409 citations · 870 across the 29 of their papers we have counts for
16 papers · 1 filter
The Gaia Ultracool Dwarf Sample -- VI. Spectral Types and Properties of 51 Ultracool Dwarfs
Gemma Cheng, H. R. A. Jones, R. L. Smart +7
Near-infrared spectra from the IRTF/SpeX and Blanco/ARCoIRIS telescope/instrument combinations are used for spectroscopic classification, to measure radial velocities and for the i…
Accretion Funnel Reconfiguration during an Outburst in a Young Stellar Object: EX Lupi
Koshvendra Singh, Joe P. Ninan, Marina M. Romanova +14
EX Lupi, a low-mass young stellar object, went into an accretion-driven outburst in March of 2022. The outburst caused a sudden phase change of ~ 112 5 in…
A Benchmark White Dwarf-Ultracool Dwarf Wide Field Binary
Thiago Ferreira, Roberto K. Saito, Dante Minniti +8
We present the discovery and multi-wavelength characterisation of VVV J1438-6158 AB, a new field wide-binary system consisting of a 4.6(+5.5-2.4) Gyr and Teff = 9500+/-125 K DA whi…
VVV-WIT-12 and its fashionable nebula: a four year long period Young Stellar Object with a light echo?
Roberto K. Saito, Bringfried Stecklum, Dante Minniti +7
We report the serendipitous discovery of VVV-WIT-12, an unusual variable source that seems to induce variability in its surrounding nebula. The source belongs to the rare objects t…
VVVX near-IR photometry for 99 low-mass stars in the Gaia EDR3 Catalog of Nearby Stars
Andrea Mejías, Dante Minniti, Javier Alonso-García +3
Red dwarf stars, which represent 75% of stars in the Milky Way, can be studied in great detail in the solar neighborhood where the sample is more complete. We intend to better char…
Serendipitous discovery of a dusty disc around WDJ181417.84-735459.83
E. González Egea, R. Raddi, D. Koester +8
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 spec…
The VVV Infrared Variability Catalog (VIVA-I)
C. E. Ferreira Lopes, N. J. G. Cross, M. Catelan +17
Thanks to the VISTA Variables in the Via Lactea (VVV) ESO Public Survey it is now possible to explore a large number of objects in those regions. This paper addresses the variabili…
The Gaia Ultra-Cool Dwarf Sample -- II: Structure at the end of the main sequence
R. L. Smart, F. Marocco, L. M. Sarro +4
We identify and investigate known late M, L and T dwarfs in the Gaia second data release. This sample is being used as a training set in the Gaia data processing chain of the ultra…
VVV-WIT-07: another Boyajian's star or a Mamajek's object?
Roberto K. Saito, Dante Minniti, Valentin D. Ivanov +6
We report the discovery of VVV-WIT-07, an unique and intriguing variable source presenting a sequence of recurrent dips with a likely deep eclipse in July 2012. The object was foun…
Sub-millimeter non-contaminated detection of the disk around TWA\,7 by ALMA
A. Bayo, J. Olofsson, L. Matra +9
Debris disks can be seen as the left-overs of giant planet formation and the possible nurseries of rocky planets. While M-type stars out-number more massive stars we know very litt…
The Gaia Ultracool Dwarf Sample. I. Known L and T dwarfs and the first Gaia data release
R. L. Smart, F. Marocco, J. A. Caballero +5
We identify and investigate known ultracool stars and brown dwarfs that are being observed or indirectly constrained by the Gaia mission. These objects will be the core of the Gaia…
Near-IR trigonometric parallaxes of nearby stars in the Galactic plane using the VVV
J. C. Beamin, R. A. Mendez, R. L. Smart +7
We use the multi-epoch K band observations, covering a 5 years baseline to obtain milli and sub-milli arcsec precision astrometry for a sample of eighteen previously…
High proper motion objects towards the inner Milky Way: characterisation of newly identified nearby stars from the VISTA Variables in the Via Lactea Survey
M. Gromadzki, R. Kurtev, J. C. Beamin +10
The census of the Solar neighbourhood is still incomplete, as demonstrated by recent discoveries of many objects within 5-10 pc from the Sun. The area around the mid-plane and bulg…
VVV High proper motion stars I. The catalogue of bright Ks < 13.5 stars
R. Kurtev, M. Gromadzki, J. C. Beamin +14
Knowledge of the stellar content near the Sun is important for a broad range of topics ranging from the search for planets to the study of Milky Way structure. The most powerful me…
Temperature constraints on the coldest brown dwarf known WISE 0855-0714
J. C. Beamín, V. D. Ivanov, A. Bayo +10
Context. Nearby isolated planetary mass objects are beginning to be discovered, but their individual properties are poorly constrained because their low surface temperatures and st…
VVV High Proper Motion Survey
M. Gromadzki, R. Kurtev, S. Folkes +7
Here we present survey of proper motion stars towards the Galactic Bulge and an adjacent plane region base on VISTA-VVV data. The searching method based on cross-matching photometr…