Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Masseron, Thomas"'
Autor:
McCormick, Caroline, Majewski, Steven R., Smith, Verne V., Hayes, Christian R., Cunha, Katia, Masseron, Thomas, Weiss, Achim, Shetrone, Matthew, Almeida, Andrés, Frinchaboy, Peter M., García-Hernández, Domingo Aníbal, Nitschelm, Christian
Standard stellar evolution theory poorly predicts the surface abundances of chemical species in low-mass, red giant branch (RGB) stars. Observations show an enhancement of p-p chain and CNO cycle products in red giant envelopes, which suggests the ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ef9076982d0e49f18c46b977888fa51
http://arxiv.org/abs/2307.11191
http://arxiv.org/abs/2307.11191
Autor:
Wanderley, Fábio, Cunha, Katia, Souto, Diogo, Smith, Verne V., Cao, Lyra, Pinsonneault, Marc, Prieto, C. Allende, Covey, Kevin, Masseron, Thomas, Pascucci, Ilaria, Stassun, Keivan G., Terrien, Ryan, Bergsten, Galen J., Bizyaev, Dmitry, Fernández-Trincado, José G., Jönsson, Henrik, Hasselquist, Sten, Holtzman, Jon A., Lane, Richard R., Mahadevan, Suvrath, Majewski, Steven R., Minniti, Dante, Pan, Kaike, Serna, Javier, Sobeck, Jennifer, Stringfellow, Guy S.
We present a spectroscopic analysis of a sample of 48 M dwarf stars ($0.2 M_{\odot}< M < 0.6 M_{\odot}$) from the Hyades open cluster using high-resolution H-band spectra from the SDSS/APOGEE survey. Our methodology adopts spectrum synthesis with LTE
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b9f8bc7d21e686091cdf3b6dd515cb9
http://arxiv.org/abs/2305.07065
http://arxiv.org/abs/2305.07065
We continue our series of papers on phase-space distributions of stars in the Milky Way based on photometrically derived metallicities and Gaia astrometry, with a focus on the halo-disk interface in the local volume. To exploit various photometric da
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b559d33a07041f5f03eb795c5d96eb78
http://arxiv.org/abs/2210.07542
http://arxiv.org/abs/2210.07542
Autor:
M��sz��ros, Szabolcs, Masseron, Thomas, Fern��ndez-Trincado, Jos�� G., Garc��a-Hern��ndez, D. A., Szigeti, L��szl��, Cunha, Katia, Shetrone, Matthew, Smith, Verne V., Beaton, Rachael L., Beers, Timothy C., Brownstein, Joel R., Geisler, Doug, Hayes, Christian R., J��nsson, Henrik, Lane, Richard R., Majewski, Steven R., Minniti, Dante, Munoz, Ricardo R., Nitschelm, Christian, Roman-Lopes, Alexandre, Zamora, Olga
We study the multiple populations of $��$ Cen by using the abundances of Fe, C, N, O, Mg, Al, Si, K, Ca, and Ce from the high-resolution, high signal-to-noise (S/N$>$70) spectra of 982 red giant stars observed by the SDSS-IV/APOGEE-2 survey. We f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38f56a8e7e042ed9558ea0cf3931ab88
Autor:
Blanco-Cuaresma, Sergi, Nordlander, Thomas, Heiter, Ulrike, Jofré, Paula, Masseron, Thomas, Casamiquela, Laia, Tabernero, Hugo M., Bhat, Shruthi S., Casey, Andrew R., Meléndez, Jorge, Ramírez, Ivan
Publikováno v:
Highlights on Spanish Astrophysics IX
The determination of atmospheric parameters depends on the use of radiative transfer codes (among other elements such as model atmospheres) to compute synthetic spectra and/or derive abundances from equivalent widths. However, it is common to mix res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca42020f5d6f9d90670120b8090df8ea
http://arxiv.org/abs/1609.08092
http://arxiv.org/abs/1609.08092
Nucleosynthesis in a Primordial Supernova: Carbon and Oxygen Abundances in SMSS J031300.36-670839.31
Autor:
Bessell, Michael, Collett, Remo, Keller, Stefan, Frebel, Anna, Heger, Alexander, Casey, Andrew, Masseron, Thomas, Asplund, Martin, Jacobson, Heather, Lind, Karin, Marino, Anna, Norris, John, Yong, David, Da Costa, Gary, Chan, Conrad, Magic, Zazralt, Schmidt, Brian, Tisserand, Patrick
SMSS J031300.36-670839.3 (hereafter SM0313-6708) is a sub-giant halo star, with no detectable Fe lines and large overabundances of C and Mg relative to Ca. We obtained VLT-UVES spectra extending to 3060 Angstroms showing strong OH A-X band lines enab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df50c260606188c8bacdcc0cba7b72d1
We study the ages of $��$-rich and $��$-poor stars in the halo using a sample of F and G dwarfs from the Sloan Digital Sky Survey (SDSS). To separate stars based on [$��$/Fe], we have developed a new semi-empirical spectral-index based me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2661c6653475a8dafc8fca087e39819c