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

Identifieur interne : 004593 ( PascalFrancis/Curation ); précédent : 004592; suivant : 004594

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 :

RBID : Pascal:11-0409599

Descripteurs français

English descriptors

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).
pA  
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A03   1    @0 Mon. Not. R. Astron. Soc.
A05       @2 416
A06       @2 3
A08 01  1  ENG  @1 On the absence of molecular absorption in high-redshift millimetre-band searches
A11 01  1    @1 CURRAN (S. J.)
A11 02  1    @1 WHITING (M. T.)
A11 03  1    @1 COMBES (F.)
A11 04  1    @1 KUNO (N.)
A11 05  1    @1 FRANCIS (P.)
A11 06  1    @1 NAKAI (N.)
A11 07  1    @1 WEBB (J. K.)
A11 08  1    @1 MURPHY (M. T.)
A11 09  1    @1 WIKLIND (T.)
A14 01      @1 School of Physics, University of New South Wales @2 Sydney, NSW 2052 @3 AUS @Z 1 aut. @Z 2 aut. @Z 7 aut. @Z 8 aut.
A14 02      @1 CSIRO Australia Telescope National Facility, PO Box 76 @2 Epping, NSW 1710 @3 AUS @Z 2 aut.
A14 03      @1 LERMA, Observatoire de Paris, 77 Avenue Denfert-Rocherecau @2 75014 Paris @3 FRA @Z 3 aut.
A14 04      @1 Nobeyama Radio Observatory @2 Nagano 384-1305 @3 JPN @Z 4 aut.
A14 05      @1 Australian National University @2 Canberra @3 AUS @Z 5 aut.
A14 06      @1 Institute of Physics, University of Tsukuba, Ten-noudai @2 Tsukuba, Ibaraki 305-8571 @3 JPN @Z 6 aut.
A14 07      @1 Centre for Astrophysics and Supercornputing, Swinburne University of Technology, PO Box 218 @2 Hawthorn, VIC 3122 @3 AUS @Z 8 aut.
A14 08      @1 Space Telescope Science Institute @2 Baltimore, MD 21218 @3 USA @Z 9 aut.
A14 09      @1 Onsala Space Observatory @2 439 92 Onsala @3 SWE @Z 9 aut.
A14 10      @1 Joint ALMA Observatory @2 Santiago @3 CHL @Z 9 aut.
A20       @1 2143-2153
A21       @1 2011
A23 01      @0 ENG
A43 01      @1 INIST @2 2067 @5 354000509103310400
A44       @0 0000 @1 © 2011 INIST-CNRS. All rights reserved.
A45       @0 3/4 p.
A47 01  1    @0 11-0409599
A60       @1 P
A61       @0 A
A64 01  1    @0 Monthly Notices of the Royal Astronomical Society
A66 01      @0 USA
C01 01    ENG  @0 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).
C02 01  3    @0 001E03
C03 01  X  FRE  @0 Absorption moléculaire @5 26
C03 01  X  ENG  @0 Molecular absorption @5 26
C03 01  X  SPA  @0 Absorción molecular @5 26
C03 02  3  FRE  @0 Déplacement vers le rouge @5 27
C03 02  3  ENG  @0 Red shift @5 27
C03 03  X  FRE  @0 Transition rotationnelle @5 28
C03 03  X  ENG  @0 Rotational transition @5 28
C03 03  X  SPA  @0 Transición rotacional @5 28
C03 04  3  FRE  @0 Galaxies actives @5 29
C03 04  3  ENG  @0 Active galaxies @5 29
C03 05  3  FRE  @0 Couleur @5 30
C03 05  3  ENG  @0 Color @5 30
C03 06  3  FRE  @0 Quasar @5 31
C03 06  3  ENG  @0 Quasars @5 31
C03 07  X  FRE  @0 Continuum @5 32
C03 07  X  ENG  @0 Continuum @5 32
C03 07  X  SPA  @0 Continuo @5 32
C03 08  3  FRE  @0 Luminosité @5 33
C03 08  3  ENG  @0 Luminosity @5 33
C03 09  3  FRE  @0 Excitation @5 34
C03 09  3  ENG  @0 Excitation @5 34
C03 10  3  FRE  @0 Température zéro K @5 35
C03 10  3  ENG  @0 Temperature zero K @5 35
C03 11  3  FRE  @0 Abondance @5 36
C03 11  3  ENG  @0 Abundance @5 36
C03 12  X  FRE  @0 Raie absorption @5 37
C03 12  X  ENG  @0 Absorption line @5 37
C03 12  X  SPA  @0 Raya absorción @5 37
C03 13  3  FRE  @0 Cosmologie @5 38
C03 13  3  ENG  @0 Cosmology @5 38
C03 14  3  FRE  @0 Radiogalaxies @5 39
C03 14  3  ENG  @0 Radio galaxies @5 39
C03 15  3  FRE  @0 Radiosource cosmique @5 40
C03 15  3  ENG  @0 Cosmic radio sources @5 40
N21       @1 283
N44 01      @1 OTO
N82       @1 OTO

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Pascal:11-0409599

Le document en format XML

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<term>Absorption line</term>
<term>Abundance</term>
<term>Active galaxies</term>
<term>Color</term>
<term>Continuum</term>
<term>Cosmic radio sources</term>
<term>Cosmology</term>
<term>Excitation</term>
<term>Luminosity</term>
<term>Molecular absorption</term>
<term>Quasars</term>
<term>Radio galaxies</term>
<term>Red shift</term>
<term>Rotational transition</term>
<term>Temperature zero K</term>
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<term>Absorption moléculaire</term>
<term>Déplacement vers le rouge</term>
<term>Transition rotationnelle</term>
<term>Galaxies actives</term>
<term>Couleur</term>
<term>Quasar</term>
<term>Continuum</term>
<term>Luminosité</term>
<term>Excitation</term>
<term>Température zéro K</term>
<term>Abondance</term>
<term>Raie absorption</term>
<term>Cosmologie</term>
<term>Radiogalaxies</term>
<term>Radiosource cosmique</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
<sup>+</sup>
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) H
<sub>2</sub>
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 T
<sub>x</sub>
= 10 K at z = 0, with the number decreasing with increasing temperatures (to zero detectable at T
<sub>x</sub>
? 100 K).</div>
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<s2>3</s2>
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<fA08 i1="01" i2="1" l="ENG">
<s1>On the absence of molecular absorption in high-redshift millimetre-band searches</s1>
</fA08>
<fA11 i1="01" i2="1">
<s1>CURRAN (S. J.)</s1>
</fA11>
<fA11 i1="02" i2="1">
<s1>WHITING (M. T.)</s1>
</fA11>
<fA11 i1="03" i2="1">
<s1>COMBES (F.)</s1>
</fA11>
<fA11 i1="04" i2="1">
<s1>KUNO (N.)</s1>
</fA11>
<fA11 i1="05" i2="1">
<s1>FRANCIS (P.)</s1>
</fA11>
<fA11 i1="06" i2="1">
<s1>NAKAI (N.)</s1>
</fA11>
<fA11 i1="07" i2="1">
<s1>WEBB (J. K.)</s1>
</fA11>
<fA11 i1="08" i2="1">
<s1>MURPHY (M. T.)</s1>
</fA11>
<fA11 i1="09" i2="1">
<s1>WIKLIND (T.)</s1>
</fA11>
<fA14 i1="01">
<s1>School of Physics, University of New South Wales</s1>
<s2>Sydney, NSW 2052</s2>
<s3>AUS</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>7 aut.</sZ>
<sZ>8 aut.</sZ>
</fA14>
<fA14 i1="02">
<s1>CSIRO Australia Telescope National Facility, PO Box 76</s1>
<s2>Epping, NSW 1710</s2>
<s3>AUS</s3>
<sZ>2 aut.</sZ>
</fA14>
<fA14 i1="03">
<s1>LERMA, Observatoire de Paris, 77 Avenue Denfert-Rocherecau</s1>
<s2>75014 Paris</s2>
<s3>FRA</s3>
<sZ>3 aut.</sZ>
</fA14>
<fA14 i1="04">
<s1>Nobeyama Radio Observatory</s1>
<s2>Nagano 384-1305</s2>
<s3>JPN</s3>
<sZ>4 aut.</sZ>
</fA14>
<fA14 i1="05">
<s1>Australian National University</s1>
<s2>Canberra</s2>
<s3>AUS</s3>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="06">
<s1>Institute of Physics, University of Tsukuba, Ten-noudai</s1>
<s2>Tsukuba, Ibaraki 305-8571</s2>
<s3>JPN</s3>
<sZ>6 aut.</sZ>
</fA14>
<fA14 i1="07">
<s1>Centre for Astrophysics and Supercornputing, Swinburne University of Technology, PO Box 218</s1>
<s2>Hawthorn, VIC 3122</s2>
<s3>AUS</s3>
<sZ>8 aut.</sZ>
</fA14>
<fA14 i1="08">
<s1>Space Telescope Science Institute</s1>
<s2>Baltimore, MD 21218</s2>
<s3>USA</s3>
<sZ>9 aut.</sZ>
</fA14>
<fA14 i1="09">
<s1>Onsala Space Observatory</s1>
<s2>439 92 Onsala</s2>
<s3>SWE</s3>
<sZ>9 aut.</sZ>
</fA14>
<fA14 i1="10">
<s1>Joint ALMA Observatory</s1>
<s2>Santiago</s2>
<s3>CHL</s3>
<sZ>9 aut.</sZ>
</fA14>
<fA20>
<s1>2143-2153</s1>
</fA20>
<fA21>
<s1>2011</s1>
</fA21>
<fA23 i1="01">
<s0>ENG</s0>
</fA23>
<fA43 i1="01">
<s1>INIST</s1>
<s2>2067</s2>
<s5>354000509103310400</s5>
</fA43>
<fA44>
<s0>0000</s0>
<s1>© 2011 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45>
<s0>3/4 p.</s0>
</fA45>
<fA47 i1="01" i2="1">
<s0>11-0409599</s0>
</fA47>
<fA60>
<s1>P</s1>
</fA60>
<fA61>
<s0>A</s0>
</fA61>
<fA64 i1="01" i2="1">
<s0>Monthly Notices of the Royal Astronomical Society</s0>
</fA64>
<fA66 i1="01">
<s0>USA</s0>
</fA66>
<fC01 i1="01" l="ENG">
<s0>We have undertaken a search for millimetre-waveband absorption (through the CO and HCO
<sup>+</sup>
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) H
<sub>2</sub>
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 T
<sub>x</sub>
= 10 K at z = 0, with the number decreasing with increasing temperatures (to zero detectable at T
<sub>x</sub>
? 100 K).</s0>
</fC01>
<fC02 i1="01" i2="3">
<s0>001E03</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE">
<s0>Absorption moléculaire</s0>
<s5>26</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG">
<s0>Molecular absorption</s0>
<s5>26</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA">
<s0>Absorción molecular</s0>
<s5>26</s5>
</fC03>
<fC03 i1="02" i2="3" l="FRE">
<s0>Déplacement vers le rouge</s0>
<s5>27</s5>
</fC03>
<fC03 i1="02" i2="3" l="ENG">
<s0>Red shift</s0>
<s5>27</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE">
<s0>Transition rotationnelle</s0>
<s5>28</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG">
<s0>Rotational transition</s0>
<s5>28</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA">
<s0>Transición rotacional</s0>
<s5>28</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE">
<s0>Galaxies actives</s0>
<s5>29</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG">
<s0>Active galaxies</s0>
<s5>29</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE">
<s0>Couleur</s0>
<s5>30</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG">
<s0>Color</s0>
<s5>30</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE">
<s0>Quasar</s0>
<s5>31</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG">
<s0>Quasars</s0>
<s5>31</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE">
<s0>Continuum</s0>
<s5>32</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG">
<s0>Continuum</s0>
<s5>32</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA">
<s0>Continuo</s0>
<s5>32</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE">
<s0>Luminosité</s0>
<s5>33</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG">
<s0>Luminosity</s0>
<s5>33</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE">
<s0>Excitation</s0>
<s5>34</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG">
<s0>Excitation</s0>
<s5>34</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE">
<s0>Température zéro K</s0>
<s5>35</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG">
<s0>Temperature zero K</s0>
<s5>35</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE">
<s0>Abondance</s0>
<s5>36</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG">
<s0>Abundance</s0>
<s5>36</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE">
<s0>Raie absorption</s0>
<s5>37</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG">
<s0>Absorption line</s0>
<s5>37</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA">
<s0>Raya absorción</s0>
<s5>37</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE">
<s0>Cosmologie</s0>
<s5>38</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG">
<s0>Cosmology</s0>
<s5>38</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE">
<s0>Radiogalaxies</s0>
<s5>39</s5>
</fC03>
<fC03 i1="14" i2="3" l="ENG">
<s0>Radio galaxies</s0>
<s5>39</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE">
<s0>Radiosource cosmique</s0>
<s5>40</s5>
</fC03>
<fC03 i1="15" i2="3" l="ENG">
<s0>Cosmic radio sources</s0>
<s5>40</s5>
</fC03>
<fN21>
<s1>283</s1>
</fN21>
<fN44 i1="01">
<s1>OTO</s1>
</fN44>
<fN82>
<s1>OTO</s1>
</fN82>
</pA>
</standard>
</inist>
</record>

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