• Corpus ID: 119513796

Searching sub-stellar objects in DR1-TGAS, effectiveness and efficiency of Gaias' astrometry

@article{CuartasRestrepo2018SearchingSO,
  title={Searching sub-stellar objects in DR1-TGAS, effectiveness and efficiency of Gaias' astrometry},
  author={Pablo Cuartas-Restrepo and O. A. S'anchez-Hern'andez and M. Medina-M},
  journal={arXiv: Earth and Planetary Astrophysics},
  year={2018}
}
We used 1,477,047 data from DR1-TGAS, in order to analyse the minimum require- ments of accuracy, necessary to detect sub-stellar objects in the astrometric mea- surements of Gaia. We found that the first set of data (DR1) does not have enough accuracy, so sub-stellar objects can not be easily detected. Barely, it would be possible to detect jovian and higher mass objects, with orbital periods over 5 years. We made the calculations of the minimum values of the astrometric angle produced by an… 

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References

SHOWING 1-10 OF 30 REFERENCES

ASTROMETRIC EXOPLANET DETECTION WITH GAIA

We provide a revised assessment of the number of exoplanets that should be discovered by Gaia astrometry, extending previous studies to a broader range of spectral types, distances, and magnitudes.

Fundamental parameters and infrared excesses of Tycho–Gaia stars

Effective temperatures and luminosities are calculated for 1,475,921 Tycho-2 and 107,145 Hipparcos stars, based on distances from Gaia Data Release 1. Parameters are derived by comparing

Gaia Data Release 1 - Astrometry: one billion positions, two million proper motions and parallaxes

Gaia Data Release 1 (Gaia DR1) contains astrometric results for more than 1 billion stars brighter than magnitude 20.7 based on observations collected by the Gaia satellite during the first 14 months

Gaia Data Release 1 Summary of the astrometric, photometric, and survey properties

Context. At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7.

Gaia broad band photometry

Aims. The scientific community needs to be prepared to analyse the data from Gaia, one of the most ambitious ESA space missions, which is to be launched in 2012. The purpose of this paper is to

Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures ?

The Hipparcos mission has made it possible to con- strain the positions of nearby field stars in the colour-magnitude diagram with very high accuracy. These positions can be com- pared with the

Astrometric detection of giant planets around nearby M dwarfs: the Gaia potential

Cool M dwarfs within a few tens of parsecs from the Sun are becoming the focus of dedicated observational programs in the realm of exoplanet astrophysics. Gaia, in its all-sky survey of >10 9

Preliminary Astrometric Masses for Proposed Extrasolar Planetary Companions

As a first step in the implementation of an astrometric survey, we have reduced the Hipparcos intermediate astrometric data (IAD) for 30 stars that currently exhibit small-amplitude periodic radial

Astrometry and exoplanets in theGaiaera: a Bayesian approach to detection and parameter recovery

TheGaiamission is expected to make a significant contribution to the knowledge of exoplanet systems, both in terms of their number and of their physical properties. We develop Bayesian methods and

IMPACT OF ηEarth ON THE CAPABILITIES OF AFFORDABLE SPACE MISSIONS TO DETECT BIOSIGNATURES ON EXTRASOLAR PLANETS

We present an analytic model to estimate the capabilities of space missions dedicated to the search for biosignatures in the atmosphere of rocky planets located in the habitable zone of nearby stars.