AustralieFrV1, Main, Exploration, bibRecord, 006367

On the absence of molecular absorption in high‐redshift millimetre‐band searches

Identifieur interne : 006367 ( Main/Exploration ); précédent : 006366; suivant : 006368

On the absence of molecular absorption in high‐redshift millimetre‐band searches

Auteurs : S. J. Curran [Australie] ; M. T. Whiting [Australie] ; F. Combes [France] ; N. Kuno [Japon] ; P. Francis [Australie] ; N. Nakai [Japon] ; J. K. Webb [Australie] ; M. T. Murphy [Australie] ; T. Wiklind [États-Unis, Suède, Chili]

Source :

Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2011-09-21.

RBID : ISTEX:A3D52BC9EF5CA2EECD7DD37AE97844B7A92AED55

Descripteurs français

Pascal (Inist)
- Abondance, Absorption moléculaire, Continuum, Cosmologie, Couleur, Déplacement vers le rouge, Excitation, Galaxies actives, Luminosité, Quasar, Radiogalaxies, Radiosource cosmique, Raie absorption, Température zéro K, Transition rotationnelle.
Wicri :
- topic : Cosmologie.

English descriptors

KwdEn :
- Absorber, Absorption line, Abundance, Active galaxies, Carilli, Color, Colour, Colour depth, Column densities, Column density, Column density limits, Combes, Continuum, Cosmic radio sources, Cosmology, Curran, Curran whiting, Decimetre, Drinkwater, Emission redshift, Excitation, Excitation temperature, Excitation temperatures, Fwhm, Galaxy, Host galaxy, Iram, Luminosity, Millimetre, Millimetre absorbers, Millimetre absorption, Mnras, Molecular absorption, Molecular fractions, Monthly notices, Optical depth, Previous surveys, Prochaska, Quasar, Quasars, Radio galaxies, Red shift, Reddening, Redshift, Rotational transition, Spectral scans, Temperature zero K, Total column density, Ultraviolet luminosities, Webb, Whiting, Wiklind, Wiklind combes.
Teeft :
- Absorber, Carilli, Colour, Colour depth, Column densities, Column density, Column density limits, Combes, Curran, Curran whiting, Decimetre, Drinkwater, Emission redshift, Excitation, Excitation temperature, Excitation temperatures, Fwhm, Galaxy, Host galaxy, Iram, Luminosity, Millimetre, Millimetre absorbers, Millimetre absorption, Mnras, Molecular absorption, Molecular fractions, Monthly notices, Optical depth, Previous surveys, Prochaska, Quasar, Reddening, Redshift, Spectral scans, Total column density, Ultraviolet luminosities, Webb, Whiting, Wiklind, Wiklind combes.

Abstract

We have undertaken a search for millimetre‐waveband absorption (through the CO and HCO+ rotational transitions) in the host galaxies of reddened radio sources (z= 0.405–1.802). Despite the colour selection (optical–near‐infrared colours of V−K≳ 5 in all but one source), no absorption was found in any of the eight quasars for which the background continuum flux was detected. On the basis of the previous (mostly intervening) H2 and OH detections, the limits reached here and in some previous surveys should be deep enough to detect molecular absorption according to their V−K colours. However, our survey makes the assumption that the reddening is associated with dust close to the emission redshift of the quasar and that the narrow millimetre component of this emission is intercepted by the compact molecular cores. By using the known millimetre absorbers to define the colour depth and comparing this with the ultraviolet luminosities of the sources, we find that, even if these assumptions are valid, only 12 of the 40 objects (mainly from this work) are potentially detectable. This is assuming an excitation temperature of Tx= 10 K at z= 0, with the number decreasing with increasing temperatures (to zero detectable at Tx≳ 100 K).

Url:

https://api.istex.fr/document/A3D52BC9EF5CA2EECD7DD37AE97844B7A92AED55/fulltext/pdf

DOI: 10.1111/j.1365-2966.2011.19193.x

Affiliations:

Australie, Chili, France, Japon, Suède, États-Unis
Maryland, Île-de-France
Paris

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Absorber</term>
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<term>Active galaxies</term>
<term>Carilli</term>
<term>Color</term>
<term>Colour</term>
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<term>Drinkwater</term>
<term>Emission redshift</term>
<term>Excitation</term>
<term>Excitation temperature</term>
<term>Excitation temperatures</term>
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<term>Galaxy</term>
<term>Host galaxy</term>
<term>Iram</term>
<term>Luminosity</term>
<term>Millimetre</term>
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<term>Millimetre absorption</term>
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<term>Previous surveys</term>
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<term>Quasar</term>
<term>Quasars</term>
<term>Radio galaxies</term>
<term>Red shift</term>
<term>Reddening</term>
<term>Redshift</term>
<term>Rotational transition</term>
<term>Spectral scans</term>
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<front><div type="abstract" xml:lang="en">We have undertaken a search for millimetre‐waveband absorption (through the CO and HCO+ rotational transitions) in the host galaxies of reddened radio sources (z= 0.405–1.802). Despite the colour selection (optical–near‐infrared colours of V−K≳ 5 in all but one source), no absorption was found in any of the eight quasars for which the background continuum flux was detected. On the basis of the previous (mostly intervening) H2 and OH detections, the limits reached here and in some previous surveys should be deep enough to detect molecular absorption according to their V−K colours. However, our survey makes the assumption that the reddening is associated with dust close to the emission redshift of the quasar and that the narrow millimetre component of this emission is intercepted by the compact molecular cores. By using the known millimetre absorbers to define the colour depth and comparing this with the ultraviolet luminosities of the sources, we find that, even if these assumptions are valid, only 12 of the 40 objects (mainly from this work) are potentially detectable. This is assuming an excitation temperature of Tx= 10 K at z= 0, with the number decreasing with increasing temperatures (to zero detectable at Tx≳ 100 K).</div>
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Serveur d'exploration sur les relations entre la France et l'Australie

On the absence of molecular absorption in high‐redshift millimetre‐band searches

On the absence of molecular absorption in high‐redshift millimetre‐band searches

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

	Serveur d'exploration sur les relations entre la France et l'Australie
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