The open cluster chemical analysis and mapping survey: Local galactic metallicity gradient with apogee using SDSS DR10

Peter M. Frinchaboy, Benjamin Thompson, Kelly M. Jackson, Julia O'Connell, Brianne Meyer, Gail Zasowski, Steven R. Majewski, S. Drew Chojnowksi, Jennifer A. Johnson, Carlos Allende Prieto, Timothy C. Beers, Dmitry Bizyaev, Howard Brewington, Katia Cunha, Garrett Ebelke, Ana Elia García Pérez, Frederick R. Hearty, Jon Holtzman, Karen Kinemuchi, Elena MalanushenkoViktor Malanushenko, Moses Marchante, Szabolcs Mészáros, Demitri Muna, David L. Nidever, Daniel Oravetz, Kaike Pan, Ricardo P. Schiavon, Donald P. Schneider, Matthew Shetrone, Audrey Simmons, Stephanie Snedden, Verne V. Smith, John C. Wilson

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

The Open Cluster Chemical Analysis and Mapping (OCCAM) survey aims to produce a comprehensive, uniform, infrared-based data set for hundreds of open clusters, and constrain key Galactic dynamical and chemical parameters from this sample. This first contribution from the OCCAM survey presents analysis of 141 members stars in 28 open clusters with high-resolution metallicities derived from a large uniform sample collected as part of the Sloan Digital Sky Survey III/Apache Point Observatory Galactic Evolution Experiment. This sample includes the first high-resolution metallicity measurements for 22 open clusters. With this largest ever uniformly observed sample of open cluster stars we investigate the Galactic disk gradients of both [M/H] and [α/M]. We find basically no gradient in [α/M] across 7.9 kpc ≤ R GC ≤ 14.5 kpc, but [M/H] does show a gradient for R GC < 10 kpc and a significant flattening beyond R GC = 10 kpc. In particular, whereas fitting a single linear trend yields an [M/H] gradient of -0.09 ± 0.03 dex kpc -1 - similar to previously measure gradients inside 13 kpc - by independently fitting inside and outside 10 kpc separately we find a significantly steeper gradient near the Sun (7.9 ≤ R GC ≤ 10) than previously found (-0.20 ± 0.08 dex kpc-1) and a nearly flat trend beyond 10 kpc (-0.02 ± 0.09 dex kpc-1).

Original languageEnglish (US)
Article numberL1
JournalAstrophysical Journal Letters
Volume777
Issue number1
DOIs
StatePublished - Nov 1 2013

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open clusters
chemical analysis
metallicity
gradients
observatory
trends
stars
high resolution
galactic evolution
flattening
observatories
sun
experiment
trend

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Frinchaboy, P. M., Thompson, B., Jackson, K. M., O'Connell, J., Meyer, B., Zasowski, G., ... Wilson, J. C. (2013). The open cluster chemical analysis and mapping survey: Local galactic metallicity gradient with apogee using SDSS DR10. Astrophysical Journal Letters, 777(1), [L1]. https://doi.org/10.1088/2041-8205/777/1/L1
Frinchaboy, Peter M. ; Thompson, Benjamin ; Jackson, Kelly M. ; O'Connell, Julia ; Meyer, Brianne ; Zasowski, Gail ; Majewski, Steven R. ; Chojnowksi, S. Drew ; Johnson, Jennifer A. ; Allende Prieto, Carlos ; Beers, Timothy C. ; Bizyaev, Dmitry ; Brewington, Howard ; Cunha, Katia ; Ebelke, Garrett ; García Pérez, Ana Elia ; Hearty, Frederick R. ; Holtzman, Jon ; Kinemuchi, Karen ; Malanushenko, Elena ; Malanushenko, Viktor ; Marchante, Moses ; Mészáros, Szabolcs ; Muna, Demitri ; Nidever, David L. ; Oravetz, Daniel ; Pan, Kaike ; Schiavon, Ricardo P. ; Schneider, Donald P. ; Shetrone, Matthew ; Simmons, Audrey ; Snedden, Stephanie ; Smith, Verne V. ; Wilson, John C. / The open cluster chemical analysis and mapping survey : Local galactic metallicity gradient with apogee using SDSS DR10. In: Astrophysical Journal Letters. 2013 ; Vol. 777, No. 1.
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abstract = "The Open Cluster Chemical Analysis and Mapping (OCCAM) survey aims to produce a comprehensive, uniform, infrared-based data set for hundreds of open clusters, and constrain key Galactic dynamical and chemical parameters from this sample. This first contribution from the OCCAM survey presents analysis of 141 members stars in 28 open clusters with high-resolution metallicities derived from a large uniform sample collected as part of the Sloan Digital Sky Survey III/Apache Point Observatory Galactic Evolution Experiment. This sample includes the first high-resolution metallicity measurements for 22 open clusters. With this largest ever uniformly observed sample of open cluster stars we investigate the Galactic disk gradients of both [M/H] and [α/M]. We find basically no gradient in [α/M] across 7.9 kpc ≤ R GC ≤ 14.5 kpc, but [M/H] does show a gradient for R GC < 10 kpc and a significant flattening beyond R GC = 10 kpc. In particular, whereas fitting a single linear trend yields an [M/H] gradient of -0.09 ± 0.03 dex kpc -1 - similar to previously measure gradients inside 13 kpc - by independently fitting inside and outside 10 kpc separately we find a significantly steeper gradient near the Sun (7.9 ≤ R GC ≤ 10) than previously found (-0.20 ± 0.08 dex kpc-1) and a nearly flat trend beyond 10 kpc (-0.02 ± 0.09 dex kpc-1).",
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Frinchaboy, PM, Thompson, B, Jackson, KM, O'Connell, J, Meyer, B, Zasowski, G, Majewski, SR, Chojnowksi, SD, Johnson, JA, Allende Prieto, C, Beers, TC, Bizyaev, D, Brewington, H, Cunha, K, Ebelke, G, García Pérez, AE, Hearty, FR, Holtzman, J, Kinemuchi, K, Malanushenko, E, Malanushenko, V, Marchante, M, Mészáros, S, Muna, D, Nidever, DL, Oravetz, D, Pan, K, Schiavon, RP, Schneider, DP, Shetrone, M, Simmons, A, Snedden, S, Smith, VV & Wilson, JC 2013, 'The open cluster chemical analysis and mapping survey: Local galactic metallicity gradient with apogee using SDSS DR10', Astrophysical Journal Letters, vol. 777, no. 1, L1. https://doi.org/10.1088/2041-8205/777/1/L1

The open cluster chemical analysis and mapping survey : Local galactic metallicity gradient with apogee using SDSS DR10. / Frinchaboy, Peter M.; Thompson, Benjamin; Jackson, Kelly M.; O'Connell, Julia; Meyer, Brianne; Zasowski, Gail; Majewski, Steven R.; Chojnowksi, S. Drew; Johnson, Jennifer A.; Allende Prieto, Carlos; Beers, Timothy C.; Bizyaev, Dmitry; Brewington, Howard; Cunha, Katia; Ebelke, Garrett; García Pérez, Ana Elia; Hearty, Frederick R.; Holtzman, Jon; Kinemuchi, Karen; Malanushenko, Elena; Malanushenko, Viktor; Marchante, Moses; Mészáros, Szabolcs; Muna, Demitri; Nidever, David L.; Oravetz, Daniel; Pan, Kaike; Schiavon, Ricardo P.; Schneider, Donald P.; Shetrone, Matthew; Simmons, Audrey; Snedden, Stephanie; Smith, Verne V.; Wilson, John C.

In: Astrophysical Journal Letters, Vol. 777, No. 1, L1, 01.11.2013.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The open cluster chemical analysis and mapping survey

T2 - Local galactic metallicity gradient with apogee using SDSS DR10

AU - Frinchaboy, Peter M.

AU - Thompson, Benjamin

AU - Jackson, Kelly M.

AU - O'Connell, Julia

AU - Meyer, Brianne

AU - Zasowski, Gail

AU - Majewski, Steven R.

AU - Chojnowksi, S. Drew

AU - Johnson, Jennifer A.

AU - Allende Prieto, Carlos

AU - Beers, Timothy C.

AU - Bizyaev, Dmitry

AU - Brewington, Howard

AU - Cunha, Katia

AU - Ebelke, Garrett

AU - García Pérez, Ana Elia

AU - Hearty, Frederick R.

AU - Holtzman, Jon

AU - Kinemuchi, Karen

AU - Malanushenko, Elena

AU - Malanushenko, Viktor

AU - Marchante, Moses

AU - Mészáros, Szabolcs

AU - Muna, Demitri

AU - Nidever, David L.

AU - Oravetz, Daniel

AU - Pan, Kaike

AU - Schiavon, Ricardo P.

AU - Schneider, Donald P.

AU - Shetrone, Matthew

AU - Simmons, Audrey

AU - Snedden, Stephanie

AU - Smith, Verne V.

AU - Wilson, John C.

PY - 2013/11/1

Y1 - 2013/11/1

N2 - The Open Cluster Chemical Analysis and Mapping (OCCAM) survey aims to produce a comprehensive, uniform, infrared-based data set for hundreds of open clusters, and constrain key Galactic dynamical and chemical parameters from this sample. This first contribution from the OCCAM survey presents analysis of 141 members stars in 28 open clusters with high-resolution metallicities derived from a large uniform sample collected as part of the Sloan Digital Sky Survey III/Apache Point Observatory Galactic Evolution Experiment. This sample includes the first high-resolution metallicity measurements for 22 open clusters. With this largest ever uniformly observed sample of open cluster stars we investigate the Galactic disk gradients of both [M/H] and [α/M]. We find basically no gradient in [α/M] across 7.9 kpc ≤ R GC ≤ 14.5 kpc, but [M/H] does show a gradient for R GC < 10 kpc and a significant flattening beyond R GC = 10 kpc. In particular, whereas fitting a single linear trend yields an [M/H] gradient of -0.09 ± 0.03 dex kpc -1 - similar to previously measure gradients inside 13 kpc - by independently fitting inside and outside 10 kpc separately we find a significantly steeper gradient near the Sun (7.9 ≤ R GC ≤ 10) than previously found (-0.20 ± 0.08 dex kpc-1) and a nearly flat trend beyond 10 kpc (-0.02 ± 0.09 dex kpc-1).

AB - The Open Cluster Chemical Analysis and Mapping (OCCAM) survey aims to produce a comprehensive, uniform, infrared-based data set for hundreds of open clusters, and constrain key Galactic dynamical and chemical parameters from this sample. This first contribution from the OCCAM survey presents analysis of 141 members stars in 28 open clusters with high-resolution metallicities derived from a large uniform sample collected as part of the Sloan Digital Sky Survey III/Apache Point Observatory Galactic Evolution Experiment. This sample includes the first high-resolution metallicity measurements for 22 open clusters. With this largest ever uniformly observed sample of open cluster stars we investigate the Galactic disk gradients of both [M/H] and [α/M]. We find basically no gradient in [α/M] across 7.9 kpc ≤ R GC ≤ 14.5 kpc, but [M/H] does show a gradient for R GC < 10 kpc and a significant flattening beyond R GC = 10 kpc. In particular, whereas fitting a single linear trend yields an [M/H] gradient of -0.09 ± 0.03 dex kpc -1 - similar to previously measure gradients inside 13 kpc - by independently fitting inside and outside 10 kpc separately we find a significantly steeper gradient near the Sun (7.9 ≤ R GC ≤ 10) than previously found (-0.20 ± 0.08 dex kpc-1) and a nearly flat trend beyond 10 kpc (-0.02 ± 0.09 dex kpc-1).

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