196 citations · 687 across the 11 of their papers we have counts for
11 papers
Traits for chemical evolution in solar twins: Trends of neutron-capture elements with stellar age
Paula Jofre, Holly Jackson, Marcelo Tucci Maia
The physical processes driving chemical evolution in the Milky Way can be probed using the distribution of abundances in low-mass FGK type stars in space phase at different times.…
Revisiting the 16 Cygni planet host at unprecedented precision and exploring automated tools for precise abundances
M. Tucci Maia, J. Meléndez, D. Lorenzo-Oliveira +2
The binary system 16 Cygni is key in studies of the planet-star chemical composition connection, as only one of the stars is known to host a planet. This allows us to better assess…
The Gaia FGK benchmark stars version 2.1
Paula Jofre, Ulrike Heiter, Marcelo Tucci Maia +5
The Gaia FGK benchmark stars are among the preferred samples of reference stars to test parametrisation pipelines of spectroscopic surveys. They consist of a small but carefully se…
The Solar Twin Planet Search. V. Close-in, low-mass planet candidates and evidence of planet accretion in the solar twin HIP 68468
Jorge Melendez, Megan Bedell, Jacob L. Bean +14
[Methods]. We obtained high-precision radial velocities with HARPS on the ESO 3.6 m telescope and determined precise stellar elemental abundances (~0.01 dex) using MIKE spectra on…
The Solar Twin Planet Search III. The [Y/Mg] clock: estimating stellar ages of solar-type stars
M. Tucci Maia, I. Ramírez, J. Meléndez +3
Solar twins are stars with similar stellar (surface) parameters to the Sun that can have a wide range of ages. This provide an opportunity to analyze the variation of their chemica…
HIP 10725: The First Solar Twin/Analogue Field Blue Straggler
Lucas Schirbel, Jorge Melendez, Amanda I. Karakas +9
[Context]. Blue stragglers are easy to identify in globular clusters, but are much harder to identify in the field. Here we present the serendipitous discovery of one field blue st…
The Solar Twin Planet Search II. A Jupiter twin around a solar twin
M. Bedell, J. Melendez, J. L. Bean +8
Through our HARPS radial velocity survey for planets around solar twin stars, we have identified a promising Jupiter twin candidate around the star HIP11915. We characterize this K…
Shallow extra mixing in solar twins inferred from Be abundances
M. Tucci Maia, J. Meléndez, M. Castro +5
Lithium and beryllium are destroyed at different temperatures in stellar interiors. As such, their relative abundances offer excellent probes of the nature and extent of mixing pro…
The Solar Twin Planet Search. I. Fundamental parameters of the stellar sample
I. Ramirez, J. Melendez, J. Bean +10
We are carrying out a search for planets around a sample of solar twin stars using the HARPS spectrograph. The goal of this project is to exploit the advantage offered by solar twi…
High precision abundances in the 16 Cyg binary system: a signature of the rocky core in the giant planet
Marcelo Tucci Maia, Jorge Melendez, Ivan Ramirez
We study the stars of the binary system 16 Cygni to determine with high precision their chemical composition. Knowing that the component B has a detected planet of at least 1.5 Jup…
The UBV(RI)c colors of the Sun
I. Ramirez, R. Michel, R. Sefako +6
Photometric data in the UBV(RI)c system have been acquired for 80 solar analog stars for which we have previously derived highly precise atmospheric parameters Teff, log g, and [Fe…