, E., Uyama, T., Kudo, T., Hashimoto, J., Abe, Lyu, Brander, W., Egner, S., Feldt, M., Grady, C. A., Guyon, O., Henning, T., Hodapp, K. W., Knapp, G. R., Mono-Martin, A., Pyo, T., Serabyn, E., Suenaga, Takuya, Takahashi, Yasuhiro H., Takami, M., Thalmann, C., Mizuki, Toshiyuki, Kuzuhara, Masayuki, Yamada, Toru, Matsuo, Taro, Nakagawa, Takao, Kusakabe, Nobuhiko, Goto, Miwa, Hayano, Yutaka, Hayashi, Masahiko, Hayashi, Saeko S., Ishii, Miki, Iye, Masanori, Kandori, R., Kwon, Jungmi, Miyama, Shoken, Morino, Jun-ichi, Moro-Martin, A., Nishimura, Tetsuo, Suto, Hiroshi, Suzuki, Ryuji, Takato, Naruhisa, Terada, Hiroshi, Watanabe, Makoto, Takami, Hideki, Usuda, Tomonori, and Tamura, Motohide

Subjects
010504 meteorology & atmospheric sciences, Phase (waves), FOS: Physical sciences, Astrophysics, 01 natural sciences, stars: individual (GJ1108A), stars: low-mass, 0103 physical sciences, Binary system, Adaptive optics, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), 0105 earth and related environmental sciences, Physics, Earth and Planetary Astrophysics (astro-ph.EP), Accretion (meteorology), Astronomy and Astrophysics, Astrometry, Mass comparison, binaries: visual, stars: imaging, Radial velocity, Stars, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astrophysics::Earth and Planetary Astrophysics, binaries: spectroscopic, Astrophysics - Earth and Planetary Astrophysics
Abstract

著者人数: 58名（所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 水木, 敏幸; 山田, 亨; 中川, 貴雄; 權, 靜美), Accepted: 2018-08-13, 資料番号: SA1180204000

Published
2018
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3. HPOL: World's largest database of optical spectropolarimetry.

Author

Meade, M. R., Whitney, B. A., Babler, B. L., Nordsieck, K. H., Bjorkman, K. S., and Wisniewski, J. P.

Subjects
ASTROPHYSICAL spectropolarimetry, STARS, ASTRONOMICAL observations, OPTICAL instruments, WAVELENGTHS, DATA analysis, ASTRONOMICAL instruments
Abstract

We describe a database of optical spectropolarimetry on over 500 stars observed between 1989 and 2004. The wavelength range was 3200-7750Å prior to 1995, and 3200-10500Å from 1995-2004, with spectral resolution 10-25Å. Much of the data are publicly available from the Multimission Archive at STScI (MAST; http://archive.stsci.edu/hpol/), with more delivered as they are processed. Detailed information on each source is available on our website (http://www.sal.wisc.edu/HPOL/). We encourage all interested researchers to make use of this high-quality data set. [ABSTRACT FROM AUTHOR]

Published
2012
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4. Evidence for a New Dust Creation Paradigm in Recurrent Novae: Milliarcsecond Resolution Mid-Infrared Observations of RS Ophiuchi.

Author

Danchi, W. C., Barry, R. K., Traub, W. A., Sokoloski, J. L., Wisniewski, J. P., Serabyn, E., and Kuchner, M. J.

Subjects
NOVAE (Astronomy), INTERFEROMETERS, STAR observations, ASTRONOMICAL observations, STARS
Abstract

We report observations of the nova RS Ophiuchi (RS Oph) using the Keck Interferometer Nuller (KIN), approximately 3.8 days following the most recent outburst of 2006 February 12. These observations represent the first scientific results from the KIN, which operates in N-band from 8 to 12.5 μm in a nulling mode. In this mode the stellar light itself is suppressed by a destructive fringe, effectively enhancing the contrast of any nearby (constructive fringe) source, which in this case is the circumstellar material located near the star. By fitting the unique KIN data, we have obtained an angular size of the mid-infrared continuum of 6.2±0.6, 4.0±0.4, or 5.4±0.6 mas for disk, gaussian (FWHM), and shell profiles, respectively. The data show evidence of enhanced neutral atomic hydrogen emission and atomic metals including silicon located in the inner spatial regime (<5 AU) near the white dwarf (WD) relative to the outer regime. There are also nebular emission lines and evidence of hot silicate dust in the outer spatial region, centered at about 17 AU from the WD that are not found in the inner regime. Our evidence suggests that these features have been excited by the nova flash in the outer spatial regime before the blast wave reached these regions, in support a model in which the dust appears to be present between outbursts. The present results are consistent with a unifying model of the system that includes an increase in density in the plane of the orbit of the two stars created by a spiral shock wave caused by the motion of the stars through the cool wind of the red giant star. [ABSTRACT FROM AUTHOR]

Published
2009
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5. DYNAMICAL EVOLUTION OF VISCOUS DISKS AROUND BE STARS. II. POLARIMETRY.

Author

Haubois, X., Mota, B. C., Carciofi, A. C., Draper, Z. H., Wisniewski, J. P., Bednarski, D., and Rivinius, Th.

Subjects
CIRCUMSTELLAR matter, INTERSTELLAR medium, STARS, RADIATIVE transfer, RADIATION
Abstract

Be stars exhibit variability for a great number of observables. Putting the pieces of the disk dynamics together is not an easy task and requires arduous modeling before achieving a good fit to the observational data. In order to guide the modeling process and make it more efficient, it is very instructive to investigate reference dynamical cases. This paper focuses on continuum polarimetric quantities and is the second of a series that aims to demonstrate the capacity of deriving the dynamical history and fundamental parameters of a classical Be star through follow-up of various observables. After a detailed study of the different opacities at play in the formation of polarized spectra, we investigate predictions of polarimetric observables in the continuum for different dynamical scenarios. Our models are based on a coupling of a hydrodynamic viscous decretion simulations in a disk and a three-dimensional non-LTE radiative transfer code. Through introduction of the polarization color diagram (PCD), we show that certain combinations of polarimetric observables exhibit features that are characteristic of a mass-loss history. This diagram also enables estimates of fundamental parameters such as the inclination angle, disk density scale, and the α viscous diffusion parameter. We present the PCD as a powerful diagnosis tool to track the dynamical phases of a Be star, such as disk build-up, dissipation, periodic, and episodic outbursts. Finally, we confront our models with observations of four Be stars that exhibited long-term polarimetric activity. [ABSTRACT FROM AUTHOR]

Published
2014
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6. High-contrast Polarimetry Observation of T Tau Circumstellar Environment

Author

Eugene Serabyn, Wolfgang Brandner, Edwin L. Turner, Toru Yamada, Gillian R. Knapp, Thomas Henning, Satoshi Mayama, Shoken Miyama, Hideki Takami, Yi Yang, Jungmi Kwon, Eiji Akiyama, Michihiro Takami, Hiroshi Terada, Miwa Goto, Ryuji Suzuki, Takuya Suenaga, Naruhisa Takato, Lyu Abe, Yutaka Hayano, Tomoyuki Kudo, Michael W. McElwain, T. Currie, Tomonori Usuda, Ryo Kandori, Markus Janson, Takao Nakagawa, Nobuhiko Kusakabe, Klaus W. Hodapp, Yasuhiro H. Takahashi, Jun-Ichi Morino, Jun Hashimoto, Masayuki Kuzuhara, Tetsuo Nishimura, Roman R. Rafikov, Makoto Watanabe, Masanori Iye, Daehyeon Oh, Joseph C. Carson, Hiroshi Suto, Taro Matsuo, Munetake Momose, Timothy D. Brandt, Motohide Tamura, Tae-Soo Pyo, Christian Thalmann, Olivier Guyon, Amaya Moro-Martin, Miki Ishii, Carol A. Grady, Masahiko Hayashi, Sebastian Egner, Saeko S. Hayashi, Markus Feldt, John P. Wisniewski, Yang, Y [0000-0002-9024-4150], Mayama, S [0000-0002-3424-6266], Akiyama, E [0000-0002-5082-8880], Currie, T [0000-0002-7405-3119], Janson, M [0000-0001-8345-593X], Momose, M [0000-0002-3001-0897], Nakagawa, T [0000-0002-6660-9375], Oh, D [0000-0003-2691-804X], Kudo, T [0000-0002-9294-1793], Brandt, TD [0000-0003-2630-8073], Guyon, O [0000-0002-1097-9908], Hayano, Y [0000-0003-4937-4233], Hodapp, KW [0000-0003-0786-2140], Kandori, R [0000-0003-2610-6367], Knapp, GR [0000-0002-9259-1164], Kwon, J [0000-0003-2815-7774], Miyama, S [0000-0001-5017-180X], Moro-Martin, A [0000-0001-9504-8426], Pyo, TS [0000-0002-3273-0804], Takami, M [0000-0001-9248-7546], Terada, H [0000-0002-7914-6779], Thalmann, C [0000-0002-1664-2177], Watanabe, M [0000-0002-3656-4081], Wisniewski, J [0000-0001-9209-1808], Usuda, T [0000-0001-9855-0163], Tamura, M [0000-0002-6510-0681], and Apollo - University of Cambridge Repository

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Polarimetry, FOS: Physical sciences, Astrophysics, stars: pre-main sequence, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 010309 optics, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Adaptive optics, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, Earth and Planetary Astrophysics (astro-ph.EP), Physics, binaries: general (T Tau), protoplanetary disks, Astronomy and Astrophysics, Polarization (waves), Position angle, Stars, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, stars: variables: T Tauri, Herbig Ae/Be, Outflow, Astrophysics::Earth and Planetary Astrophysics, Circumbinary planet, Subaru Telescope, Astrophysics - Earth and Planetary Astrophysics
Abstract

著者人数: 55名(所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 中川, 貴雄; 權, 靜美), Accepted: 2018-05-18, 資料番号: SA1180099000

Published
2018

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