J/ApJ/724/1336 An extragalactic 12CO J=3-2 survey (Mao+, 2010)
An extragalactic 12CO J = 3-2 survey with the Heinrich Hertz telescope.
Mao R.-Q., Schulz A., Henkel C., Mauersberger R., Muders D., Dinh-V-Trung
<Astrophys. J., 724, 1336-1356 (2010)>
=2010ApJ...724.1336M 2010ApJ...724.1336M
ADC_Keywords: Active gal. nuclei ; Radio lines ; Galaxies, IR ; Surveys
Keywords: evolution - galaxies: active - galaxies: ISM - galaxies: starburst -
ISM: molecules - radio lines: galaxies - surveys
Abstract:
We present results of a 12COJ=3-2 survey of 125 nearby galaxies
obtained with the 10m Heinrich Hertz Telescope, with the aim to
characterize the properties of warm and dense molecular gas in a large
variety of environments. With an angular resolution of 22", 12CO3-2
emission was detected in 114 targets. Based on 61 galaxies observed
with equal beam sizes the 12CO3-2/1-0 integrated line intensity
ratio R31 is found to vary from 0.2 to 1.9, with an average value of
0.81. No correlations are found for R31 to Hubble-type and
far-infrared luminosity. Possible indications for a correlation with
inclination angle and the 60um/100um color temperature of the dust are
not significant. Higher R31 ratios than in "normal" galaxies,
hinting at enhanced molecular excitation, may be found in galaxies
hosting active galactic nuclei. Even higher average values are
determined for galaxies with bars or starbursts, the latter being
identified by the ratio of infrared luminosity versus isophotal area,
log [(LFIR/L☉)/(D225/kpc2)]>7.25. (U)LIRGs are found to
have the highest averaged R31 value. This may be a consequence of
particularly vigorous star formation activity, triggered by galaxy
interaction and merger events.
Description:
All the CO(3-2) observations were conducted with the 10m Heinrich
Hertz Telescope (HHT) on Mt. Graham/Arizona with a beam width of 22".
Most of our galaxies were observed during 1999 February, April, and
November, and 2000 January and March. The majority of the
merging/interacting galaxies was observed in 2003, 2004, and 2005
March.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 114 130 HHT extragalactic CO(3-2) survey sample and
galaxy properties (10m Heinrich Hertz Telescope)
table3.dat 108 130 Observed quantities of the HHT extragalactic
CO J=3-2 survey
refs.dat 42 31 References
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See also:
II/156 : IRAS Faint Source Catalog, |b| > 10, Version 2.0 (Moshir+ 1989)
VII/64 : CO Observations of Galaxies (Verter 1985)
J/AJ/127/3235 : HIRES atlas of all RBGS galaxies (Surace+, 2004)
J/AJ/126/1607 : IRAS Revised Bright Galaxy Sample (Sanders+, 2003)
J/A+A/399/1083 : Outer Galaxy IRAS sources and 12CO emission (Kerton+, 2003)
J/A+A/411/381 : CO observation of isolated galaxies (Sauty+, 2003)
J/ApJS/141/157 : CO (J=1-0) data of cold IRAS sources (Yang+, 2002)
J/A+AS/126/3 : CO and HI in interacting galaxies (Horellou+ 1997)
J/A+AS/115/439 : CO survey of galaxies (Elfhag+, 1996)
J/A+AS/116/193 : CO survey of spirals in Coma supercluster (Casoli+, 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq ? Sequence number of the specific source
5- 18 A14 --- Name Galaxy designation
19 A1 --- f_Name [pv] Flag on Name (p: galaxy pair or
v: Virgo Cluster galaxy)
21- 22 I2 h RAh Hour of right ascension (J2000)
24- 25 I2 min RAm Minute of right ascension (J2000)
27- 30 F4.1 s RAs Second of right ascension (J2000)
32 A1 --- DE- Sign of declination (J2000)
33- 34 I2 deg DEd Degree of declination (J2000)
36- 37 I2 arcmin DEm Arcminute of declination (J2000)
39- 40 I2 arcsec DEs Arcsecond of declination (J2000)
42- 46 I5 km/s HRV ? NED heliocentric velocity
48- 52 F5.1 Mpc Dist ? Galaxy proper distance (1)
53 A1 --- f_Dist [a] Note on Dist (2)
55- 60 F6.2 arcmin D25 ? Optical diameter (D25) from NED
62- 63 I2 deg i ? Galaxy inclination angle from HyperLEDA
65- 69 F5.1 mag BMag ? HyperLEDA absolute B-band magnitude
71- 74 F4.1 [Lsun] logLFIR ? Log of FIR luminosity (3)
75 A1 --- f_logLFIR [bc] Note on logLFIR (2)
77- 80 F4.1 K Tdust ? Dust temperature (4)
81 A1 --- f_Tdust [bc] Note on Tdust (2)
83 A1 --- C [SNLU] This paper galaxy classification:
starburst, normal, LIRG or ULIRG (5)
85- 88 F4.1 --- T ? Morphological type from HyperLEDA
90-114 A25 --- Class Galaxy classification from NED
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Note (1): The Galaxy proper distance calculated from HRV using H0=73km/s/Mpc
and adopting a flat cosmology with ΩM=0.27 and
ΩΛ=0.73.
Note (2): Flag as follows:
a = Recently measured distances drawn mostly from a crosslink in NED
(cf. NED 1D for references). The distance to Virgo Cluster galaxies is
set to 16.5Mpc (Mei et al. 2007ApJ...655..144M 2007ApJ...655..144M).
b = Calculated with infrared fluxes taken from Surace et al.
(2004, Cat. J/AJ/127/3235) where the HIRES processing is adopted allowing
for a deconvolution of close galaxy pairs.
c = Sources not included in the RBGS (Sanders et al. 2003, Cat. J/AJ/126/1607)
Note (3): FIR luminosity (LFIR=L(40-400um)) calculated following the
prescription of Moshir et al. (1992, Cat. II/156; see Section 2.2.1).
Note (4): Dust temperature (Tdust) derived from the IRAS 60um/100um color
assuming an emissivity that is proportional to the frequency ν.
Note (5): Galaxy classification from this paper as follows:
N = normal;
S = starburst;
L = Luminous infra-red galacy (LIRG);
U = Ultra-luminous infra-red galacy (ULIRG).
(blank) = all the rest are "pure" AGN (see Section 2.2.2).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq ? Sequence number
5- 18 A14 --- Name Galaxy name
20 A1 --- l_I32 Limit flag on I32
21- 26 F6.1 K.km/s I32 CO(3-2) (345.796GHz) line intensity
(I32=∫Tmbdv)
28- 30 F3.1 K.km/s e_I32 ? I32 uncertainty (1)
31 A1 --- f_I32 [*] Flag on I32 (unexplained)
33- 37 I5 km/s Nu32 ? LSR velocity
39- 40 I2 km/s e_Nu32 ? Nu32 uncertainty (1)
42 A1 --- f_Del32 [(] (: non-detection (2)
43- 45 I3 km/s Del32 CO(3-2) width (FWHM) or CO(1-0) if
flagged
47- 48 I2 km/s e_Del32 ? Del32 uncertainty (1)
50 A1 --- f_Tmb [(] (: non-detection (2)
51- 54 I4 mK Tmb Main beam brightness temperature
56- 58 I3 mK e_Tmb ? Tmb uncertainty
60 A1 --- l_logL32 Limit flag on logL32
61- 64 F4.1 [K.km/s.pc2] logL32 CO(3-2) luminosity (3)
66- 69 F4.2 [K.km/s.pc2] e_logL32 ? logL32 uncertainty
71 A1 --- l_logL10 Limit flag on logL10
72- 75 F4.1 [K.km/s.pc2] logL10 ? CO(1-0) luminosity (4)
77- 79 F3.1 [K.km/s.pc2] log2 ? Second value of logL10
81- 84 F4.2 [K.km/s.pc2] e_logL10 ? logL10 uncertainty
86 A1 --- l_R31 Limit flag on R31
87- 89 F3.1 --- R31 ? CO(3-2)/CO(1-0) line intensity ratio
R31
90 A1 --- f_R31 [a] Flag on R31 (unexplained)
91 A1 --- l_R31b Limit flag on R31b
92- 94 F3.1 --- R31b ? Second value of R31
96- 99 F4.2 --- e_R31 ? R31 uncertainty
101-105 A5 --- Ref ? Reference(s) for logL10 and R31 (see
refs.dat file)
106-108 A3 --- Tel [a-g, ] Origin of data (5)
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Note (1): The standard errors from Gaussian fits or from *moments in the case
of non-Gaussian line shapes.
Note (2): Non-detections are listed with their rms noise level σ at a
channel spacing of δν∼6.6km/s. In these cases the full width
of the CO(1-0) line was estimated from spectra taken from the
literature or was set to 400km/s; corresponding upper limits for I32
were obtained using I32<3σx(ΔV10xδν)1/2.
Note (3): The CO(3-2) luminosity is calculated with Equation (1) (see
Section 4.1) for a beam of Θmb=22".
Note (4): The CO(1-0) luminosity calculated with an equation similar to that of
LCO(3-2) for galaxies with IRAM 30m CO(1-0) data available in the
literature (see col. Ref); otherwise either upper or lower limits are
given, depending on the telescope used for CO(1-0).
Note (5): Telescopes used are as follows:
a = IRAM-30m;
b = FCRAO-14m;
c = NRAO-12m;
d = NRO-45m;
e = OSO 20m
g = The CO(1-0) data were taken at an offset position >5" relative to our
CO(3-2) position.
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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- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode Bibcode
24- 42 A19 --- Aut First author's name
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 03-Aug-2012