71 citations · 342 across the 13 of their papers we have counts for
13 papers
Spectro-astrometry of the pre-transitional star LkCa 15 does not reveal an accreting planet but extended H emission
I. Mendigutía, R. D. Oudmaijer, P. C. Schneider +4
(Abridged) The detection of forming planets in disks around young stars remains elusive, and state-of-the-art observational techniques provide somewhat ambiguous results. It has be…
Discovery of wide low and very low-mass binary systems using Virtual Observatory tools
M. C. Galvez-Ortiz, E. Solano, N. Lodieu +1
The frequency of multiple systems and their properties are key constraints of stellar formation and evolution. Formation mechanisms of very low-mass (VLM) objects are still under c…
New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools: II. SDSS DR7 vs UKIDSS LAS DR6, SDSS DR7 vs UKIDSS LAS DR8, SDSS DR9 vs UKIDSS LAS DR10, and SDSS DR7 vs 2MASS
N. Lodieu, M. Espinoza Contreras, M. R. Zapatero Osorio +4
We aim at developing an efficient method to search for late-type subdwarfs (metal-depleted dwarfs with spectral types >M5) to improve the current statistics. Our objectives are: im…
Constraints on the binary Properties of mid to late T dwarfs from Hubble Space Telescope WFC3 Observations
M. Aberasturi, A. J. Burgasser, A. Mora +4
We used HST/WFC3 observations of a sample of 26 nearby (20 pc) mid to late T dwarfs to search for cooler companions and measure the multiplicity statistics of brown dwarfs. Ti…
Search for bright nearby M dwarfs with Virtual Observatory tools
M. Aberasturi, J. A. Caballero, B. Montesinos +3
Using Virtual Observatory tools, we cross-matched the Carlsberg Meridian 14 and the 2MASS Point Source catalogs to select candidate nearby bright M dwarfs distributed over ~ 25,000…
Polarimetric coronagraphy of BD+31643
G. Olofsson, R. Nilsson, H. -G. Florén +2
Context. The binary B5V star BD+31?643 exhibits a disk-like structure detected at optical wavelengths. Even though the feature is well centered on the star, it has been argued, bas…
New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools: Part I: UKIDSS LAS DR5 vs SDSS DR7
N. Lodieu, M. Espinoza Contreras, M. R. Zapatero Osorio +3
The aim of the project is to improve our knowledge on the low-mass and low-metallicity population to investigate the influence of metallicity of the stellar (and substellar) mass f…
WISE/2MASS-SDSS brown dwarfs candidates using Virtual Observatory tools
M. Aberasturi, E. Solano, E. L. Martin
Massive far-red and infrared imaging surveys in different bandpasses are the main contributors to the discovery of brown dwarfs. The Virtual Observatory represents an adequate fram…
TESELA: a new Virtual Observatory tool to determine blank fields for astronomical observations
N. Cardiel, F. M. Jiménez-Esteban, J. M. Alacid +2
The observation of blank fields, regions of the sky devoid of stars down to a given threshold magnitude, constitutes one of the typical important calibration procedures required fo…
Age determination of the HR8799 planetary system using asteroseismology
A. Moya, P. J. Amado, D. Barrado +4
Discovery of the first planetary system by direct imaging around HR8799 has made the age determination of the host star a very important task. This determination is the key to deri…
Asteroseismic determination of the physical characteristics of the planetary system host HR\,8799 ( Bootis nature and age)
A. Moya, P. J. Amado, D. Barrado +4
HR\,8799 is a Bootis, Doradus star hosting a planetary system and a debris disk with two rings. This makes this system a very interesting target for asteroseismic studies.…
The planetary system host HR\,8799: On its Bootis nature
A. Moya, P. J. Amado, D. Barrado +4
HR\,8799 is a Bootis, Doradus star hosting a planetary system and a debris disk with two rings. This makes this system a very interesting target for asteroseismic studies.…
GTC Osiris spectroscopic identification of a faint L subdwarf in the UKIRT Infrared Deep Sky Survey
N. Lodieu, M. R. Zapatero Osorio, E. L. Martin +2
We present the discovery of an L subdwarf in 234 square degrees common to the UK Infrared Telescope (UKIRT) Infrared Deep Sky Survey Large Area Survey Data Release 2 and the Sloan…