Abstract
Abstract
We present the results of surveying [C i] 3
P
1–3
P
0, 12CO J = 4 − 3, and 630 μm dust continuum emission for 36 nearby ultra/luminous infrared galaxies (U/LIRGs) using the Band 8 receiver mounted on the Atacama Compact Array of the Atacama Large Millimeter/submillimeter Array. We describe the survey, observations, data reduction, and results; the main results are as follows. (i) We confirmed that [C i] 3
P
1–3
P
0 has a linear relationship with both the 12CO J = 4 − 3 and 630 μm continuum. (ii) In NGC 6052 and NGC 7679, 12CO J = 4 − 3 was detected but [C i] 3
P
1–3
P
0 was not detected with a [C i] 3
P
1–3
P
0/12CO J = 4 − 3 ratio of ≲0.08. Two possible scenarios of weak [C i] 3
P
1–3
P
0 emission are C0-poor/CO-rich environments and an environment with an extremely large [C i] 3
P
1–3
P
0 missing flux. (iii) There is no clear evidence showing that galaxy mergers, AGNs, and dust temperatures control the ratios of [C i] 3
P
1–3
P
0/12CO J = 4 − 3 and
L
[
C
I
]
(
1
−
0
)
′
/
L
630
μ
m
. (iv) We compare our nearby U/LIRGs with high-z galaxies, such as galaxies on the star formation main sequence (MS) at z ∼ 1 and submillimeter galaxies (SMGs) at z = 2–4. We found that the mean value for the [C i] 3
P
1–3
P
0/12CO J = 4 − 3 ratio of U/LIRGs is similar to that of SMGs but smaller than that of galaxies on the MS.
Funder
National Science Foundation of China
National Key R&D Program of China
Publisher
American Astronomical Society
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
9 articles.
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