The Far-infrared Emission of the First Massive Galaxies

Massive Population II galaxies undergoing the first phase of vigorous star formation after the initial Population III stage should have high energy densities and silicate-rich interstellar dust. We have modeled the resulting far-infrared spectral energy distributions (SEDs), demonstrating that they...

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Detalles Bibliográficos
Publicado: 2018
Materias:
galaxies: abundances
galaxies: evolution
galaxies: high-redshift
infrared: galaxies
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v869_n1_p_DeRossi
http://hdl.handle.net/20.500.12110/paper_0004637X_v869_n1_p_DeRossi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0004637X_v869_n1_p_DeRossi
record_format dspace
spelling paper:paper_0004637X_v869_n1_p_DeRossi2023-06-08T14:29:22Z The Far-infrared Emission of the First Massive Galaxies galaxies: abundances galaxies: evolution galaxies: high-redshift infrared: galaxies Massive Population II galaxies undergoing the first phase of vigorous star formation after the initial Population III stage should have high energy densities and silicate-rich interstellar dust. We have modeled the resulting far-infrared spectral energy distributions (SEDs), demonstrating that they are shifted substantially to bluer ("warmer") wavelengths relative to the best fitting ones at z ≈ 3, and with strong outputs in the 10-40 μm range. When combined with a low level of emission by carbon dust, their SEDs match that of Haro 11, a local moderately low-metallicity galaxy undergoing a very young and vigorous starburst that is likely to approximate the relevant conditions in young Population II galaxies. We expect to see similar SEDs at high redshifts (z 5) given the youth of galaxies at this epoch. In fact, we find a progression with redshift in observed galaxy SEDs, from those resembling local ones at 2 ≲ z < 4 to a closer resemblance with Haro 11 at 5 ≲ z < 7. In addition to the insight on conditions in high-redshift galaxies, this result implies that estimates of the total infrared luminosities at z ∼ 6 based on measurements near λ ∼ 1 mm can vary by factors of 2-4, depending on the SED template used. Currently popular modified blackbodies or local templates can result in significant underestimates compared with the preferred template based on the SED of Haro 11. © 2018. The American Astronomical Society. All rights reserved. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v869_n1_p_DeRossi http://hdl.handle.net/20.500.12110/paper_0004637X_v869_n1_p_DeRossi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic galaxies: abundances
galaxies: evolution
galaxies: high-redshift
infrared: galaxies
spellingShingle galaxies: abundances
galaxies: evolution
galaxies: high-redshift
infrared: galaxies
The Far-infrared Emission of the First Massive Galaxies
topic_facet galaxies: abundances
galaxies: evolution
galaxies: high-redshift
infrared: galaxies
description Massive Population II galaxies undergoing the first phase of vigorous star formation after the initial Population III stage should have high energy densities and silicate-rich interstellar dust. We have modeled the resulting far-infrared spectral energy distributions (SEDs), demonstrating that they are shifted substantially to bluer ("warmer") wavelengths relative to the best fitting ones at z ≈ 3, and with strong outputs in the 10-40 μm range. When combined with a low level of emission by carbon dust, their SEDs match that of Haro 11, a local moderately low-metallicity galaxy undergoing a very young and vigorous starburst that is likely to approximate the relevant conditions in young Population II galaxies. We expect to see similar SEDs at high redshifts (z 5) given the youth of galaxies at this epoch. In fact, we find a progression with redshift in observed galaxy SEDs, from those resembling local ones at 2 ≲ z < 4 to a closer resemblance with Haro 11 at 5 ≲ z < 7. In addition to the insight on conditions in high-redshift galaxies, this result implies that estimates of the total infrared luminosities at z ∼ 6 based on measurements near λ ∼ 1 mm can vary by factors of 2-4, depending on the SED template used. Currently popular modified blackbodies or local templates can result in significant underestimates compared with the preferred template based on the SED of Haro 11. © 2018. The American Astronomical Society. All rights reserved.
title The Far-infrared Emission of the First Massive Galaxies
title_short The Far-infrared Emission of the First Massive Galaxies
title_full The Far-infrared Emission of the First Massive Galaxies
title_fullStr The Far-infrared Emission of the First Massive Galaxies
title_full_unstemmed The Far-infrared Emission of the First Massive Galaxies
title_sort far-infrared emission of the first massive galaxies
publishDate 2018
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v869_n1_p_DeRossi
http://hdl.handle.net/20.500.12110/paper_0004637X_v869_n1_p_DeRossi
_version_ 1768545398927917056

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