Pristine IX: CFHT ESPaDOnS Spectroscopic Analysis of 115 Bright Metal-Poor Candidate Stars

Kim Venn; Collin Kielty; Federico Sestito; Else Starkenburg; Nicolas Martin; David S. Aguado; Anke Arentsen; Piercarlo Bonifacio; Elisabetta Caffau; Vanessa Hill; Pascale Jablonka; Carmela Lardo; Lyudmilla Mashonkina; Julio F. Navarro; Chris Sneden; Guillaume Thomas; Kris Youakim; Jonay I. Gonzalez-Hernandez; Ruben Sanchez Janssen; Ray Carlberg; Khyati Malhan

doi:10.1093/mnras/stz3546

Pristine IX: CFHT ESPaDOnS Spectroscopic Analysis of 115 Bright Metal-Poor Candidate Stars

Kim Venn, Collin Kielty, Federico Sestito, Else Starkenburg, Nicolas Martin, David S. Aguado, Anke Arentsen, Piercarlo Bonifacio, Elisabetta Caffau, Vanessa Hill, Pascale Jablonka, Carmela Lardo, Lyudmilla Mashonkina, Julio F. Navarro, Chris Sneden, Guillaume Thomas, Kris Youakim, Jonay I. Gonzalez-Hernandez, Ruben Sanchez Janssen, Ray CarlbergKhyati Malhan

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Abstract

A chemo-dynamical analysis of 115 metal-poor candidate stars selected from the narrow-band Pristine photometric survey is presented based on CFHT high-resolution ESPaDoNS spectroscopy. We have discover 28 new bright (V < 15) stars with [Fe/H]0, and a metal-poor star with very low [Mg/Fe]. The kinematics and orbits for all of the highly probable metal-poor candidates are determined by combining our precision radial velocities with Gaia DR2 proper motions. Some stars show unusual kinematics for their chemistries, including planar orbits, unbound orbits, and highly elliptical orbits that plunge deeply into the Galactic bulge (Rperi < 0.5 kpc); also, eight stars have orbital energies and actions consistent with the Gaia-Enceladus accretion event. This paper contributes to our understanding of the complex chemo-dynamics of the metal-poor Galaxy, and increases the number of known bright metal-poor stars available for detailed nucleosynthetic studies.

Original language	Undefined/Unknown
Journal	Monthly Notices of the Royal Astronomical Society
DOIs	https://doi.org/10.1093/mnras/stz3546
Publication status	Published - 14 Oct 2019

Keywords

astro-ph.SR
astro-ph.GA

Access to Document

10.1093/mnras/stz3546

1910.06340v1

Cite this

Venn, K., Kielty, C., Sestito, F., Starkenburg, E., Martin, N., Aguado, D. S., Arentsen, A., Bonifacio, P., Caffau, E., Hill, V., Jablonka, P., Lardo, C., Mashonkina, L., Navarro, J. F., Sneden, C., Thomas, G., Youakim, K., Gonzalez-Hernandez, J. I., Janssen, R. S., ... Malhan, K. (2019). Pristine IX: CFHT ESPaDOnS Spectroscopic Analysis of 115 Bright Metal-Poor Candidate Stars. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1093/mnras/stz3546

@article{ee21c97f5b694d44971b272a4397a0b4,

title = "Pristine IX: CFHT ESPaDOnS Spectroscopic Analysis of 115 Bright Metal-Poor Candidate Stars",

abstract = " A chemo-dynamical analysis of 115 metal-poor candidate stars selected from the narrow-band Pristine photometric survey is presented based on CFHT high-resolution ESPaDoNS spectroscopy. We have discover 28 new bright (V < 15) stars with [Fe/H]0, and a metal-poor star with very low [Mg/Fe]. The kinematics and orbits for all of the highly probable metal-poor candidates are determined by combining our precision radial velocities with Gaia DR2 proper motions. Some stars show unusual kinematics for their chemistries, including planar orbits, unbound orbits, and highly elliptical orbits that plunge deeply into the Galactic bulge (Rperi < 0.5 kpc); also, eight stars have orbital energies and actions consistent with the Gaia-Enceladus accretion event. This paper contributes to our understanding of the complex chemo-dynamics of the metal-poor Galaxy, and increases the number of known bright metal-poor stars available for detailed nucleosynthetic studies. ",

keywords = "astro-ph.SR, astro-ph.GA",

author = "Kim Venn and Collin Kielty and Federico Sestito and Else Starkenburg and Nicolas Martin and Aguado, {David S.} and Anke Arentsen and Piercarlo Bonifacio and Elisabetta Caffau and Vanessa Hill and Pascale Jablonka and Carmela Lardo and Lyudmilla Mashonkina and Navarro, {Julio F.} and Chris Sneden and Guillaume Thomas and Kris Youakim and Gonzalez-Hernandez, {Jonay I.} and Janssen, {Ruben Sanchez} and Ray Carlberg and Khyati Malhan",

note = "Submitted to MNRAS, 19 pages (22 figures), and 7 tables",

year = "2019",

month = oct,

day = "14",

doi = "10.1093/mnras/stz3546",

language = "Undefined/Unknown",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press (OUP)",

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Venn, K, Kielty, C, Sestito, F, Starkenburg, E, Martin, N, Aguado, DS, Arentsen, A, Bonifacio, P, Caffau, E, Hill, V, Jablonka, P, Lardo, C, Mashonkina, L, Navarro, JF, Sneden, C, Thomas, G, Youakim, K, Gonzalez-Hernandez, JI, Janssen, RS, Carlberg, R & Malhan, K 2019, 'Pristine IX: CFHT ESPaDOnS Spectroscopic Analysis of 115 Bright Metal-Poor Candidate Stars', Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1093/mnras/stz3546

TY - JOUR

T1 - Pristine IX

T2 - CFHT ESPaDOnS Spectroscopic Analysis of 115 Bright Metal-Poor Candidate Stars

AU - Venn, Kim

AU - Kielty, Collin

AU - Sestito, Federico

AU - Starkenburg, Else

AU - Martin, Nicolas

AU - Aguado, David S.

AU - Arentsen, Anke

AU - Bonifacio, Piercarlo

AU - Caffau, Elisabetta

AU - Hill, Vanessa

AU - Jablonka, Pascale

AU - Lardo, Carmela

AU - Mashonkina, Lyudmilla

AU - Navarro, Julio F.

AU - Sneden, Chris

AU - Thomas, Guillaume

AU - Youakim, Kris

AU - Gonzalez-Hernandez, Jonay I.

AU - Janssen, Ruben Sanchez

AU - Carlberg, Ray

AU - Malhan, Khyati

N1 - Submitted to MNRAS, 19 pages (22 figures), and 7 tables

PY - 2019/10/14

Y1 - 2019/10/14

N2 - A chemo-dynamical analysis of 115 metal-poor candidate stars selected from the narrow-band Pristine photometric survey is presented based on CFHT high-resolution ESPaDoNS spectroscopy. We have discover 28 new bright (V < 15) stars with [Fe/H]0, and a metal-poor star with very low [Mg/Fe]. The kinematics and orbits for all of the highly probable metal-poor candidates are determined by combining our precision radial velocities with Gaia DR2 proper motions. Some stars show unusual kinematics for their chemistries, including planar orbits, unbound orbits, and highly elliptical orbits that plunge deeply into the Galactic bulge (Rperi < 0.5 kpc); also, eight stars have orbital energies and actions consistent with the Gaia-Enceladus accretion event. This paper contributes to our understanding of the complex chemo-dynamics of the metal-poor Galaxy, and increases the number of known bright metal-poor stars available for detailed nucleosynthetic studies.

AB - A chemo-dynamical analysis of 115 metal-poor candidate stars selected from the narrow-band Pristine photometric survey is presented based on CFHT high-resolution ESPaDoNS spectroscopy. We have discover 28 new bright (V < 15) stars with [Fe/H]0, and a metal-poor star with very low [Mg/Fe]. The kinematics and orbits for all of the highly probable metal-poor candidates are determined by combining our precision radial velocities with Gaia DR2 proper motions. Some stars show unusual kinematics for their chemistries, including planar orbits, unbound orbits, and highly elliptical orbits that plunge deeply into the Galactic bulge (Rperi < 0.5 kpc); also, eight stars have orbital energies and actions consistent with the Gaia-Enceladus accretion event. This paper contributes to our understanding of the complex chemo-dynamics of the metal-poor Galaxy, and increases the number of known bright metal-poor stars available for detailed nucleosynthetic studies.

KW - astro-ph.SR

KW - astro-ph.GA

U2 - 10.1093/mnras/stz3546

DO - 10.1093/mnras/stz3546

M3 - Article

SN - 0035-8711

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

ER -