Zobrazeno 1 - 10
of 414
pro vyhledávání: '"Pinfield, D. J."'
Autor:
Cooper, W. J., Jones, H. R. A., Smart, R. L., Folkes, S. L., Caballero, J. A., Marocco, F., Ortiz, M. C. Gálvez, Burgasser, A. J., Kirkpatrick, J. D., Sarro, L. M., Burningham, B., Cabrera-Lavers, A., Tremblay, P. E., Reylé, C., Lodieu, N., Zhang, Z. H., Cook, N. J., Faherty, J. F., García-Álvarez, D., Montes, D., Pinfield, D. J., Rajpurohit, A. S., Shi, J.
As part of our comprehensive, ongoing characterisation of the low-mass end of the main sequence in the Solar neighbourhood, we used the OSIRIS instrument at the 10.4 m Gran Telescopio Canarias to acquire low- and mid-resolution (R$\approx$300 and R$\
Externí odkaz:
http://arxiv.org/abs/2409.03706
Autor:
Baig, Sayan, Smart, R. L., Jones, Hugh R. A., Gagné, Jonathan, Pinfield, D. J., Cheng, Gemma, Moranta, Leslie
We present the Ultracool Dwarf Companion Catalogue of 278 multiple systems, 32 of which are newly discovered, each with at least one spectroscopically confirmed Ultracool Dwarf, within a 100 pc volume-limited sample. This catalogue is compiled using
Externí odkaz:
http://arxiv.org/abs/2408.07024
Autor:
Zhang, Z. H., Raddi, R., Burgasser, A. J., Casewell, S. L., Smart, R. L., Galvez-Ortiz, M. C., Jones, H. R. A., Baig, S., Lodieu, N., Gauza, B., Pavlenko, Ya. V., Jiao, Y. F., Zhao, Z. K., Zhou, S. Y., Pinfield, D. J.
We report the discovery of five white dwarf + ultracool dwarf systems identified as common proper motion wide binaries in the Gaia Catalogue of Nearby Stars. The discoveries include a white dwarf + L subdwarf binary, VVV 1256-62AB, a gravitationally
Externí odkaz:
http://arxiv.org/abs/2407.19219
Autor:
Egea, E. González, Raddi, R., Koester, D., Rogers, L. K., Marocco, F., Cooper, W. J., Beamin, J. C., Burningham, B., Day-Jones, A., Forbrich, J., Pinfield, D. J.
Spectroscopic observations of white dwarfs reveal that many of them are polluted by exoplanetary material, whose bulk composition can be uniquely probed this way. We present a spectroscopic and photometric analysis of the DA white dwarf WDJ181417.84$
Externí odkaz:
http://arxiv.org/abs/2012.05731
Autor:
Marocco, F., Smart, R. L., Mamajek, E. E., Sarro, L. M., Burgasser, A. J., Caballero, J. A., Rees, J. M., Caselden, D., Cruz, K. L., Van Linge, R., Pinfield, D. J.
We present ten new ultra-cool dwarfs in seven wide binary systems discovered using $\textit{Gaia}$ DR2 data, identified as part of our $\textit{Gaia}$ Ultra-Cool Dwarf Sample project. The seven systems presented here include an L1 companion to the G5
Externí odkaz:
http://arxiv.org/abs/2004.04132
Autor:
Zhang, Z. H., Burgasser, A. J., Galvez-Ortiz, M. C., Lodieu, N., Osorio, M. R. Zapatero, Pinfield, D. J., Allard, F.
We presented 15 new T dwarfs that were selected from UKIRT Infrared Deep Sky Survey, Visible and Infrared Survey Telescope for Astronomy, and Wide-field Infrared Survey Explorer surveys, and confirmed with optical to near infrared spectra obtained wi
Externí odkaz:
http://arxiv.org/abs/1903.05536
Autor:
Smart, R. L., Bucciarelli, B., Jones, H. R. A., Marocco, F., Andrei, A. H., Goldman, B., Mendez, R. A., d'Avila, V. A., Burningham, B., Camargo, J. I. B., Crosta, M. T., Daprà, M., Jenkins, J. S., Lachaume, R., Lattanzi, M. G., Penna, J. L., Pinfield, D. J., Neto, D. N. da Silva, Sozzetti, A., Vecchiato, A.
Publikováno v:
2018MNRAS.481.3548S
We present new results from the Parallaxes of Southern Extremely Cool dwarfs program to measure parallaxes, proper motions and multi-epoch photometry of L and early T dwarfs. The observations were made on 108 nights over the course of 8 years using t
Externí odkaz:
http://arxiv.org/abs/1811.00672
Autor:
Zhang, Z. H., Galvez-Ortiz, M. C., Pinfield, D. J., Burgasser, A. J., Lodieu, N., Jones, H. R. A., Martin, E. L., Burningham, B., Homeier, D., Allard, F., Osorio, M. R. Zapatero, Smith, L. C., Smart, R. L., Marti, B. Lopez, Marocco, F., Rebolo, R.
We present 27 new L subdwarfs and classify five of them as esdL and 22 as sdL. Our L subdwarf candidates were selected with the UKIRT Infrared Deep Sky Survey and Sloan Digital Sky Survey. Spectroscopic follow-up was carried out primarily with the OS
Externí odkaz:
http://arxiv.org/abs/1807.10560
Autor:
Zhang, Z. H., Pinfield, D. J., Galvez-Ortiz, M. C., Homeier, D., Burgasser, A. J., Lodieu, N., Martin, E. L., Osorio, M. R. Zapatero, Allard, F., Jones, H. R. A., Smart, R. L., Marti, B. Lopez, Burningham, B., Rebolo, R.
We report the discovery of an esdL3 subdwarf, ULAS J020858.62+020657.0, and a usdL4.5 subdwarf, ULAS J230711.01+014447.1. They were identified as L subdwarfs by optical spectra obtained with the Gran Telescopio Canarias, and followed up by optical-to
Externí odkaz:
http://arxiv.org/abs/1805.08033
Autor:
Smith, L. C., Lucas, P. W., Kurtev, R., Smart, R., Minniti, D., Borissova, J., Jones, H. R. A, Zhang, Z. H., Marocco, F., Peña, C. Contreras, Gromadzki, M., Kuhn, M. A., Drew, J. E., Pinfield, D. J., Bedin, L. R.
We present VIRAC version 1, a near-infrared proper motion and parallax catalogue of the VISTA VVV survey for 312,587,642 unique sources averaged across all overlapping pawprint and tile images covering 560 deg$^2$ of the bulge of the Milky Way and so
Externí odkaz:
http://arxiv.org/abs/1710.08919