J/MNRAS/435/3376 LFIR and LCO for 247 extragalactic systems (Heywood+, 2013)
Ground-state 12CO emission and a resolved jet at 115GHz (rest frame) in the
radio-loud quasar 3C 318.
Heywood I., Martinez-Sansigre A., Willott C.J., Rawlings S.
<Mon. Not. R. Astron. Soc., 435, 3376-3384 (2013)>
=2013MNRAS.435.3376H 2013MNRAS.435.3376H
ADC_Keywords: Galaxies, radio ; Galaxies, IR ; Carbon monoxide
Keywords: galaxies: evolution - quasars: individual: 3C 318 -
radio lines: galaxies
Abstract:
An analysis of 44GHz Very Large Array observations of the z=1.574
radio-loud quasar 3C 318 has revealed emission from the redshifted
J=1-->0 transition of the CO molecule and spatially resolved the
6.3kpc radio jet associated with the quasar at 115GHz rest frame. The
continuum-subtracted line emitter is spatially offset from the quasar
nucleus by 0.33arcsec (2.82kpc in projection). This spatial offset has
a significance of >8σ and, together with a previously published
-400km/s velocity offset measured in the J=2-->1 CO line relative to
the systemic redshift of the quasar, rules out a circumnuclear
starburst or molecular gas ring and suggests that the quasar host
galaxy is either undergoing a major merger with a gas-rich galaxy or
is otherwise a highly disrupted system. If the merger scenario is
correct, then the event may be in its early stages, acting as the
trigger for both the young radio jets in the quasar and a starburst in
the merging galaxy. The total molecular gas mass in the spatially
offset line emitter as measured from the ground-state CO line
MH2=3.7(±0.4)x1010 (αCO/0.8)M☉. Assuming that the
line emitter can be modelled as a rotating disc, an
inclination-dependent upper limit is derived for its dynamical mass
Mdynsin2(i)<3.2x109M☉, suggesting that for MH2 to remain
less than Mdyn the inclination angle must be i<16°. The
far-infrared and CO luminosities of 246 extragalactic systems are
collated from the literature for comparison. The high molecular gas
content of 3C 318 is consistent with that of the general population of
high-redshift quasars and submillimetre galaxies.
Description:
3C 318 was observed with the VLA in C-configuration in four 5.75h
sessions between 2006 December 22 and 2007 January 11. The array
consisted of 26 antennas, seven of which were fitted with new Expanded
Very Large Array (EVLA) receivers.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 66 247 Collated LFIR and L'CO values for a range of
extragalactic systems
refs.dat 92 31 References
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Name Galaxy name
18- 23 A6 --- Type Morphological type
25- 29 F5.2 [K.km/s/pc2] log(L'CO) Luminosity of CO lines
31- 35 F5.2 [Lsun] log(LFIR) FIR luminosity
37- 40 I4 --- LFIR/L'CO [12/2050] FIR-to-CO luminosity ratio
42- 47 F6.4 --- z [0/6.5] Redshift (1)
49- 54 A6 --- Ref References, in refs.dat file
56- 59 F4.2 --- Jcorr [0.56/1] Transition correction factor (2)
61- 66 F6.2 mag Mag [1/173] Factors applied to correct for
the effects of any gravitational lensing
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Note (1): Note that for the GS2004 entries the redshifts have been calculated
by using the quoted luminosity distances and the cosmological parameters of
Komatsu et al. (2011ApJS..192...18K 2011ApJS..192...18K).
Note (2): J=1-0 transitions are used where available.
If a higher-J transition is used to derived a 1-0 luminosity then the
correction factor is listed here.
If an individual work does not quote a correction factor then the
factors used by Carilli & Walter (2013ARA&A..51..105C 2013ARA&A..51..105C) are applied.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Ref Reference code
8- 26 A19 --- BibCode BibCode
28- 48 A21 --- Aut Author's name
49- 92 A44 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Jan-2015