TY - JOUR
T1 - Stellar kinematics and populations of early-type galaxies with the SAURON and OASIS integral-field spectrographs
AU - McDermid, Richard M.
AU - Bacon, Roland
AU - Kuntschner, Harald
AU - Emsellem, Eric
AU - Shapiro, Kristen L.
AU - Bureau, Martin
AU - Cappellari, Michele
AU - Davies, Roger L.
AU - Falcón-Barroso, Jesús
AU - Krajnović, Davor
AU - Peletier, Reynier F.
AU - Sarzi, Marc
AU - de Zeeuw, Tim
PY - 2006/1
Y1 - 2006/1
N2 - We summarise the results and achievements of integral-field spectroscopy of early-type galaxies, observed as part of a survey using both the SAURON and OASIS spectrographs. From the perspective of integral-field spectroscopy, these otherwise smooth and featureless objects show a wealth of structure, both in their stellar kinematics and populations. We focus on the stellar content, and examine properties on both kiloparsec scales with SAURON, and scales of 100's of parsecs with OASIS. These complementary studies reveal two types of kinematically distinct components (KDCs), differing primarily in their intrinsic sizes. In previous studies, KDCs and their host galaxies have generally been found to be unremarkable in other aspects. We show that large KDCs, typical of the well-studied cases, indeed show little or no age differences with their host galaxy. The KDCs detected with the higher spatial-resolution of OASIS are intrinsically smaller and include, in contrast, a significant fraction of young stars. We speculate on the relationship between KDCs and their host galaxies, and the implications for young populations in early-type galaxies.
AB - We summarise the results and achievements of integral-field spectroscopy of early-type galaxies, observed as part of a survey using both the SAURON and OASIS spectrographs. From the perspective of integral-field spectroscopy, these otherwise smooth and featureless objects show a wealth of structure, both in their stellar kinematics and populations. We focus on the stellar content, and examine properties on both kiloparsec scales with SAURON, and scales of 100's of parsecs with OASIS. These complementary studies reveal two types of kinematically distinct components (KDCs), differing primarily in their intrinsic sizes. In previous studies, KDCs and their host galaxies have generally been found to be unremarkable in other aspects. We show that large KDCs, typical of the well-studied cases, indeed show little or no age differences with their host galaxy. The KDCs detected with the higher spatial-resolution of OASIS are intrinsically smaller and include, in contrast, a significant fraction of young stars. We speculate on the relationship between KDCs and their host galaxies, and the implications for young populations in early-type galaxies.
KW - cD- galaxies: Stellar content
KW - Galaxies: Elliptical and lenticular
UR - http://www.scopus.com/inward/record.url?scp=30444457561&partnerID=8YFLogxK
U2 - 10.1016/j.newar.2005.10.025
DO - 10.1016/j.newar.2005.10.025
M3 - Review article
AN - SCOPUS:30444457561
SN - 1387-6473
VL - 49
SP - 521
EP - 535
JO - New Astronomy Reviews
JF - New Astronomy Reviews
IS - 10-12
ER -