Limits on the cool gas content of NGC 1275 and M 87

Details Limits on the cool gas content of NGC 1275 and M 87 Limits on the cool gas content of NGC 1275 and M 87

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...171..378j&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 171, no. 1-2, Jan. 1987, p. 378, 379.

Astronomy and Astrophysics

Astrophysics

21

Carbon Monoxide, Cooling Flows (Astrophysics), Cosmic Gases, Elliptical Galaxies, Galactic Structure, Molecular Gases, Radio Spectra, Centimeter Waves, Millimeter Waves, Star Formation

Scientific paper

New 2.6 mm CO observations and existing 21 cm observations are used to set upper limits on the mass of cool gas present in the ellipticals NGC 1275 and M87. The CO limits are lower than expected from the cooling flows present in these galaxies if the gas passes through a molecular phase. The most likely explanation for this is the lack of grains necessary to form molecules. The H I limit seems consistent with isobaric cooling of the gas to about 30K, but the eventual formation of stars from this gas probably occurs along a path quite different from that followed by galactic stars.

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