SIMBAD references

1998ApJ...509L..89T - Astrophys. J., 509, L89-L92 (1998/December-3)

What controls the star formation in luminous starburst mergers?


Abstract (from CDS):

In order to understand what controls the star formation process in luminous starburst mergers (e.g., NGC 6240, Arp 220, and so on), we investigate observational properties of two samples of high-luminosity starburst galaxies mapped in CO J=1-0 independently using both the Owens Valley Radio Observatory (Scoville et al.) and the IRAM interferometer (Downes & Solomon). We find that the surface density of far-infrared luminosity, Σ(FIR), is proportional linearly to the H2 surface mass density, Σ(H2), for the two samples; ΣFIR∝ΣH21.01±0.06 with a correlation coefficient of 0.96. It is often considered that Σ(FIR) provides a good measure of the star formation rate per unit area, Σ(SFR). It is also known that molecular gas is dominated in circumnuclear regions in the luminous starburst mergers; i.e., Σgas≃ΣH2. Therefore, the above relationship suggests a star formation law; ΣSFR∝Σgas. We suggest that this star formation law favors the gravitational instability scenario rather than the cloud-cloud collision one.

Abstract Copyright:

Journal keyword(s): Galaxies: Starburst - ISM: Molecules - Stars: Formation

Simbad objects: 29

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