MAGELLAN/M2FS SPECTROSCOPY OF GALAXY CLUSTERS: STELLAR POPULATION MODEL AND APPLICATION TO ABELL 267

Evan Tucker; Matthew G. Walker; Mario Mateo; Edward W. Olszewski; John I. Bailey; Jeffrey D. Crane; Stephen A. Shectman

MAGELLAN/M2FS SPECTROSCOPY OF GALAXY CLUSTERS: STELLAR POPULATION MODEL AND APPLICATION TO ABELL 267

Evan Tucker, Matthew G. Walker, Mario Mateo, Edward W. Olszewski, John I. Bailey, Jeffrey D. Crane, Stephen A. Shectman

Astronomy

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

Abstract

We report the results of a pilot program to use the Magellan/M2FS spectrograph to survey the galactic populations and internal kinematics of galaxy clusters. For this initial study, we present spectroscopic measurements for 223 quiescent galaxies observed along the line of sight to the galaxy cluster Abell 267 (z ∼ 0.23). We develop a Bayesian method for modeling the integrated light from each galaxy as a simple stellar population, with free parameters that specify redshift (v_los/c) and characteristic age, metallicity ([Fe/H]), alpha-abundance ([α/Fe]), and internal velocity dispersion (σ_int) for individual galaxies. Parameter estimates derived from our 1.5-hour observation of A267 have median random errors of σ_v_los = 20 km s⁻¹, σ_Age = 1.2 Gyr, σ_[Fe/H_] = 0.11 dex, σ_[α/Fe_] = 0.07 dex, and σ_σ_int = 20 km s⁻¹. In a companion paper, we use these results to model the structure and internal kinematics of A267.

Original language	English (US)
Journal	Unknown Journal
State	Published - Jul 31 2017

Keywords

Galaxies: clusters: individual(Abell 267)
Galaxies: general
Techniques: imaging spectroscopy

ASJC Scopus subject areas

General

Fingerprint Dive into the research topics of 'MAGELLAN/M2FS SPECTROSCOPY OF GALAXY CLUSTERS: STELLAR POPULATION MODEL AND APPLICATION TO ABELL 267'. Together they form a unique fingerprint.

Cite this

@article{8ffcac1d0faf457882c36c6ebbb342a2,

title = "MAGELLAN/M2FS SPECTROSCOPY OF GALAXY CLUSTERS: STELLAR POPULATION MODEL AND APPLICATION TO ABELL 267",

abstract = "We report the results of a pilot program to use the Magellan/M2FS spectrograph to survey the galactic populations and internal kinematics of galaxy clusters. For this initial study, we present spectroscopic measurements for 223 quiescent galaxies observed along the line of sight to the galaxy cluster Abell 267 (z ∼ 0.23). We develop a Bayesian method for modeling the integrated light from each galaxy as a simple stellar population, with free parameters that specify redshift (vlos/c) and characteristic age, metallicity ([Fe/H]), alpha-abundance ([α/Fe]), and internal velocity dispersion (σint) for individual galaxies. Parameter estimates derived from our 1.5-hour observation of A267 have median random errors of σvlos = 20 km s−1, σAge = 1.2 Gyr, σ[Fe/H] = 0.11 dex, σ[α/Fe] = 0.07 dex, and σσint = 20 km s−1. In a companion paper, we use these results to model the structure and internal kinematics of A267.",

keywords = "Galaxies: clusters: individual(Abell 267), Galaxies: general, Techniques: imaging spectroscopy",

author = "Evan Tucker and Walker, {Matthew G.} and Mario Mateo and Olszewski, {Edward W.} and Bailey, {John I.} and Crane, {Jeffrey D.} and Shectman, {Stephen A.}",

year = "2017",

month = jul,

day = "31",

language = "English (US)",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

}

TY - JOUR

T1 - MAGELLAN/M2FS SPECTROSCOPY OF GALAXY CLUSTERS

T2 - STELLAR POPULATION MODEL AND APPLICATION TO ABELL 267

AU - Tucker, Evan

AU - Walker, Matthew G.

AU - Mateo, Mario

AU - Olszewski, Edward W.

AU - Bailey, John I.

AU - Crane, Jeffrey D.

AU - Shectman, Stephen A.

PY - 2017/7/31

Y1 - 2017/7/31

N2 - We report the results of a pilot program to use the Magellan/M2FS spectrograph to survey the galactic populations and internal kinematics of galaxy clusters. For this initial study, we present spectroscopic measurements for 223 quiescent galaxies observed along the line of sight to the galaxy cluster Abell 267 (z ∼ 0.23). We develop a Bayesian method for modeling the integrated light from each galaxy as a simple stellar population, with free parameters that specify redshift (vlos/c) and characteristic age, metallicity ([Fe/H]), alpha-abundance ([α/Fe]), and internal velocity dispersion (σint) for individual galaxies. Parameter estimates derived from our 1.5-hour observation of A267 have median random errors of σvlos = 20 km s−1, σAge = 1.2 Gyr, σ[Fe/H] = 0.11 dex, σ[α/Fe] = 0.07 dex, and σσint = 20 km s−1. In a companion paper, we use these results to model the structure and internal kinematics of A267.

AB - We report the results of a pilot program to use the Magellan/M2FS spectrograph to survey the galactic populations and internal kinematics of galaxy clusters. For this initial study, we present spectroscopic measurements for 223 quiescent galaxies observed along the line of sight to the galaxy cluster Abell 267 (z ∼ 0.23). We develop a Bayesian method for modeling the integrated light from each galaxy as a simple stellar population, with free parameters that specify redshift (vlos/c) and characteristic age, metallicity ([Fe/H]), alpha-abundance ([α/Fe]), and internal velocity dispersion (σint) for individual galaxies. Parameter estimates derived from our 1.5-hour observation of A267 have median random errors of σvlos = 20 km s−1, σAge = 1.2 Gyr, σ[Fe/H] = 0.11 dex, σ[α/Fe] = 0.07 dex, and σσint = 20 km s−1. In a companion paper, we use these results to model the structure and internal kinematics of A267.

KW - Galaxies: clusters: individual(Abell 267)

KW - Galaxies: general

KW - Techniques: imaging spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85094428275&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85094428275&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85094428275

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

ER -