The first 8-13 μm spectra of globular cluster red giants: Circumstellar silicate dust grains in 47 Tucanae (NGC 104)

J. Th Van Loon; I. McDonald; J. M. Oliveira; A. Evans; M. L. Boyer; Robert D Gehrz; E. Polomski; Chick E Woodward

doi:10.1051/0004-6361:20054702

The first 8-13 μm spectra of globular cluster red giants: Circumstellar silicate dust grains in 47 Tucanae (NGC 104)

J. Th Van Loon, I. McDonald, J. M. Oliveira, A. Evans, M. L. Boyer, Robert D Gehrz, E. Polomski, Chick E Woodward

Physics and Astronomy (Twin Cities)

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

34 Scopus citations

Abstract

We present 8-13 μm spectra of eight red giants in the globular cluster 47 Tucanae (NGC 104), obtained at the European Southern Observatory 3.6 m telescope. These are the first mid-infrared spectra of metal-poor, low-mass stars. The spectrum of at least one of these, namely the extremely red, large-amplitude variable VI, shows direct evidence of circumstellar grains made of amorphous silicate.

Original language	English (US)
Pages (from-to)	339-343
Number of pages	5
Journal	Astronomy and Astrophysics
Volume	450
Issue number	1
DOIs	https://doi.org/10.1051/0004-6361:20054702
State	Published - Apr 2006

Keywords

Circumstellar matter
Globular clusters: individual: 47 Tucanae (NGC 104)
Infrared: stars
Stars: AGB and post-AGB
Stars: evolution
Stars: mass-loss

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10.1051/0004-6361:20054702

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title = "The first 8-13 μm spectra of globular cluster red giants: Circumstellar silicate dust grains in 47 Tucanae (NGC 104)",

abstract = "We present 8-13 μm spectra of eight red giants in the globular cluster 47 Tucanae (NGC 104), obtained at the European Southern Observatory 3.6 m telescope. These are the first mid-infrared spectra of metal-poor, low-mass stars. The spectrum of at least one of these, namely the extremely red, large-amplitude variable VI, shows direct evidence of circumstellar grains made of amorphous silicate.",

keywords = "Circumstellar matter, Globular clusters: individual: 47 Tucanae (NGC 104), Infrared: stars, Stars: AGB and post-AGB, Stars: evolution, Stars: mass-loss",

author = "{Van Loon}, {J. Th} and I. McDonald and Oliveira, {J. M.} and A. Evans and Boyer, {M. L.} and Gehrz, {Robert D} and E. Polomski and Woodward, {Chick E}",

year = "2006",

month = apr,

doi = "10.1051/0004-6361:20054702",

language = "English (US)",

volume = "450",

pages = "339--343",

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TY - JOUR

T1 - The first 8-13 μm spectra of globular cluster red giants

T2 - Circumstellar silicate dust grains in 47 Tucanae (NGC 104)

AU - Van Loon, J. Th

AU - McDonald, I.

AU - Oliveira, J. M.

AU - Evans, A.

AU - Boyer, M. L.

AU - Gehrz, Robert D

AU - Polomski, E.

AU - Woodward, Chick E

PY - 2006/4

Y1 - 2006/4

N2 - We present 8-13 μm spectra of eight red giants in the globular cluster 47 Tucanae (NGC 104), obtained at the European Southern Observatory 3.6 m telescope. These are the first mid-infrared spectra of metal-poor, low-mass stars. The spectrum of at least one of these, namely the extremely red, large-amplitude variable VI, shows direct evidence of circumstellar grains made of amorphous silicate.

AB - We present 8-13 μm spectra of eight red giants in the globular cluster 47 Tucanae (NGC 104), obtained at the European Southern Observatory 3.6 m telescope. These are the first mid-infrared spectra of metal-poor, low-mass stars. The spectrum of at least one of these, namely the extremely red, large-amplitude variable VI, shows direct evidence of circumstellar grains made of amorphous silicate.

KW - Circumstellar matter

KW - Globular clusters: individual: 47 Tucanae (NGC 104)

KW - Infrared: stars

KW - Stars: AGB and post-AGB

KW - Stars: evolution

KW - Stars: mass-loss

UR - http://www.scopus.com/inward/record.url?scp=33645803404&partnerID=8YFLogxK

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U2 - 10.1051/0004-6361:20054702

DO - 10.1051/0004-6361:20054702

M3 - Article

AN - SCOPUS:33645803404

SN - 0004-6361

VL - 450

SP - 339

EP - 343

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 1

ER -

The first 8-13 μm spectra of globular cluster red giants: Circumstellar silicate dust grains in 47 Tucanae (NGC 104)

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Keywords

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