MusE GAs FLOw and Wind (MEGAFLOW) VII. A NOEMA pilot program to probe molecular gas in galaxies with measured circumgalactic gas flows. (arXiv:2012.04667v2 [astro-ph.GA] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Freundlich_J/0/1/0/all/0/1">Jonathan Freundlich</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bouche_N/0/1/0/all/0/1">Nicolas F. Bouché</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Contini_T/0/1/0/all/0/1">Thierry Contini</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Daddi_E/0/1/0/all/0/1">Emanuele Daddi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zabl_J/0/1/0/all/0/1">Johannes Zabl</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schroetter_I/0/1/0/all/0/1">Ilane Schroetter</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Boogaard_L/0/1/0/all/0/1">Leindert Boogaard</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Richard_J/0/1/0/all/0/1">Johan Richard</a>
We present a pilot program using IRAM’s NOrthern Extended Millimeter Array
(NOEMA) to probe the molecular gas reservoirs of six $z=0.6-1.1$ star-forming
galaxies whose circumgalactic medium has been observed in absorption along
quasar lines-of-sight as part of the MusE GAs FLOw and Wind (MEGAFLOW) survey
and for which we have estimates of either the accretion or the outflow rate.
This program is motivated by testing the quasi equilibrium model and the
compaction scenario describing the evolution of galaxies along the main
sequence of star formation, which imply tight relations between the gas
content, the star formation activity, and the amount of gas flowing in and out.
We report individual carbon monoxide CO(4-3), CO(3-2) and dust continuum upper
limits, as well as stacked CO detections over the whole sample and the three
galaxies identified with outflows. The resulting molecular gas fractions and
depletion times are compatible with published scaling relations established
within a mass-selected sample, indicating that galaxies selected through their
absorption follow similar relations on average. We further detect the dust
continuum of three of the quasars and a strong emission line in one of them,
which we identify as CO(4-3). Extending the sample to more galaxies and deeper
observations will enable to quantify how the molecular gas fraction and
depletion time depend on the inflow and ouflow rates.
We present a pilot program using IRAM’s NOrthern Extended Millimeter Array
(NOEMA) to probe the molecular gas reservoirs of six $z=0.6-1.1$ star-forming
galaxies whose circumgalactic medium has been observed in absorption along
quasar lines-of-sight as part of the MusE GAs FLOw and Wind (MEGAFLOW) survey
and for which we have estimates of either the accretion or the outflow rate.
This program is motivated by testing the quasi equilibrium model and the
compaction scenario describing the evolution of galaxies along the main
sequence of star formation, which imply tight relations between the gas
content, the star formation activity, and the amount of gas flowing in and out.
We report individual carbon monoxide CO(4-3), CO(3-2) and dust continuum upper
limits, as well as stacked CO detections over the whole sample and the three
galaxies identified with outflows. The resulting molecular gas fractions and
depletion times are compatible with published scaling relations established
within a mass-selected sample, indicating that galaxies selected through their
absorption follow similar relations on average. We further detect the dust
continuum of three of the quasars and a strong emission line in one of them,
which we identify as CO(4-3). Extending the sample to more galaxies and deeper
observations will enable to quantify how the molecular gas fraction and
depletion time depend on the inflow and ouflow rates.
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