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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/28408

Title: Molecular gas in Arp 94: implications for intergalactic star formation
Authors: Lisenfeld, Ute
Mundell, C.
Allsopp, J.
Schinnerer, Eva
Issue Date: 2006
Abstract: We present CO(1-0) observations of the interacting galaxy system Arp 94, which contains the Seyfert galaxies NGC 3227 and NGC 3226 as well as the star-forming candidate dwarf galaxy J1023+1952. We mapped the CO distribution in J1023+1952 with the IRAM 30m telescope and found molecular gas across the entire extent of the neutral hydrogen cloud – an area of about 9 by 6 kpc. The region where star formation (SF) takes place is restricted to a much smaller (∼ 1.5 by 3 kpc) region in the south where the narrow line width of the CO shows that the molecular gas is dynamically cold. Neither the molecular nor the total gas surface density in the SF region are significantly higher than in the rest of the object suggesting that an external trigger is causing the SF. The fact that CO is abundant and apparently a good tracer for the molecular gas in J1023+1952 indicates that its metallicity is relatively high and argues for a tidal origin of this object.
Publisher: Elsevier B.V.
Keywords: Galaxies
Star formation
Molecular gas
Arp 94
URI: http://hdl.handle.net/10481/28408
ISSN: 1387-6473
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Lisenfeld, U.; et al. Molecular gas in Arp 94: implications for intergalactic star formation. New Astronomy Reviews, 51(1-2): 63-66 (2007). [http://hdl.handle.net/10481/28408]
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