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AN AROMATIC INVENTORY OF THE LOCAL VOLUME
Indexado
WoS WOS:000277216100043
Scopus SCOPUS_ID:77951850320
DOI 10.1088/0004-637X/715/1/506
Año 2010
Tipo artículo de investigación

Citas Totales

Autores Afiliación Chile

Instituciones Chile

% Participación
Internacional

Autores
Afiliación Extranjera

Instituciones
Extranjeras


Abstract



Using infrared photometry from the Spitzer Space Telescope, we perform the first inventory of aromatic feature emission (also commonly referred to as polycyclic aromatic hydrocarbon emission) for a statistically complete sample of star-forming galaxies in the local volume. The photometric methodology involved is calibrated and demonstrated to recover the aromatic fraction of the Infrared Array Camera 8 mu m flux with a standard deviation of 6% for a training set of 40 SINGS galaxies (ranging from stellar to dust dominated) with both suitable mid-infrared Spitzer Infrared Spectrograph spectra and equivalent photometry. A potential factor of 2 improvement could be realized with suitable 5.5 mu m and 10 mu m photometry, such as what may be provided in the future by the James Webb Space Telescope. The resulting technique is then applied to mid-infrared photometry for the 258 galaxies from the Local Volume Legacy (LVL) survey, a large sample dominated in number by low-luminosity dwarf galaxies for which obtaining comparable mid-infrared spectroscopy is not feasible. We find the total LVL luminosity due to five strong aromatic features in the 8 mu m complex to be 2.47 x 10(10) L(circle dot) with a mean volume density of 8.8 x 10(6) L(circle dot) Mpc(-3). Twenty-four of the LVL galaxies, corresponding to a luminosity cut at M(B) = -18.22, account for 90% of the aromatic luminosity. Using oxygen abundances compiled from the literature for 129 of the 258 LVL galaxies, we find a correlation between metallicity and the aromatic-to-total infrared emission ratio but not the aromatic-to-total 8 mu m dust emission ratio. A possible explanation is that metallicity plays a role in the abundance of aromatic molecules relative to the total dust content, but other factors, such as star formation and/or the local radiation field, affect the excitation of those molecules.

Revista



Revista ISSN
Astrophysical Journal 0004-637X

Métricas Externas



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Disciplinas de Investigación



WOS
Astronomy & Astrophysics
Scopus
Sin Disciplinas
SciELO
Sin Disciplinas

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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional



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Autores - Afiliación



Ord. Autor Género Institución - País
1 Marble, A. R. - UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos
2 Engelbracht, Charles Hombre UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos
3 van Zee, L. Mujer Indiana Univ - Estados Unidos
Indiana University Bloomington - Estados Unidos
4 Dale, Daniel A. Hombre UNIV WYOMING - Estados Unidos
University of Wyoming - Estados Unidos
5 Smith, J. T. Hombre Univ Toledo - Estados Unidos
The University of Toledo - Estados Unidos
6 Gordon, K. Hombre Space Telescope Sci Inst - Estados Unidos
STScI - Estados Unidos
Space Telescope Science Institute - Estados Unidos
7 Wu, Y. - CALTECH - Estados Unidos
California Institute of Technology - Estados Unidos
8 Lee, J. C. Mujer Observatorio Las Campanas - Estados Unidos
Carnegie Observ - Estados Unidos
Carnegie Observatories - Estados Unidos
9 Kennicutt, R. C. Hombre UNIV CAMBRIDGE - Reino Unido
Institute of Astronomy - Reino Unido
10 Skillman, Evan D. Hombre Univ Minnesota - Estados Unidos
University of Minnesota - Estados Unidos
University of Minnesota Twin Cities - Estados Unidos
11 Johnson, L. Clifton - UNIV WASHINGTON - Estados Unidos
University of Washington, Seattle - Estados Unidos
University of Washington - Estados Unidos
12 Block, M. - UNIV ARIZONA - Estados Unidos
The University of Arizona - Estados Unidos
13 Calzetti, Daniela Mujer Univ Massachusetts - Estados Unidos
University of Massachusetts Amherst - Estados Unidos
14 Cohen, S. A. - UNIV WYOMING - Estados Unidos
University of Wyoming - Estados Unidos
15 Lee, H. - Observatorio Gemini - Chile
Gemini ObservatorySouthern Operations Center - Chile
16 Schuster, M. D. - UNIV WYOMING - Estados Unidos
University of Wyoming - Estados Unidos

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Origen de Citas Identificadas



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Citas identificadas: Las citas provienen de documentos incluidos en la base de datos de DATACIENCIA

Citas Identificadas: 2.6 %
Citas No-identificadas: 97.4 %

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Citas identificadas: Las citas provienen de documentos incluidos en la base de datos de DATACIENCIA

Citas Identificadas: 2.6 %
Citas No-identificadas: 97.4 %

Financiamiento



Fuente
National Science Foundation
National Aeronautics and Space Administration (NASA)
Science and Technology Facilities Council

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Agradecimientos



Agradecimiento
This work is part of the Spitzer Space Telescope Legacy Science Program and was supported by National Aeronautics and Space Administration (NASA) through contract 1336000 issued by the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech) under NASA contract 1407. Additionally, this publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center (IPAC) at Caltech, funded by NASA and the National Science Foundation. This research has made use of the NASA/IPAC Extragalactic Database, which is operated by JPL/Caltech, under contract with NASA. Finally, we thank the referee for helpful comments and suggestions that resulted in an improved paper.

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