Výsledky vyhledávání - "R. S. Pokorny"

Spectroscopic signatures of youth in low-mass kinematic candidates of young moving groups

Autor: John R. Barnes, D. J. Pinfield, James S. Jenkins, Ya. V. Pavlenko, Ben Burningham, Avril C. Day-Jones, A. E. García Pérez, C. del Burgo, E. L. Martín, M. C. Gálvez-Ortiz, S. L. Folkes, R. S. Pokorny, M. Kuznetsov, Hugh R. A. Jones, J. R. A. Clarke

Publikováno v: Monthly Notices of the Royal Astronomical Society
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

We present a study of age-related spectral signatures observed in 25 young low-mass objects that we have previously determined as possible kinematic members of five young moving groups: the Local Association (Pleiades moving group, age = 20-150 Myr),

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f03e57fce7e9d452b4040fff52064490
https://doi.org/10.1093/mnras/stu241

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Spectroscopy and kinematics of low-mass members of young moving groups

Autor: A. E. Garcia Perez, James S. Jenkins, S. L. Folkes, Ben Burningham, Avril C. Day-Jones, D. J. Pinfield, R. S. Pokorny, J. R. A. Clarke, Hugh R. A. Jones, John R. Barnes, M. C. Gálvez-Ortiz

Publikováno v: Monthly Notices of the Royal Astronomical Society. 409:552-566

We study a target sample of 68 low-mass objects (with spectral types in the range M4.5-L1) previously selected via photometric and astrometric criteria, as possible members of five young moving groups: the Local Association (Pleiades moving group, ag

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a5364c803ad6efcb9a6e4928255508e
https://doi.org/10.1111/j.1365-2966.2010.17361.x

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A search for southern ultracool dwarfs in young moving groups

Autor: James S. Jenkins, D. J. Pinfield, Ben Burningham, R. S. Pokorny, Niall R. Deacon, M. C. Gálvez-Ortiz, J. R. A. Clarke, Hugh R. A. Jones, Avril C. Day-Jones, John R. Barnes

Publikováno v: Monthly Notices of the Royal Astronomical Society. 402:575-588

We associate 132 low-mass ultracool dwarfs in the southern hemisphere as candidate members of five moving groups using photometric and astrometric selection techniques. Of these objects, we present high resolution spectroscopy for seven candidates an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db6cca8e3ff0f59094738e524049c1a4
https://doi.org/10.1111/j.1365-2966.2009.15910.x

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The Liverpool-Edinburgh high proper motion catalogue

Autor: Hugh R. A. Jones, D. J. Pinfield, Nigel Hambly, R. S. Pokorny

Publikováno v: Astronomy & Astrophysics. 421:763-770

We present a machine selected catalogue of 11 289 objects with proper motions exceeding 0.18 �� yr −1 and an R-band faint magnitude limit of 19.5 mag. The catalogue was produced using SuperCOSMOS digitized R-Band ESO and UK Schmidt Plates in 28

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7eea79a36025b120636f2fc568a36a7d
https://doi.org/10.1051/0004-6361:20047009

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Benchmark low-mass objects in Moving Groups

Autor: J. R. A. Clarke, E. L. Martín, M. C. Gálvez-Ortiz, Avril C. Day-Jones, James S. Jenkins, Ben Burningham, Ya. V. Pavlenko, D. J. Pinfield, John R. Barnes, Hugh R. A. Jones, R. S. Pokorny, M. Kuznetsov, A. E. García Pérez

Publikováno v: EPJ Web of Conferences, Vol 47, p 05007 (2013)

In order to compile a sample of ultracool dwarfs that will serve as benchmarks for testing theoretical formation and evolutionary models, we selected low-mass cool (>M7) objects that are potentially members of five known young Moving Groups in the so

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1100984c81fc35b77d55fca38fbc7af5
https://doaj.org/article/882889407e414277b698bfdc33961e76

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Discovery of the first wide L dwarf + giant binary system and eight other ultracool dwarfs in wide binaries

Autor: James S. Jenkins, Ben Burningham, R. S. Pokorny, M. C. Gálvez-Ortiz, C. G. Tinney, H. R. A. Jones, D. J. Weights, D. J. Pinfield, Zhihua Zhang, Jesús Gallardo, A. E. Garcia Perez, Zhong-Tao Han, Shawn Yu, Avril C. Day-Jones

Publikováno v: Monthly Notices of the Royal Astronomical Society
Artículos CONICYT
CONICYT Chile
instacron:CONICYT

We identify 806 ultra-cool dwarfs from their SDSS riz photometry (of which 34 are newly discovered L dwarfs) and obtain proper motions through cross matching with UKIDSS and 2MASS. Proper motion and distance constraints show that nine of our ultra-co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2cce974f981baaf82602844f9625416
https://doi.org/10.1111/j.1365-2966.2010.16394.x

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A search for southern ultracool dwarfs in young moving groups

Autor: J. R. A. Clarke, Hugh R. A. Jones, James S. Jenkins, Avril C. Day-Jones, Ben Burningham, Niall R. Deacon, D. J. Pinfield, John R. Barnes, R. S. Pokorny, M. C. Gálvez-Ortiz

Publikováno v: Monthly Notices of the Royal Astronomical Society, 402, 1, pp. 575-588
EPJ Web of Conferences, Vol 16, p 06004 (2011)
Monthly Notices of the Royal Astronomical Society, 402, 575-588
Monthly Notices of the Royal Astronomical Society
Artículos CONICYT
CONICYT Chile
instacron:CONICYT

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5880adefa9c71c4ef135e1c981d2bdd
https://hdl.handle.net/2066/76167

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Ultra-cool dwarfs: new discoveries, proper motions, and improved spectral typing from SDSS and 2MASS photometric colors

Autor: D. J. Pinfield, Zhenyu Zhang, Da-Ming Chen, Hugh R. A. Jones, Ben Burningham, Peizhan Chen, Zhanwen Han, R. S. Pokorny, M. C. Gálvez-Ortiz

Aims. We try to identify ultra-cool dwarfs from the seventh Data Release of the Sloan Digital Sky Survey (SDSS DR7) with SDSS i-z and r-z colors. We also obtain proper motion data from SDSS, 2MASS, and UKIDSS and improve spectral typing from SDSS and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ca904b9ec0438ced6828d06941b5c46
http://arxiv.org/abs/0902.2798

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New, nearby bright southern ultracool dwarfs

Autor: Hugh R. A. Jones, T. R. Kendall, D. J. Pinfield, D. J. Weights, James S. Jenkins, S. L. Folkes, Nicolas Mauron, R. S. Pokorny

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2007, 374, pp.445-454. ⟨10.1111/J.1365-2966.2006.11026.X⟩
University of Hertfordshire

We report the discovery of twenty-one hitherto unknown bright southern ultracool dwarfs with spectral types in the range M7 to L5.5, together with new observations of a further three late M dwarfs previously confirmed. Three more objects are already

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::233ab03ec7131859e56c88a2d13013d7
http://arxiv.org/abs/astro-ph/0609396

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