VizieR Online Data Catalog: s-process enhanced stars in the LAMOST survey (Norfolk+, 2019)

B. J. Norfolk; Andrew R. Casey; Amanda I. Karakas; M. T. Miles; A. J. Kemp; K. C. Schlaufman; M. Ness; A. Y. Q. Ho; J. C. Lattanzio; Alexander p.Ji

VizieR Online Data Catalog: s-process enhanced stars in the LAMOST survey (Norfolk+, 2019)

B. J. Norfolk
, Andrew R. Casey
, Amanda I. Karakas
, M. T. Miles
, A. J. Kemp
, K. C. Schlaufman
, M. Ness
, A. Y. Q. Ho
, J. C. Lattanzio
, Alexander p.Ji

Research School of Astronomy & Astrophysics

Research output: Contribution to journal › Article › peer-review

Abstract

The LAMOST survey released low-resolution (R~1800) optical spectra (3700-9000Å) for 2207189 stars in their second data release (Bai et al. 2016RAA....16..107B). For details regarding the LAMOST atmospheric parameters and error analysis, we direct the reader to the LAMOST Stellar Parameter pipeline (Wu et al. 2011RAA....11..924W, Cat. J/other/RAA/11.924, 2011A&A...525A..71W, Cat. J/A+A/525/A71). Stellar parameters and abundances (T_eff, logg, [M/H], [α/M]) were derived by Ho et al. (2017ApJ...836....5H, Cat. J/ApJ/836/5) using The Cannon (Ness et al. 2015ApJ...808...16N, Cat. J/ApJ/808/16, 2016ApJ...823..114N, Cat. J/ApJ/823/114; Casey et al. 2016arXiv160303040C).

The s-process-rich candidates in this work were identified by filtering for significant flux residuals at the Sr and Ba lines. We fit a Gaussian function with amplitude A to the residuals of the observed flux and the data-driven model from The Cannon at wavelengths 4554Å (BaII) and 4077Å (SrII) for s-process-rich candidates, at wavelengths 4554Å (BaII) and 4934Å (BaII) for Ba-enriched candidates, and at wavelengths 4077Å (SrII) and 4215Å (SrII) for Sr-enriched candidates.

Five criteria detailed in Section 2 of the article were used for each spectrum in order to identify potential s-process enrichment. This approach yielded 895 candidates, out of which 871 have positive parallaxes and parallax S/N of five or above in Gaia DR2 (Gaia Collaboration, 2018A&A...616A...1G, Cat. I/345). Properties of these candidates are presented in Table 1.

(1 data file).

Original language	English
Number of pages	9
Journal	Advances in Decision Sciences
Volume	490
Publication status	Published - 1 Jan 2023

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https://ui.adsabs.harvard.edu/abs/2023yCat..74902219N

Cite this

@article{d8ff00f958cd4ea3905eb245bdecf0f4,

title = "VizieR Online Data Catalog: s-process enhanced stars in the LAMOST survey (Norfolk+, 2019)",

abstract = "The LAMOST survey released low-resolution (R\textasciitilde{}1800) optical spectra (3700-9000{\AA}) for 2207189 stars in their second data release (Bai et al. 2016RAA....16..107B). For details regarding the LAMOST atmospheric parameters and error analysis, we direct the reader to the LAMOST Stellar Parameter pipeline (Wu et al. 2011RAA....11..924W, Cat. J/other/RAA/11.924, 2011A\&A...525A..71W, Cat. J/A+A/525/A71). Stellar parameters and abundances (Teff, logg, [M/H], [α/M]) were derived by Ho et al. (2017ApJ...836....5H, Cat. J/ApJ/836/5) using The Cannon (Ness et al. 2015ApJ...808...16N, Cat. J/ApJ/808/16, 2016ApJ...823..114N, Cat. J/ApJ/823/114; Casey et al. 2016arXiv160303040C). The s-process-rich candidates in this work were identified by filtering for significant flux residuals at the Sr and Ba lines. We fit a Gaussian function with amplitude A to the residuals of the observed flux and the data-driven model from The Cannon at wavelengths 4554{\AA} (BaII) and 4077{\AA} (SrII) for s-process-rich candidates, at wavelengths 4554{\AA} (BaII) and 4934{\AA} (BaII) for Ba-enriched candidates, and at wavelengths 4077{\AA} (SrII) and 4215{\AA} (SrII) for Sr-enriched candidates. Five criteria detailed in Section 2 of the article were used for each spectrum in order to identify potential s-process enrichment. This approach yielded 895 candidates, out of which 871 have positive parallaxes and parallax S/N of five or above in Gaia DR2 (Gaia Collaboration, 2018A\&A...616A...1G, Cat. I/345). Properties of these candidates are presented in Table 1. (1 data file).",

keywords = "Stars: giant, Stars: peculiar, Abundances: peculiar, Positional data, Parallaxes: trigonometric, Proper motions, Radial velocities, Space velocities, Effective temperatures, Optical",

author = "Norfolk, \{B. J.\} and Casey, \{Andrew R.\} and \{I. Karakas\}, Amanda and Miles, \{M. T.\} and Kemp, \{A. J.\} and Schlaufman, \{K. C.\} and M. Ness and Ho, \{A. Y. Q.\} and Lattanzio, \{J. C.\} and Alexander p.Ji",

note = " C 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society ",

year = "2023",

month = jan,

day = "1",

language = "English",

volume = "490",

journal = "Advances in Decision Sciences",

issn = "2090-3359",

publisher = "Asia University",

}

TY - JOUR

T1 - VizieR Online Data Catalog: s-process enhanced stars in the LAMOST survey (Norfolk+, 2019)

AU - Norfolk, B. J.

AU - Casey, Andrew R.

AU - I. Karakas, Amanda

AU - Miles, M. T.

AU - Kemp, A. J.

AU - Schlaufman, K. C.

AU - Ness, M.

AU - Ho, A. Y. Q.

AU - Lattanzio, J. C.

AU - p.Ji, Alexander

N1 - C 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

PY - 2023/1/1

Y1 - 2023/1/1

N2 - The LAMOST survey released low-resolution (R~1800) optical spectra (3700-9000Å) for 2207189 stars in their second data release (Bai et al. 2016RAA....16..107B). For details regarding the LAMOST atmospheric parameters and error analysis, we direct the reader to the LAMOST Stellar Parameter pipeline (Wu et al. 2011RAA....11..924W, Cat. J/other/RAA/11.924, 2011A&A...525A..71W, Cat. J/A+A/525/A71). Stellar parameters and abundances (Teff, logg, [M/H], [α/M]) were derived by Ho et al. (2017ApJ...836....5H, Cat. J/ApJ/836/5) using The Cannon (Ness et al. 2015ApJ...808...16N, Cat. J/ApJ/808/16, 2016ApJ...823..114N, Cat. J/ApJ/823/114; Casey et al. 2016arXiv160303040C). The s-process-rich candidates in this work were identified by filtering for significant flux residuals at the Sr and Ba lines. We fit a Gaussian function with amplitude A to the residuals of the observed flux and the data-driven model from The Cannon at wavelengths 4554Å (BaII) and 4077Å (SrII) for s-process-rich candidates, at wavelengths 4554Å (BaII) and 4934Å (BaII) for Ba-enriched candidates, and at wavelengths 4077Å (SrII) and 4215Å (SrII) for Sr-enriched candidates. Five criteria detailed in Section 2 of the article were used for each spectrum in order to identify potential s-process enrichment. This approach yielded 895 candidates, out of which 871 have positive parallaxes and parallax S/N of five or above in Gaia DR2 (Gaia Collaboration, 2018A&A...616A...1G, Cat. I/345). Properties of these candidates are presented in Table 1. (1 data file).

AB - The LAMOST survey released low-resolution (R~1800) optical spectra (3700-9000Å) for 2207189 stars in their second data release (Bai et al. 2016RAA....16..107B). For details regarding the LAMOST atmospheric parameters and error analysis, we direct the reader to the LAMOST Stellar Parameter pipeline (Wu et al. 2011RAA....11..924W, Cat. J/other/RAA/11.924, 2011A&A...525A..71W, Cat. J/A+A/525/A71). Stellar parameters and abundances (Teff, logg, [M/H], [α/M]) were derived by Ho et al. (2017ApJ...836....5H, Cat. J/ApJ/836/5) using The Cannon (Ness et al. 2015ApJ...808...16N, Cat. J/ApJ/808/16, 2016ApJ...823..114N, Cat. J/ApJ/823/114; Casey et al. 2016arXiv160303040C). The s-process-rich candidates in this work were identified by filtering for significant flux residuals at the Sr and Ba lines. We fit a Gaussian function with amplitude A to the residuals of the observed flux and the data-driven model from The Cannon at wavelengths 4554Å (BaII) and 4077Å (SrII) for s-process-rich candidates, at wavelengths 4554Å (BaII) and 4934Å (BaII) for Ba-enriched candidates, and at wavelengths 4077Å (SrII) and 4215Å (SrII) for Sr-enriched candidates. Five criteria detailed in Section 2 of the article were used for each spectrum in order to identify potential s-process enrichment. This approach yielded 895 candidates, out of which 871 have positive parallaxes and parallax S/N of five or above in Gaia DR2 (Gaia Collaboration, 2018A&A...616A...1G, Cat. I/345). Properties of these candidates are presented in Table 1. (1 data file).

KW - Stars: giant

KW - Stars: peculiar

KW - Abundances: peculiar

KW - Positional data

KW - Parallaxes: trigonometric

KW - Proper motions

KW - Radial velocities

KW - Space velocities

KW - Effective temperatures

KW - Optical

M3 - Article

SN - 2090-3359

VL - 490

JO - Advances in Decision Sciences

JF - Advances in Decision Sciences

ER -

VizieR Online Data Catalog: s-process enhanced stars in the LAMOST survey (Norfolk+, 2019)

Abstract

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