A terrestrial planet candidate in a temperate orbit around Proxima Centauri
- G. Anglada-Escudé, P. Amado, M. Zechmeister
- PhysicsNature
- 25 August 2016
Observations reveal the presence of a small planet with a minimum mass of about 1.3 Earth masses orbiting Proxima with a period of approximately 11.2 days at a semi-major-axis distance of around 0.05 astronomical units.
ROTATIONAL VELOCITIES FOR M DWARFS
- J. Jenkins, L. Ramsey, D. Pinfield
- Physics, Geology
- 27 August 2009
We present spectroscopic rotation velocities (v sin i) for 56 M dwarf stars using high-resolution Hobby–Eberly Telescope High Resolution Spectrograph red spectroscopy. In addition, we have also…
A PLANETARY SYSTEM AROUND THE NEARBY M DWARF GJ 667C WITH AT LEAST ONE SUPER-EARTH IN ITS HABITABLE ZONE
- G. Anglada-Escud'e, P. Arriagada, J. Jenkins
- Physics, Geology
- 2 February 2012
We re-analyze 4 years of HARPS spectra of the nearby M1.5 dwarf GJ 667C available through the European Southern Observatory public archive. The new radial velocity (RV) measurements were obtained…
Chromospheric activities and kinematics for solar type dwarfs and subgiants : analysis of the activity distribution and the AVR
- J. Jenkins, F. Murgas, D. Pinfield
- Physics
- 3 March 2011
Aims. In this work we present chromospheric activity indices, kinematics, radial-velocities, and rotational velocities for more than 850 FGK-type dwarfs and subgiant stars in the southern hemisphere…
Effective temperatures, rotational velocities, microturbulent velocities and abundances in the atmospheres of the Sun, HD 1835 and HD 10700
- Ya.V.Pavlenko, J. Jenkins, H.R.A.Jones, O. Ivanyuk, D. Pinfield
- Physics, Geology
- 24 January 2012
We describe our procedure to determine effective temperatures, rotational velocities, microturbulent velocities, and chemical abundances in the atmospheres of Sun-like stars. We use independent…
A dynamically-packed planetary system around GJ 667C with three super-Earths in its habitable zone
- G. Anglada-Escud'e, M. Tuomi, H. Jones
- Physics, Geology
- 25 June 2013
Guillen Anglada-Escude, et al, 'A dynamically-packed planetary system around GJ 667J with three super-Earths in its habitable zone', A&A, Vol. 556, A126, first published online 7 August 2013. The…
Metallicities and activities of southern stars
- J. Jenkins, H. Jones, Y. Pavlenko, D. Pinfield, J. Barnes, Y. Lyubchik
- Physics
- 8 April 2008
Aims. We present the results from high-resolution spectroscopic measurements to determine metallicities and activities of bright stars in the southern hemisphere. Methods. We measured the iron…
Signals embedded in the radial velocity noise - Periodic variations in the τ Ceti velocities
- M. Tuomi, H. Jones, D. Pinfield
- Geology, Physics
- 18 December 2012
Context. The abilities of radial velocity exoplanet surveys to detect the lowest-mass extra-solar planets are currently limited by a combination of instrument precision, lack of data, and 'jitter'.…
Two planets around Kapteyn's star: a cold and a temperate super-Earth orbiting the nearest halo red dwarf
- G. Anglada-Escud'e, P. Arriagada, H. Jones
- Physics, Geology
- 3 June 2014
Exoplanets of a few Earth masses can be now detected around nearby low-mass stars using Doppler spectroscopy. In this paper, we investigate the radial velocity variations of Kapteyn's star, which is…
GJ 832c: A SUPER-EARTH IN THE HABITABLE ZONE
- R. Wittenmyer, M. Tuomi, M. Díaz
- Physics, Geology
- 21 June 2014
We report the detection of GJ 832c, a super-Earth orbiting near the inner edge of the habitable zone of GJ 832, an M dwarf previously known to host a Jupiter analog in a nearly circular 9.4 yr orbit.…
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