Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..220..319s&link_type=abstract
International Astronomical Union Symposium no. 220, held 21 - 25 July, 2003 in Sydney, Australia. Eds: S. D. Ryder, D. J. Pisano
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the results of a high-resolution CO-line survey using the Nobeyama Millimeter-wave Array at high-angular (˜ 2 - 3'') and high spectral resolutions for the 15 CO-richest Virgo spirals. We derived exact rotation curves using position-velocity diagrams by applying the iteration method. The obtained RCs rise steeply in the central 100 pc. Surface-mass-density distributions by direct deconvolution of the RCs show massive cores of ˜ 10^9 M&sun; within 100 pc, suggesting the existence of DM cusps in the centres. Five galaxies were found to nest single-peaked extremely high-density molecular cores, where star formation is currently suppressed by the high differential rotation. We show that the deeper is the gravitational potential, the higher is the central gas density.
Koda Jin
Kohno Kotaro
Nakanishi Hiizu
Onodera Sachiko
Sofue Yoshiaki
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