Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Giant galaxy growing from recycled gas: ALMA maps the circumgalactic
  molecular medium of the Spiderweb in [CI]   The circumgalactic medium (CGM) of the massive Spiderweb Galaxy, a
conglomerate of merging proto-cluster galaxies at z=2.2, forms an enriched
interface where feedback and recycling act on accreted gas. This is shown by
observations of [CI], CO(1-0) and CO(4-3) performed with the Atacama Large
Millimeter Array (ALMA) and Australia Telescope Compact Array (ATCA). [CI] and
CO(4-3) are detected across ~50 kpc, following the distribution of previously
detected low-surface-brightness CO(1-0) across the CGM. This confirms our
previous results on the presence of a cold molecular halo. The central radio
galaxy MRC1138-262 shows a very high global $L'_{\rm CO(4-3)}$/$L'_{\rm
CO(1-0)}$ ~ 1, suggesting that mechanisms other than FUV-heating by star
formation prevail at the heart of the Spiderweb Galaxy. Contrary, the CGM has
$L'_{\rm CO(4-3)}$/$L'_{\rm CO(1-0)}$ and $L'_{\rm [CI]}$/$L'_{\rm CO(1-0)}$
similar to the ISM of five galaxies in the wider proto-cluster, and its carbon
abundance, $X_{\rm [CI]}$/$X_{\rm H2}$, resembles that of the Milky Way and
starforming galaxies. The molecular CGM is thus metal-rich and not diffuse,
confirming a link between the cold gas and in-situ star formation. Thus, the
Spiderweb Galaxy grows not directly through accretion of gas from the cosmic
web, but from recycled gas in the GCM.

30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga