The Atlas3D project – V. The CO Tully-Fisher relation of early-type galaxies

Дата и время публикации : 2011-02-23T23:30:19Z

Авторы публикации и институты :
Timothy A. Davis
Martin Bureau
Lisa M. Young
Katherine Alatalo
Leo Blitz
Michele Cappellari
Nicholas Scott
Maxime Bois
Frederic Bournaud
Roger L. Davies
P. Tim de Zeeuw
Eric Emsellem
Sadegh Khochfar
Davor Krajnovic
Harald Kuntschner
Pierre-Yves Lablanche
Richard M. McDermid
Raffaella Morganti
Thorsten Naab
Tom Oosterloo
Marc Sarzi
Paolo Serra
Anne-Marie Weijmans

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 17 pages, 7 figures, MNRAS accepted
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO

Краткий обзор статьи: We demonstrate here using both single-dish and interferometric observations that CO molecules are an excellent kinematic tracer, even in high-mass galaxies, allowing us to investigate for the first time the CO Tully-Fisher relation of early-type galaxies. We compare the Tully-Fisher relations produced using both single-dish and interferometric data and various inclination estimation methods, and evaluate the use of the velocity profile shape as a criterion for selecting galaxies in which the molecular gas extends beyond the peak of the rotation curve. We show that the gradient and zero-point of the best-fit relations are robust, independent of the velocity measure and inclination used, and agree with those of relations derived using stellar kinematics. We also show that the early-type CO Tully-Fisher (CO-TF) relation is offset from the CO-TF of spirals by 0.98 pm 0.22 magnitude at Ks-band, in line with other results. The intrinsic scatter of the relation is found to be approx 0.4 magnitudes, similar to the level found in the spiral galaxy population. Next generation facilities such as the Large Millimeter Telescope (LMT) and the Atacama Large Millimeter/Sub-millimeter Array (ALMA) should allow this technique to be used in higher-redshift systems, providing a simple new tool to trace the mass-to-light ratio evolution of the most massive galaxies over cosmic time.

Category: Physics