Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Zhoujian Zhang"'
Publikováno v:
Zhang, Z, Liu, M C, Best, W M J, Dupuy, T J & Siverd, R J 2021, ' The Hawaii Infrared Parallax Program. V. New T-Dwarf Members and Candidate Members of Nearby Young Moving Groups ', Astrophysical Journal, vol. 911, no. 1, 7, pp. 1-22 . https://doi.org/10.3847/1538-4357/abe3fa
We present a search for new planetary-mass members of nearby young moving groups (YMGs) using astrometry for 694 T and Y dwarfs, including 447 objects with parallaxes, mostly produced by recent large parallax programs from UKIRT and Spitzer. Using th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1566337c294399ea0aa1094a45277495
Autor:
Beth Biller, Katelyn N. Allers, Blake Pantoja, Loic Albert, Trent J. Dupuy, Sophie Dubber, Michael C. Liu, Zhoujian Zhang, C. Fontanive
Publikováno v:
Fontanive, C, Allers, K N, Pantoja, B, Biller, B, Dubber, S, Zhang, Z, Dupuy, T, Liu, M C & Albert, L 2020, ' A wide planetary-mass companion to a young low-mass brown dwarf in Ophiuchus ', Astrophysical Journal Letters, vol. 905, no. 2, L14, pp. 1-7 . https://doi.org/10.3847/2041-8213/abcaf8
We present the discovery of a planetary-mass companion to CFHTWIR-Oph 98, a low-mass brown dwarf member of the young Ophiuchus star-forming region, with a wide 200-au separation (1.46 arcsec). The companion was identified using Hubble Space Telescope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57d6417a84bd0039c8b8da0560d78df5
https://www.pure.ed.ac.uk/ws/files/185237990/2011.08871v1.pdf
https://www.pure.ed.ac.uk/ws/files/185237990/2011.08871v1.pdf
We present a forward-modeling framework using the Bayesian inference tool Starfish and cloudless Sonora-Bobcat model atmospheres to analyze low-resolution ($R\approx80-250$) near-infrared ($1.0-2.5$ $\mu$m) spectra of T dwarfs. Our approach infers ef
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6ad404cd343f8181af10464044a92e4
http://arxiv.org/abs/2011.12294
http://arxiv.org/abs/2011.12294
Autor:
Zhoujian Zhang, Philippe Zarka, Joseph R. Callingham, L. Lamy, Aleksandar Shulevski, Timothy W. Shimwell, H. J. A. Röttgering, William M. J. Best, Kaushik De, Harish Vedantham, Michael C. Liu, Trent J. Dupuy
Publikováno v:
Vedantham, H K, Callingham, J R, Shimwell, T W, Dupuy, T, Best, W M J, Liu, M C, Zhang, Z, De, K, Lamy, L, Zarka, P, Rottgering, H J A & Shulevski, A 2020, ' Direct radio discovery of a cold brown dwarf ', Astrophysical Journal Letters, vol. 903, no. L33, pp. 1-13 . https://doi.org/10.3847/2041-8213/abc256
Astrophysical Journal Letters, 903(2):33. IOP PUBLISHING LTD
The Astrophysical journal letters
The Astrophysical journal letters, Bristol : IOP Publishing, 2020, 903 (2), pp.L33. ⟨10.3847/2041-8213/abc256⟩
The Astrophysical Journal Letters, 903(2), L33
Astrophysical Journal Letters, 903(2):33. IOP PUBLISHING LTD
The Astrophysical journal letters
The Astrophysical journal letters, Bristol : IOP Publishing, 2020, 903 (2), pp.L33. ⟨10.3847/2041-8213/abc256⟩
The Astrophysical Journal Letters, 903(2), L33
Magnetospheric processes seen in gas-giants such as aurorae and circularly-polarized cyclotron maser radio emission have been detected from some brown dwarfs. However, previous radio observations targeted known brown dwarfs discovered via their infra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd28afcd433bf0b082367c279c8b0975
https://hdl.handle.net/1887/3133590
https://hdl.handle.net/1887/3133590
Autor:
Ed Wetherell, Trent J. Dupuy, Nemanja Jovanovic, Benjamin J. Shappee, Michael A. Tucker, Gilles Chabrier, Jacques-Robert Delorme, Peter Wizinowich, Sylvain Cetre, Stanimir Metchev, Zhoujian Zhang, Sam Ragland, Mark Chun, Michael C. Liu, Isabelle Baraffe, Aaron Do, Thierry Forveille, Andrew W. Mann, Scott Lilley, Charlotte Z. Bond, Pascal Tremblin, Anna V. Payne, William M. J. Best, Dimitri Mawet
Publikováno v:
The Astronomical Journal
The Astronomical Journal, 2019, 158, ⟨10.3847/1538-3881/ab3cd1⟩
The Astronomical Journal, 2019, 158, ⟨10.3847/1538-3881/ab3cd1⟩
We present individual dynamical masses for the nearby M9.5+T5.5 binary WISE J072003.20$-$084651.2AB, a.k.a. Scholz's star. Combining high-precision CFHT/WIRCam photocenter astrometry and Keck adaptive optics resolved imaging, we measure the first hig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c0defb2880300223bc967bb257cfa71
http://arxiv.org/abs/1908.06994
http://arxiv.org/abs/1908.06994
Autor:
Aaron Do, Pier-Emmanuel Tremblay, Eugene A. Magnier, Mark S. Marley, Benjamin J. Shappee, Zhoujian Zhang, Anna V. Payne, Michael C. Liu, Michael A. Tucker, J. J. Hermes
Publikováno v:
The Astrophysical Journal
We present the first discovery from the COol Companions ON Ultrawide orbiTS (COCONUTS) program, a large-scale survey for wide-orbit planetary and substellar companions. We have discovered a co-moving system COCONUTS-1, composed of a hydrogen-dominate