Cold gas in a complete sample of group-dominant early-type galaxies

E. O’Sullivan; F. Combes; P. Salomé; L.P. David; A. Babul; J. M. Vrtilek; J. Lim; V. Olivares; S. Raychaudhury; G. Schellenberger

doi:10.1051/0004-6361/201833580

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Volume 618 (October 2018)

A&A, 618 (2018) A126

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Table 2.

Molecular data and stellar mass of the newly detected galaxies.

Galaxy	Line	I_CO K km s⁻¹	V km s⁻¹	Δ V^a km s⁻¹	T_mb^b mK	K km s⁻¹ pc²	M(H₂)^c 10⁸ M_⊙
IRAM 30 m observations
NGC 924	CO(1-0)	<0.49	–	300	1.34 rms	<0.24	<1.11
	CO(2-1)	0.92 ± 0.18	−44.3 ± 33.4	363.1 ± 86.6	2.4 ± 0.8	0.11 ± 0.02	0.52 ± 0.10
NGC 4169	CO(1-0)	0.81 ± 0.19	−75.2 ± 51.3	399.6 ± 98.8	1.9 ± 0.9	0.31 ± 0.07	1.44 ± 0.34
	CO(2-1)	0.95 ± 0.17	52.9 ± 32.6	353.7 ± 75.3	2.5 ± 0.5	0.09 ± 0.02	0.42 ± 0.08
NGC 5353	CO(1-0)	2.71 ± 0.36	−32.7 ± 44.9	655.4 ± 94.6	3.9 ± 1.3	0.41 ± 0.06	1.90 ± 0.25
	CO(2-1)	7.61 ± 0.43	−87.8 ± 20.9	700.1 ± 40.7	10.2 ± 1.6	0.29 ± 0.02	1.33 ± 0.08
NGC 5354	CO(1-0)	−0.90 ± 0.18	−132.8 ± 4.6	45.0 ± 11.0	−18.9 ± 2.9	−0.14 ± 0.03	–
	CO(2-1)	−0.71 ± 0.15	−84.7 ± 5.6	49.7 ± 12.7	−13.5 ± 0.5	−0.03 ± 0.01	–
NGC 128-HI^d	CO(1-0)	0.92 ± 0.10	−218.9 ± 7.1	134.6 ± 16.0	6.5 ± 0.8	0.38 ± 0.04	1.76 ± 0.18
	CO(2-1)	0.43 ± 0.13	−197.1 ± 19.0	118.7 ± 29.8	3.4 ± 0.7	0.04 ± 0.01	0.20 ± 0.06
NGC 252	CO(1-0)	2.21 ± 0.28	110.4 ± 14.6	239.0 ± 34.7	8.7 ± 1.3	1.37 ± 0.17	6.29 ± 0.79
	CO(2-1)	<0.75	–	300	2.03 rms	<0.11	<0.53
NGC 1106	CO(1-0)	3.07 ± 0.15	−133.3 ± 2.8	250.8 ± 17.6	21.2 ± 0.8	1.48 ± 0.07	6.81 ± 0.33
	CO(2-1)	2.34 ± 0.22	−134.7 ± 13.2	252.6 ± 29.7	8.7 ± 1.3	0.28 ± 0.03	1.30 ± 0.12
NGC 2911	CO(1-0)	2.27 ± 0.26	18.5 ± 27.6	455.2 ± 50.4	4.7 ± 1.3	0.58 ± 0.07	2.66 ± 0.31
	CO(2-1)	6.00 ± 0.42	44.5 ± 20.2	563.0 ± 41.1	10.0 ± 1.9	0.38 ± 0.03	1.75 ± 0.12
NGC 4636	CO(1-0)	<0.22	–	300	0.61 rms	<0.005	<0.023
	CO(2-1)	0.38 ± 0.12	88.6 ± 56.7	304.5 ± 98.7	1.2 ± 0.6	0.002 ± 0.001	0.010 ± 0.003
NGC 5846	CO(1-0)	0.46 ± 0.20	−80.1 ± 134.3	581.8 ± 377.1	0.7 ± 0.6	0.03 ± 0.01	0.14 ± 0.06
	CO(2-1)	0.47 ± 0.14	−75.9 ± 51.3	334.9 ± 91.9	1.3 ± 0.7	0.008 ± 0.002	0.04 ± 0.01
APEX observations
ESO 507-25	CO(2-1)	1.91 ± 0.25	18.0 ± 33.0	472.0 ± 65.0	2.4 ± 0.9	0.92 ± 0.12	4.23 ± 0.56
NGC 1779	CO(2-1)	2.13 ± 0.28	22.0 ± 29.0	434.0 ± 55.0	4.7 ± 1.1	0.99 ± 0.13	4.57 ± 0.60
NGC 7377	CO(2-1)	2.00 ± 0.19	−33.0 ± 10.0	221.0 ± 20.0	8.9 ± 1.5	1.03 ± 0.10	4.74 ± 0.44

Notes. Results of the Gaussian fits. For each object observed with the IRAM 30 m, the first line displays the CO(1-0) and the second line the CO(2-1) results.

^(a)

FWHM.

^(b)

Peak brightness temperature.

^(c)

Obtained with the standard MW conversion ratio. In the two cases where only one transition was detected, the table shows the rms T_mb for 50 km s⁻¹ channels and 3σ upper limits on other parameters, assuming Δ V of 300 km s⁻¹.

^(d)

Detected values for the NGC 128 offset pointing in the H I bridge.

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