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Results 1 - 43 of 43

ODUSSEAS: a machine learning tool to derive effective temperature and metallicity for M dwarf starsâ˜…
- Virtual Journal - Volume 18, Issue 15 - article #11
- A. Antoniadis-Karnavas, S. G. Sousa, E. Delgado-Mena, N. C. Santos, G. D. C. Teixeira, V. Neves
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/9qlVqO1OtNs/201937194
Chemical abundances of neutron capture elements in exoplanet-hosting stars. (arXiv:1806.06483v1 [astro-ph.EP])
- Virtual Journal - Volume 16, Issue 25 - article #5
- E. Delgado Mena, V. Zh. Adibekyan, P. Figueira, J. I. González Hernández, N. C. Santos, M. Tsantaki, S. G. Sousa, J.P. Faria, L. Suárez-Andrés, G. Israelian
- http://arxiv.org/abs/1806.06483
Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program II: Cu, Zn, Sr, Y, Zr, Ba, Ce, Nd and Eu. (arXiv:1705.04349v1 [astro-ph.SR])
- Virtual Journal - Volume 15, Issue 20 - article #2
- E. Delgado Mena, M. Tsantaki, V. Zh. Adibekyan, S. G. Sousa, N. C. Santos, J. I.González Hernández, G. Israelian
- http://arxiv.org/abs/1705.04349
A COMPARISON OF STELLAR ELEMENTAL ABUNDANCE TECHNIQUES AND MEASUREMENTS
- Virtual Journal - Volume 14, Issue 36 - article #37
- Natalie R. Hinkel, Patrick A. Young, Michael D. Pagano, Steven J. Desch, Ariel D. Anbar, Vardan Adibekyan, Sergi Blanco-Cuaresma, Joleen K. Carlberg, Elisa Delgado Mena, Fan Liu, Thomas Nordlander, Sergio G. Sousa, Andreas Korn, Pieter Gruyters, Ulrike Heiter, Paula JofrÃƒÂ©, Nuno C. Santos,, Caroline Soubiran
- The Astrophysical Journal Supplement Series
- http://iopscience.iop.org/0067-0049/226/1/4
Identifying the best iron-peak and $α$-capture elements for chemical tagging: The impact of the number of lines on measured scatter
- Virtual Journal - Volume 13, Issue 33 - article #9
- V. Adibekyan, P. Figueira, N. C. Santos, S. G. Sousa, J. P. Faria, E. Delgado-Mena, M. Oshagh, M. Tsantaki, A. A. Hakobyan, J. I. Gonzalez Hernandez, L. Suarez-Andres, G. Israelian
- arXiv.org - Astrophysics - Volume: 2015, Issue: 11 Sep
- arXiv:1509.02419 [pdf, other]
Determination of the spectroscopic stellar parameters for 257 field giant stars
- Virtual Journal - Volume 13, Issue 10 - article #5
- S. Alves, L. Benamati, N. C. Santos, V. Zh. Adibekyan, S. G. Sousa, G. Israelian, J. R. De Medeiros, C. Lovis, S. Udry
- arXiv.org - Astrophysics - Volume: 2015, Issue: 13 Mar
- arXiv:1503.02556 [pdf, ps, other]
Determination of the spectroscopic stellar parameters for 257 field giant stars
- Virtual Journal - Volume 13, Issue 10 - article #25
- S. Alves, L. Benamati, N. C. Santos, V. Zh. Adibekyan, S. G. Sousa, G. Israelian, J. R. De Medeiros, C. Lovis, and S. Udry
- Monthly Notices of the Royal Astronomical Society - Volume: 448, Issue: 3
- Abstract Full Text (HTML) Full Text (PDF)
Oxygen abundances in G- and F-type stars from HARPS
- Virtual Journal - Volume 13, Issue 4 - article #8
- S. Bertran de Lis, E. Delgado Mena, V. Zh. Adibekyan, N. C. Santos, S. G. Sousa
- arXiv.org - Astrophysics - Volume: 2015, Issue: 30 Jan
- arXiv:1501.05805 [pdf, ps, other]
Li abundances in F stars: planets, rotation and galactic evolution
- Virtual Journal - Volume 12, Issue 25 - article #17
- E. Delgado Mena, S. Bertrán de Lis, V. Zh. Adibekyan, S. G. Sousa, P. Figueira, A. Mortier, J. I. González Hernández, M. Tsantaki, G. Israelian, N. C. Santos
- arXiv.org - Astrophysics - Volume: 2014, Issue: 19 Dec
- arXiv:1412.4618 [pdf, ps, other]
Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
- Virtual Journal - Volume 12, Issue 22 - article #45
- R. Smiljanic, A. J. Korn, M. Bergemann, A. Frasca, L. Magrini, T. Masseron, E. Pancino, G. Ruchti, I. San Roman, L. Sbordone, S. G. Sousa, H. Tabernero, G. Tautvaisiene, M. Valentini, M. Weber, C. C. Worley, V. Zh. Adibekyan, C. Allende Prieto, G. Barisevicius, K. Biazzo, S. Blanco-Cuaresma, P. Bonifacio, A. Bragaglia, E. Caffau, T. Cantat-Gaudin, Y. Chorniy, P. de Laverny, E. Delgado-Mena, P. Donati, S. Duffau, E. Franciosini, E. Friel, D. Geisler, J. I. Gonzalez Hernandez, P. Gruyters, G. Guiglion, C. J. Hansen, U. Heiter, V. Hill, H. R. Jacobson, P. Jofre, H. Jonsson, A. C. Lanzafame, C. Lardo, H. G. Ludwig, E. Maiorca, S. Mikolaitis, D. Montes, T. Morel, A. Mucciarelli, C. Munoz, T. Nordlander, L. Pasquini, E. Puzeras, A. Recio-Blanco, N. Ryde, G. Sacco, N. C. Santos, A. M. Serenelli, et al. (43 additional authors not shown)
- arXiv.org - Astrophysics - Volume: 2014, Issue: 5 Sep
- arXiv:1409.0568 [pdf, other]
Metallicity of M dwarfs - IV. A high-precision [Fe/H] and T_eff technique from high-resolution optical spectra for M dwarfs
- Virtual Journal - Volume 12, Issue 22 - article #97
- V. Neves, X. Bonfils, N. C. Santos, X. Delfosse, T. Forveille, F. Allard and S. Udry
- Astronomy and Astrophysics - Volume: 568, Issue: August 2014
- http://dx.doi.org/10.1051/0004-6361/201424139
  Abstract Full HTML PDF (2.007 MB) ePUB (2.278 MB) References Online Material NASA ADS Abstract Service
Metallicity of M dwarfs IV. A high-precision [Fe/H] and Teff technique from high-resolution optical spectra for M dwarfs
- Virtual Journal - Volume 12, Issue 20 - article #92
- V. Neves (1,2,3), X. Bonfils (3,4), N. C. Santos (2), X. Delfosse (3,4), T. Forveille (3,4), F. Allard (5), S. Udry (6) ((1) Departamento de Física, Universidade Federal do Rio Grande do Norte, Brazil, (2) Centro de Astrofísica and Faculdade de Ciências, Universidade do Porto, Portugal, (3) Univ. Grenoble Alpes, IPAG, France, (4) CNRS, IPAG, France, (5) Centre de Recherche Astrophysique de Lyon, Université de Lyon, École Normale Supérieure de Lyon, France, (6) Observatoire de Genève, Université de Genève, Switzerland)
- arXiv.org - Astrophysics - Volume: 2014, Issue: 27 Jun
- arXiv:1406.6127 [pdf, ps, other]
Chemical abundances of stars with brown-dwarf companions
- Virtual Journal - Volume 12, Issue 14 - article #2
- D. Mata Sánchez, J. I. González Hernández, G. Israelian, N. C. Santos, J. Sahlmann, S. Udry
- arXiv.org - Astrophysics - Volume: 2014, Issue: 4 Apr
- arXiv:1404.0824 [pdf, ps, other]
Kinematics and chemical properties of the Galactic stellar populations - The HARPS FGK dwarfs sample
- Virtual Journal - Volume 11, Issue 26 - article #35
- V. Zh. Adibekyan, P. Figueira, N. C. Santos, A. A. Hakobyan, S. G. Sousa, G. Pace, E. Delgado Mena, A. C. Robin, G. Israelian and J. I. GonzÃƒÂ¡lez HernÃƒÂ¡ndez
- Astronomy and Astrophysics - Volume: 554, Issue: June 2013
- http://dx.doi.org/10.1051/0004-6361/201321520
  Abstract Full HTML PDF (782.6 KB) References NASA ADS Abstract Service
Deriving precise parameters for cool solar-type stars. Optimizing the iron line list
- Virtual Journal - Volume 11, Issue 17 - article #3
- M. Tsantaki, S. G. Sousa, V. Zh. Adibekyan, N. C. Santos, A. Mortier, G. Israelian
- arXiv.org - Astrophysics - Volume: 2013, Issue: 26 Apr
- arXiv:1304.6639 [pdf, other]
Kinematics and chemical properties of the Galactic stellar populations. The HARPS FGK dwarfs sample
- Virtual Journal - Volume 11, Issue 15 - article #7
- V. Zh. Adibekyan, P. Figueira, N. C. Santos, A. A. Hakobyan, S. G. Sousa, G. Pace, E. Delgado Mena, A. C. Robin, G. Israelian, J. I. Gonzalez Hernandez
- arXiv.org - Astrophysics - Volume: 2013, Issue: 12 Apr
- arXiv:1304.2561 [pdf, ps, other]
Searching for the signatures of terrestrial planets in F-, G-type main-sequence stars
- Virtual Journal - Volume 11, Issue 2 - article #15
- J. I. González Hernández, E. Delgado-Mena, S. G. Sousa, G. Israelian, N. C. Santos, V. Zh. Adibekyan, S. Udry
- arXiv.org - Astrophysics - Volume: 2013, Issue: 11 Jan
- arXiv:1301.2109 [pdf, ps, other]
Metallicity of M dwarfs III. Planet-metallicity and planet-stellar mass correlations of the HARPS GTO M dwarf sample
- Virtual Journal - Volume 10, Issue 51 - article #8
- V. Neves, X. Bonfils, N. C. Santos, X. Delfosse, T. Forveille, F. Allard, S. Udry
- arXiv.org - Astrophysics - Volume: 2012, Issue: 21 Dec
- arXiv:1212.3372 [pdf, ps, other]
TMCalc â€“ a fast code to derive Teff and [Fe/H] for FGK stars
- Virtual Journal - Volume 10, Issue 51 - article #58
- S. G. Sousa, N. C. Santos and G. Israelian
- Astronomy and Astrophysics - Volume: 544, Issue: August 2012
- http://dx.doi.org/10.1051/0004-6361/201219260
  Abstract | Full HTML | PDF (1.473 MB) | References | NASA ADS Abstract Service
Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program - Galactic stellar populations and planets
- Virtual Journal - Volume 10, Issue 51 - article #60
- V. Zh. Adibekyan, S. G. Sousa, N. C. Santos, E. Delgado Mena, J. I. GonzÃƒÂ¡lez HernÃƒÂ¡ndez, G. Israelian, M. Mayor and G. Khachatryan
- Astronomy and Astrophysics - Volume: 545, Issue: September 2012
- http://dx.doi.org/10.1051/0004-6361/201219401
  Abstract | Full HTML | PDF (5.789 MB) | References | Online Material | Tables at CDS | SIMBAD record | NASA ADS Abstract Service
TMCalc - A fast code to derive Teff and [Fe/H] for FGK stars
- Virtual Journal - Volume 10, Issue 36 - article #19
- Sérgio G. Sousa (1,2), Nuno C. Santos (1,3), Garik Israelian (2,4) ((1) Centro de Astrofísica, Universidade do Porto, (2) Instituto de Astrofísica de Canarias, (3) Departamento de Física e Astronomia, Faculdade de Ciências da Universidade do Porto, (4) Departamento de Astrofisica, Universidade de La Laguna)
- arXiv.org - Astrophysics - Volume: 2012, Issue: 7 Sep
- arXiv:1209.0342 [pdf, ps, other]
Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program
- Virtual Journal - Volume 10, Issue 28 - article #2
- V. Zh. Adibekyan, S. G. Sousa, N. C. Santos, E. Delgado Mena, J. I. Gonzalez Hernandez, G. Israelian, M. Mayor, G. Khachatryan
- arXiv.org - Astrophysics - Volume: 2012, Issue: 13 Jul
- arXiv:1207.2388 [pdf, other]
Abundance analysis of four members of the metal-rich open cluster NGC 6253
- Virtual Journal - Volume 10, Issue 27 - article #31
- M. Montalto, N. C. Santos, S. Villanova, G. Pace, G. Piotto, S. Desidera, F. De Marchi, L. Pasquini and I. Saviane
- Monthly Notices of the Royal Astronomical Society - Volume: 423, Issue: 4
- Abstract Full Article (HTML)PDF(967K)References Supporting Information Request Permissions
The frequency of giant planets around metal-poor stars
- Virtual Journal - Volume 10, Issue 20 - article #13
- A. Mortier, N. C. Santos, A. Sozzetti, M. Mayor, D. Latham, X. Bonfils, S. Udry
- arXiv.org - Astrophysics - Volume: 2012, Issue: 18 May
- arXiv:1205.3723 [pdf, ps, other]
Fluorine abundances in dwarf stars of the solar neighbourhood
- Virtual Journal - Volume 10, Issue 3 - article #4
- A. Recio-Blanco, P. de Laverny, C. Worley, N. C. Santos, C. Melo, G. Israelian
- arXiv.org - Astrophysics - Volume: 2012, Issue: 20 Jan
- arXiv:1201.3193 [pdf, ps, other]
A new alpha-enhanced super-solar metallicity population
- Virtual Journal - Volume 9, Issue 47 - article #1
- V. Zh. Adibekyan, N. C. Santos, S. G. Sousa, G. Israelian
- arXiv.org - Astrophysics - Volume: 2011, Issue: 24 Nov
- arXiv:1111.4936 [pdf, ps, other]
Be abundances in cool main-sequence stars with exoplanets
- Virtual Journal - Volume 9, Issue 46 - article #4
- E. Delgado Mena, G. Israelian, J. I. González Hernández, N. C. Santos, R. Rebolo
- arXiv.org - Astrophysics - Volume: 2011, Issue: 18 Nov
- arXiv:1111.3495 [pdf, ps, other]
Metallicity of M dwarfs II. A comparative study of photometric metallicity scales
- Virtual Journal - Volume 9, Issue 41 - article #11
- V. Neves, X. Bonfils, N. C. Santos, X. Delfosse, T. Forveille, F. Allard, C. Natário, C. S. Fernandes, S. Udry
- arXiv.org - Astrophysics - Volume: 2011, Issue: 14 Oct
- arXiv:1110.2694 [pdf, other]
Spectroscopic stellar parameters for 582 FGK stars in the HARPS volume-limited sample. Revising the metallicity-planet correlation
- Virtual Journal - Volume 9, Issue 35 - article #8
- Sérgio G. Sousa (1,2), Nuno C. Santos (1,3,4), Garik Israelian (2,5), Michel Mayor (3), Stephane Udry (3) ((1) Centro de Astrofísica, Universidade do Porto, (2) Instituto de Astrofísica de Canarias, (3) Geneva Observatory, Geneva University, (4) Departamento de Física e Astronomia, Faculdade de Ciências da Universidade do Porto, (5) Departamento de Astrofisica, Universidade de La Laguna)
- arXiv.org - Astrophysics - Volume: 2011, Issue: 2 Sep
- arXiv:1108.5279 [pdf, ps, other]
An Effective temperature calibration for solar type stars using equivalent width ratios - A fast and easy spectroscopic temperature estimation
- Virtual Journal - Volume 7, Issue 51 - article #4
- S. G. Sousa, A. Alapini, G. Israelian, N. C. Santos
- arXiv.org - Astrophysics - Volume: 2009, Issue: 18 Dec
- arXiv:0912.2651 [ps, pdf, other]
Chemical abundances of 451 stars from the HARPS GTO planet search program - Thin disc, thick disc, and planets
- Virtual Journal - Volume 7, Issue 15 - article #13
- V. Neves, N. C. Santos, S. G. Sousa, A. C. M. Correia, and G. Israelian
- Astronomy and Astrophysics - Volume: 497, Issue: 2
- Abstract | PDF file (1.175 MB) | PS file (1.730 MB)
Chemical abundances of 451 stars from the HARPS GTO planet search program: Thin disc, thick disc, and planets
- Virtual Journal - Volume 7, Issue 8 - article #4
- V. Neves, N. C. Santos, S. G. Sousa, A. C. M. Correia, G. Israelian
- arXiv.org - Astrophysics - Volume: 2009, Issue: 20 Feb
- arXiv:0902.3374 [ps, pdf, other]
Metallicities for 13 nearby open clusters from high-resolution spectroscopy of dwarf and giant stars - Stellar metallicity, stellar mass, and giant planets
- Virtual Journal - Volume 6, Issue 52 - article #17
- N. C. Santos, C. Lovis, G. Pace, J. Melendez, and D. Naef
- Astronomy and Astrophysics - Volume: 493, Issue: 1
- Abstract | PDF file (161.0 KB) | PS file (65.19 KB)
High resolution spectroscopy of stars with transiting planets - The cases of OGLE-TR-10, 56, 111, 113, and TrES-1
- Virtual Journal - Volume 4, Issue 15 - article #29
- N. C. Santos, F. Pont, C. Melo, G. Israelian, F. Bouchy, M. Mayor, C. Moutou, D. Queloz, S. Udry and T. Guillot
- Astronomy and Astrophysics - Volume 450, Issue 2 - April, 2006
- Abstract, Full HTML, PDF file (172 KB), PS file (68.8 KB), References
Abundance ratios of volatile vs. refractory elements in planet-harbouring stars: hints of pollution?
- Virtual Journal - Volume 4, Issue 13 - article #32
- A. Ecuvillon, G. Israelian, N. C. Santos, M. Mayor and G. Gilli
- Astronomy and Astrophysics - Volume 449, Issue 2 - March, 2006
- Abstract, Full HTML, PDF file (759 KB), PS file (530 KB), References
Abundances of refractory elements in the atmospheres of stars with extrasolar planets
- Virtual Journal - Volume 4, Issue 12 - article #34
- G. Gilli, G. Israelian, A. Ecuvillon, N. C. Santos and M. Mayor
- Astronomy and Astrophysics - Volume 449, Issue 2 - March, 2006
- Abstract, Full HTML, PDF file (691 KB), PS file (264 KB), References
Abundance ratios of volatile vs. refractory elements in planet-harbouring stars: hints of pollution?
- Virtual Journal - Volume 4, Issue 12 - article #35
- A. Ecuvillon, G. Israelian, N. C. Santos, M. Mayor and G. Gilli
- Astronomy and Astrophysics - Volume 449, Issue 2 - March, 2006
- Abstract, Full HTML, PDF file (759 KB), PS file (530 KB), References
On the nature of Lithium-rich giant stars: constraints from Beryllium abundances
- Virtual Journal - Volume 3, Issue 14 - article #18
- C. H. F. Melo, P. de Laverny, N. C. Santos, G. Israelian, S. Randich, J. D. do Nascimento Jr., J. R. De Medeiros
- arXiv - Astrophysics – April 2005
- astro-ph/0504133 [ abs , ps , pdf , other ]
C, S, Zn and Cu abundances in planet-harbouring stars
- Virtual Journal - Volume 2, Issue 41 - article #37
- A. Ecuvillon, G. Israelian, N. C. Santos, M. Mayor, V. Villar and G. Bihain
- Astronomy and Astrophysics – Vol 426, No 2 – October 2004
- Abstract , Full HTML, PDF file (530 KB) , PS file (195 KB) , References
Beryllium anomalies in solar-type field stars
- Virtual Journal - Volume 2, Issue 39 - article #52
- N. C. Santos, G. Israelian, S. Randich, R. J. GarcÃa LÃ³pez and R. Rebolo
- Astronomy and Astrophysics - Vol. 425 No. 3 – October 2004
- Abstract , Full HTML , PDF file (564 KB) , PS file (259 KB) , References
C, S, Zn and Cu abundances in planet-harbouring stars
- Virtual Journal - Volume 2, Issue 26 - article #32
- A. Ecuvillon (1), G. Israelian (1), N. C. Santos (2,3), M. Mayor (3), V. Villar (4), G. Bihain (1) ((1)Instituto de Astrofisica de Canarias, Spain, (2) Observatorio Astronomico de Lisboa, Portugal, (3) Observatoire de Geneve, Switzerland, (4) Universidad Complutense de Madrid, Spain)
- arXiv - Astrophysics – July 04
- astro-ph/0406584 [ abs , ps , pdf , other ]
Lithium in stars with exoplanets
- Virtual Journal - Volume 2, Issue 2 - article #30
- G. Israelian, N. C. Santos, M. Mayor and R. Rebolo
- Astronomy and Astrophysics - Vol. 414 No. 2
- Abstract , Full HTML, PDF file (330 KB) , PS file (135 KB)
Spectroscopic [Fe/H] for 98 extra-solar planet-host stars: Exploring the probability of planet formation
- Virtual Journal - Volume 1, Issue 20 - article #13
- N. C. Santos(1 and 2), G. Israelian(3), M. Mayor(2) ((1) Observatorio Astronomico de Lisboa, Portugal (2) Observatoire de Geneve, Switzerland (3) Instituto de Astrofisia de Canarias, Spain)
- arXiv.org - Astrophysics - Tue, 25 Nov 2003
- astro-ph/0311541 [ abs , ps , pdf , other ]

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