Molecular gas and star formation within 12 strong galactic bars observed with IRAM-30 m
نویسندگان
چکیده
While some galactic bars show recent massive star formation (SF) along them, others present a lack of it. Whether with low level SF are consequence efficiency (SFE), gas inflow rate, or dynamical effects, remains matter debate. We perform multi-wavelength analysis 12 strongly barred galaxies, chosen to host different degrees the bar major axis without any prior condition on content. observe CO(1-0) and CO(2-1) emission within IRAM-30m telescope, which we use estimate molecular masses. rates (SFR) calculated from GALEX near- far- ultraviolet (UV) WISE 22 micron images beam pointings, covering full extent. detect all probed galaxies. The SFE in varies between galaxies by up an order magnitude. On average, SFEs roughly constant bars. not significantly mean value spiral reported literature. Interestingly, higher total stellar mass galaxy, lower their In particular, two our sample lowest SFR surface densities (NGC 4548 NGC 5850) also ones hosting bulges signs past interactions nearby companions. strong is systematically inhibited (either central, mid- end-parts bar). Both environmental internal quenching likely responsible for this work (Abridged).
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2021
ISSN: ['0004-6361', '1432-0746']
DOI: https://doi.org/10.1051/0004-6361/202140674