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LAMPSS: Discovery of Metal-Poor Stars in the Galactic Halo with the CaHK filter on CFHT MegaCam

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LAMPSS: Discovery of Metal-Poor Stars in the Galactic Halo with the CaHK filter on CFHT MegaCam. / Worrell, Eleanor; Patel, Niam; Wresilo, Karolina; Dicker, Sam; Bray, Olivia; Bagness, Jack; Sobral, David.

In: Notices of Lancaster Astrophysics (NLUAstro), Vol. 1, 07.06.2019, p. 75-90.

Research output: Contribution to Journal/MagazineJournal article

Harvard

Worrell, E, Patel, N, Wresilo, K, Dicker, S, Bray, O, Bagness, J & Sobral, D 2019, 'LAMPSS: Discovery of Metal-Poor Stars in the Galactic Halo with the CaHK filter on CFHT MegaCam', Notices of Lancaster Astrophysics (NLUAstro), vol. 1, pp. 75-90.

APA

Worrell, E., Patel, N., Wresilo, K., Dicker, S., Bray, O., Bagness, J., & Sobral, D. (2019). LAMPSS: Discovery of Metal-Poor Stars in the Galactic Halo with the CaHK filter on CFHT MegaCam. Notices of Lancaster Astrophysics (NLUAstro), 1, 75-90.

Vancouver

Worrell E, Patel N, Wresilo K, Dicker S, Bray O, Bagness J et al. LAMPSS: Discovery of Metal-Poor Stars in the Galactic Halo with the CaHK filter on CFHT MegaCam. Notices of Lancaster Astrophysics (NLUAstro). 2019 Jun 7;1:75-90.

Author

Worrell, Eleanor ; Patel, Niam ; Wresilo, Karolina ; Dicker, Sam ; Bray, Olivia ; Bagness, Jack ; Sobral, David. / LAMPSS: Discovery of Metal-Poor Stars in the Galactic Halo with the CaHK filter on CFHT MegaCam. In: Notices of Lancaster Astrophysics (NLUAstro). 2019 ; Vol. 1. pp. 75-90.

Bibtex

@article{b0d2da3ed888465dab7d3a33513ef92a,
title = "LAMPSS: Discovery of Metal-Poor Stars in the Galactic Halo with the CaHK filter on CFHT MegaCam",
abstract = "We present the Lancaster Astrophysics Metal Poor Star Search (LAMPSS) in the Milky Way halo, conducted using the metallicity-sensitive Ca H & K lines. We use the CaHK filter of the MegaPrime/MegaCam on the Canada-France-Hawaii Telescope (CFHT) to survey an area of 1.010deg2 over the COSMOS field. We combine our new CaHK data with broadband optical and near-infrared photometry of COSMOS to recover stars down to mHK ∼ 26. After removing galaxies, we find 70% completion and 30% contamination for our remaining 1772 stars. By exploring a range of spectral types and metallicities, we derive metallicity-sensitive colour-colour diagrams which we use to isolate different spectral types and metallicities (−5 ≤ [Fe/H ≤ 0). From these, we identify 16 potentially extremely metal-poor stars. One of which, LAMPS 1229, we predict to have [Fe/H] ∼ −5.0 at a distance of (78.21 ± 9.37) kpc. We construct a Metallicity Distribution Function for our sample of metal-poor stars, finding an expected sharp decrease in count as [Fe/H] decreases.",
author = "Eleanor Worrell and Niam Patel and Karolina Wresilo and Sam Dicker and Olivia Bray and Jack Bagness and David Sobral",
note = "Worrell et al. (2019), NLUAstro, 1, 75",
year = "2019",
month = jun,
day = "7",
language = "English",
volume = "1",
pages = "75--90",
journal = "Notices of Lancaster Astrophysics (NLUAstro)",

}

RIS

TY - JOUR

T1 - LAMPSS: Discovery of Metal-Poor Stars in the Galactic Halo with the CaHK filter on CFHT MegaCam

AU - Worrell, Eleanor

AU - Patel, Niam

AU - Wresilo, Karolina

AU - Dicker, Sam

AU - Bray, Olivia

AU - Bagness, Jack

AU - Sobral, David

N1 - Worrell et al. (2019), NLUAstro, 1, 75

PY - 2019/6/7

Y1 - 2019/6/7

N2 - We present the Lancaster Astrophysics Metal Poor Star Search (LAMPSS) in the Milky Way halo, conducted using the metallicity-sensitive Ca H & K lines. We use the CaHK filter of the MegaPrime/MegaCam on the Canada-France-Hawaii Telescope (CFHT) to survey an area of 1.010deg2 over the COSMOS field. We combine our new CaHK data with broadband optical and near-infrared photometry of COSMOS to recover stars down to mHK ∼ 26. After removing galaxies, we find 70% completion and 30% contamination for our remaining 1772 stars. By exploring a range of spectral types and metallicities, we derive metallicity-sensitive colour-colour diagrams which we use to isolate different spectral types and metallicities (−5 ≤ [Fe/H ≤ 0). From these, we identify 16 potentially extremely metal-poor stars. One of which, LAMPS 1229, we predict to have [Fe/H] ∼ −5.0 at a distance of (78.21 ± 9.37) kpc. We construct a Metallicity Distribution Function for our sample of metal-poor stars, finding an expected sharp decrease in count as [Fe/H] decreases.

AB - We present the Lancaster Astrophysics Metal Poor Star Search (LAMPSS) in the Milky Way halo, conducted using the metallicity-sensitive Ca H & K lines. We use the CaHK filter of the MegaPrime/MegaCam on the Canada-France-Hawaii Telescope (CFHT) to survey an area of 1.010deg2 over the COSMOS field. We combine our new CaHK data with broadband optical and near-infrared photometry of COSMOS to recover stars down to mHK ∼ 26. After removing galaxies, we find 70% completion and 30% contamination for our remaining 1772 stars. By exploring a range of spectral types and metallicities, we derive metallicity-sensitive colour-colour diagrams which we use to isolate different spectral types and metallicities (−5 ≤ [Fe/H ≤ 0). From these, we identify 16 potentially extremely metal-poor stars. One of which, LAMPS 1229, we predict to have [Fe/H] ∼ −5.0 at a distance of (78.21 ± 9.37) kpc. We construct a Metallicity Distribution Function for our sample of metal-poor stars, finding an expected sharp decrease in count as [Fe/H] decreases.

M3 - Journal article

VL - 1

SP - 75

EP - 90

JO - Notices of Lancaster Astrophysics (NLUAstro)

JF - Notices of Lancaster Astrophysics (NLUAstro)

ER -