J/A+A/412/657 CO in cooling flow of clusters of galaxies (Salome+, 2003)
Cold molecular gas in cooling flow clusters of galaxies.
Salome P., Combes F.
<Astron. Astrophys. 412, 657 (2003)>
=2003A&A...412..657S 2003A&A...412..657S
ADC_Keywords: Clusters, galaxy ; Redshifts ; Carbon monoxide
Keywords: galaxies: clusters: general - galaxies: cooling flows - galaxies: ISM
Abstract:
The results of a CO line survey in central cluster galaxies with
cooling flows are presented. Cold molecular gas is detected with the
IRAM 30m telescope, through CO(1-0) and CO(2-1) emission lines in 6-10
among 32 galaxies. The corresponding gas masses are between 3x108
and 4x1010M_☉. These results are in agreement with recent CO
detections by Edge (2001MNRAS.328..762E 2001MNRAS.328..762E). A strong correlation between
the CO emission and the Hα luminosity is also confirmed. Cold
gas exists in the center of cooling flow clusters and these detections
may be interpreted as evidence of the long searched for very cold
residual of the hot cooling gas.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 32 Sample of cooling flow clusters of galaxies
observed with the IRAM 30m telescope.
table23.dat 73 55 Summary of observational data for the two runs
(tables 2 and 3 of the paper)
table4.dat 71 32 Derived parameters of the observed sources
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Source Source name
13 A1 --- n_Source [*] *: Sources observed in the second
run (August)
15- 21 F7.5 --- z Redshift
23- 24 I2 h RAh Right ascension (J2000)
26- 27 I2 min RAm Right ascension (J2000)
29- 32 F4.1 s RAs Right ascension (J2000)
34 A1 --- DE- Declination sign (J2000)
35- 36 I2 deg DEd Declination (J2000)
38- 39 I2 arcmin DEm Declination (J2000)
41- 44 F4.1 arcsec DEs Declination (J2000)
46- 51 F6.2 GHz Freq1 Central frequency in CO(1-0)
54- 56 I3 min ExpTime1 Exposure time in in CO(1-0)
58- 63 F6.2 GHz Freq2 ? Central frequency in CO(2-1)
65- 67 I3 min ExpTime2 ? Exposure time in in CO(2-1)
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Byte-by-byte Description of file: table23.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Source Source name
13 A1 --- n_Source [*] *: Sources observed in the second
run (August)
14- 20 A7 --- Line Line (CO(1-0) or CO(2-1))
22- 25 F4.1 mK Peak ? Peak of the Gaussian fit
28- 31 F4.2 mK e_Peak ? rms uncertainty on Peak
33- 36 F4.2 mK rms rms of the Gaussian fit
38- 41 A4 --- f_Line Line detection flag
43- 46 I4 km/s LinePos ? Line position
49- 50 I2 km/s e_LinePos ? rms uncertainty on LinePos
52- 54 I3 km/s LineWidth Line width
55 A1 --- n_LineWidth [*] * line width assumed to 300km/s
57- 59 I3 km/s e_LineWidth ? rms uncertainty on LineWidth
61- 62 A2 --- l_ICO [≤ ] Limit flag on ICO
63- 66 F4.2 K.km/s ICO CO intensity
68- 72 F5.3 K.km/s e_ICO ? rms uncertainty on ICO
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Source Source name
14- 15 A2 --- l_M(H2) [≤ ] Limit flag on M(H2)
16- 22 E7.2 solMass M(H2) H2 mass
24- 30 E7.2 solMass e_M(H2) ? rms uncertainty on M(H2)
32- 39 E8.2 solMass Mdust ? Dust mass (1)
41- 47 E7.2 10-7W L(Ha) ? Hα luminosity, from Crawford et al.,
1999MNRAS.306..857C 1999MNRAS.306..857C
49- 52 I4 solMass/yr dM/dt ? Mass loss rate from Peres et al.,
1998MNRAS.298..416P 1998MNRAS.298..416P
54- 56 I3 kpc Rcool ? Cooling radius from Peres et al.,
1998MNRAS.298..416P 1998MNRAS.298..416P
58- 60 I3 solMass/yr dM/dt2 ? Mass loss rate from White et al.,
1997MNRAS.292..419W 1997MNRAS.292..419W
62- 64 I3 kpc Rcool2 ? Cooling radius from White et al.,
1997MNRAS.292..419W 1997MNRAS.292..419W
66- 70 I5 mJy F1.4GHz ? Flux density at 1.4GHz
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Note (1): Dust masses are evaluated from 60µm data compiled in Edge
(2001MNRAS.328..762E 2001MNRAS.328..762E), assuming Tdust=35K.
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History:
From electronic version of the journal
(End) Patricia Bauer [CDS] 09-Dec-2003