Infrared emission from the nearby cool core cluster abell 2597

Megan Donahue; Andrés Jordán; Stefi A. Baum; Patrick Côté; Laura Ferrarese; Paul Goudfrooij; Duccio Macchetto; Sangeeta Malhotra; Christopher P. O'Dea; James E. Pringle; James E. Rhoads; William B. Sparks; G. Mark Voit

doi:10.1086/522575

Infrared emission from the nearby cool core cluster abell 2597

Megan Donahue, Andrés Jordán, Stefi A. Baum, Patrick Côté, Laura Ferrarese, Paul Goudfrooij, Duccio Macchetto, Sangeeta Malhotra, Christopher P. O'Dea, James E. Pringle, James E. Rhoads, William B. Sparks, G. Mark Voit

Earth and Space Exploration, School of (SESE)

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

16 Scopus citations

Abstract

We observed the brightest central galaxy (BCG) in the nearby (z = 0.0821) cool core galaxy cluster Abell 2597 with the IRAC and MIPS instruments on board the Spitzer Space Telescope. The BCG was clearly detected in all Spitzer bandpasses, including the 70 and 160 μm wave bands. We report aperture photometry of the BCG. The spectral energy distribution exhibits a clear excess in the far-IR over a Rayleigh-Jeans stellar tail, indicating a star formation rate of ∼4-5 M_⊙ yr^_1, consistent with the estimates from the UV and its Hα luminosity. This large far-IR luminosity is consistent with that of a starburst or a luminous infrared galaxy, but together with a very massive and old population of stars that dominate the energy output of the galaxy. If the dust is at one temperature, the ratio of 70 to 160 μm fluxes indicates that the dust emitting mid-IR in this source is somewhat hotter than the dust emitting mid-IR in two BCGs at higher redshift (z ∼ 0.2-0.3) and higher far-IR luminosities observed earlier by Spitzer in clusters Abell 1835 and Zwickv3146.

Original language	English (US)
Pages (from-to)	231-236
Number of pages	6
Journal	Astrophysical Journal
Volume	670
Issue number	1
DOIs	https://doi.org/10.1086/522575
State	Published - Nov 20 2007

Keywords

Cooling flows
Galaxies: clusters: general
Galaxies: clusters: individual (Abell 2597)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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title = "Infrared emission from the nearby cool core cluster abell 2597",

abstract = "We observed the brightest central galaxy (BCG) in the nearby (z = 0.0821) cool core galaxy cluster Abell 2597 with the IRAC and MIPS instruments on board the Spitzer Space Telescope. The BCG was clearly detected in all Spitzer bandpasses, including the 70 and 160 μm wave bands. We report aperture photometry of the BCG. The spectral energy distribution exhibits a clear excess in the far-IR over a Rayleigh-Jeans stellar tail, indicating a star formation rate of ∼4-5 M⊙ yr_1, consistent with the estimates from the UV and its Hα luminosity. This large far-IR luminosity is consistent with that of a starburst or a luminous infrared galaxy, but together with a very massive and old population of stars that dominate the energy output of the galaxy. If the dust is at one temperature, the ratio of 70 to 160 μm fluxes indicates that the dust emitting mid-IR in this source is somewhat hotter than the dust emitting mid-IR in two BCGs at higher redshift (z ∼ 0.2-0.3) and higher far-IR luminosities observed earlier by Spitzer in clusters Abell 1835 and Zwickv3146.",

keywords = "Cooling flows, Galaxies: clusters: general, Galaxies: clusters: individual (Abell 2597)",

author = "Megan Donahue and Andr{\'e}s Jord{\'a}n and Baum, {Stefi A.} and Patrick C{\^o}t{\'e} and Laura Ferrarese and Paul Goudfrooij and Duccio Macchetto and Sangeeta Malhotra and O'Dea, {Christopher P.} and Pringle, {James E.} and Rhoads, {James E.} and Sparks, {William B.} and Voit, {G. Mark}",

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T1 - Infrared emission from the nearby cool core cluster abell 2597

AU - Donahue, Megan

AU - Jordán, Andrés

AU - Baum, Stefi A.

AU - Côté, Patrick

AU - Ferrarese, Laura

AU - Goudfrooij, Paul

AU - Macchetto, Duccio

AU - Malhotra, Sangeeta

AU - O'Dea, Christopher P.

AU - Pringle, James E.

AU - Rhoads, James E.

AU - Sparks, William B.

AU - Voit, G. Mark

PY - 2007/11/20

Y1 - 2007/11/20

N2 - We observed the brightest central galaxy (BCG) in the nearby (z = 0.0821) cool core galaxy cluster Abell 2597 with the IRAC and MIPS instruments on board the Spitzer Space Telescope. The BCG was clearly detected in all Spitzer bandpasses, including the 70 and 160 μm wave bands. We report aperture photometry of the BCG. The spectral energy distribution exhibits a clear excess in the far-IR over a Rayleigh-Jeans stellar tail, indicating a star formation rate of ∼4-5 M⊙ yr_1, consistent with the estimates from the UV and its Hα luminosity. This large far-IR luminosity is consistent with that of a starburst or a luminous infrared galaxy, but together with a very massive and old population of stars that dominate the energy output of the galaxy. If the dust is at one temperature, the ratio of 70 to 160 μm fluxes indicates that the dust emitting mid-IR in this source is somewhat hotter than the dust emitting mid-IR in two BCGs at higher redshift (z ∼ 0.2-0.3) and higher far-IR luminosities observed earlier by Spitzer in clusters Abell 1835 and Zwickv3146.

AB - We observed the brightest central galaxy (BCG) in the nearby (z = 0.0821) cool core galaxy cluster Abell 2597 with the IRAC and MIPS instruments on board the Spitzer Space Telescope. The BCG was clearly detected in all Spitzer bandpasses, including the 70 and 160 μm wave bands. We report aperture photometry of the BCG. The spectral energy distribution exhibits a clear excess in the far-IR over a Rayleigh-Jeans stellar tail, indicating a star formation rate of ∼4-5 M⊙ yr_1, consistent with the estimates from the UV and its Hα luminosity. This large far-IR luminosity is consistent with that of a starburst or a luminous infrared galaxy, but together with a very massive and old population of stars that dominate the energy output of the galaxy. If the dust is at one temperature, the ratio of 70 to 160 μm fluxes indicates that the dust emitting mid-IR in this source is somewhat hotter than the dust emitting mid-IR in two BCGs at higher redshift (z ∼ 0.2-0.3) and higher far-IR luminosities observed earlier by Spitzer in clusters Abell 1835 and Zwickv3146.

KW - Cooling flows

KW - Galaxies: clusters: general

KW - Galaxies: clusters: individual (Abell 2597)

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Infrared emission from the nearby cool core cluster abell 2597

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Keywords

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