TY - JOUR
T1 - Late-type galaxies observed with SAURON
T2 - Two-dimensional stellar and emission-line kinematics of 18 spirals
AU - Ganda, Katia
AU - Falcón-Barroso, Jesús
AU - Peletier, Reynier F.
AU - Cappellari, Michele
AU - Emsellem, Eric
AU - McDermid, Richard M.
AU - Tim De Zeeuw, P.
AU - Carollo, C. Marcella
PY - 2006/3
Y1 - 2006/3
N2 - ABSTRACT We present the stellar and gas kinematics of a sample of 18 nearby late-type spiral galaxies (Hubble types ranging from Sb to Sd), observed with the integral-field spectrograph SAURON at the 4.2-m William Herschel Telescope. SAURON covers the spectral range 4800-5380 Å, allowing us to measure the Hβ, Fe, Mgb absorption features and the emission in the Hβ line and the [O iii]λλ4959, 5007 Å and [N i]λλ5198, 5200 Å doublets over a 33 × 41-arcsec2 field of view. The maps cover the nuclear region of these late-type galaxies and in all cases include the entire bulge. In many cases the stellar kinematics suggests the presence of a cold inner region, as visible from a central drop in the stellar velocity dispersion. The ionized gas is almost ubiquitous and behaves in a complicated fashion: the gas velocity fields often display more features than the stellar ones, including wiggles in the zero-velocity lines, irregular distributions, ring-like structures. The line ratio [O iii]/Hβ often takes on low values over most of the field, probably indicating a wide-spread star formation.
AB - ABSTRACT We present the stellar and gas kinematics of a sample of 18 nearby late-type spiral galaxies (Hubble types ranging from Sb to Sd), observed with the integral-field spectrograph SAURON at the 4.2-m William Herschel Telescope. SAURON covers the spectral range 4800-5380 Å, allowing us to measure the Hβ, Fe, Mgb absorption features and the emission in the Hβ line and the [O iii]λλ4959, 5007 Å and [N i]λλ5198, 5200 Å doublets over a 33 × 41-arcsec2 field of view. The maps cover the nuclear region of these late-type galaxies and in all cases include the entire bulge. In many cases the stellar kinematics suggests the presence of a cold inner region, as visible from a central drop in the stellar velocity dispersion. The ionized gas is almost ubiquitous and behaves in a complicated fashion: the gas velocity fields often display more features than the stellar ones, including wiggles in the zero-velocity lines, irregular distributions, ring-like structures. The line ratio [O iii]/Hβ often takes on low values over most of the field, probably indicating a wide-spread star formation.
KW - Galaxies: bulges
KW - Galaxies: evolution
KW - Galaxies: formation
KW - Galaxies: kinematics and dynamics
KW - Galaxies: spiral
UR - http://www.scopus.com/inward/record.url?scp=33644901769&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2005.09977.x
DO - 10.1111/j.1365-2966.2005.09977.x
M3 - Article
AN - SCOPUS:33644901769
SN - 0035-8711
VL - 367
SP - 46
EP - 78
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -