Molecular gas in Arp 94

Implications for intergalactic star formation

Ute Lisenfeld, Carole Mundell, James Allsopp, Eva Schinnerer

Research output: Contribution to journalReview article

1 Citation (Scopus)

Abstract

We present 12CO(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 30 m 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.

Original languageEnglish
Pages (from-to)63-66
Number of pages4
JournalNew Astronomy Reviews
Volume51
Issue number1-2
DOIs
Publication statusPublished - 1 Feb 2007

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molecular gases
star formation
hydrogen clouds
gas
interacting galaxies
Seyfert galaxies
dwarf galaxies
metallicity
tracers
actuators
telescopes
stars
tracer
hydrogen
gases

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Molecular gas in Arp 94 : Implications for intergalactic star formation. / Lisenfeld, Ute; Mundell, Carole; Allsopp, James; Schinnerer, Eva.

In: New Astronomy Reviews, Vol. 51, No. 1-2, 01.02.2007, p. 63-66.

Research output: Contribution to journalReview article

Lisenfeld, Ute ; Mundell, Carole ; Allsopp, James ; Schinnerer, Eva. / Molecular gas in Arp 94 : Implications for intergalactic star formation. In: New Astronomy Reviews. 2007 ; Vol. 51, No. 1-2. pp. 63-66.
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