Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/j.1365-2966.2006.11065.x |
The SAURON project - VIII. OASIS/CFHT integral-field spectroscopy of elliptical and lenticular galaxy centres | |
McDermid, Richard M.; Emsellem, Eric; Shapiro, Kristen L.; Bacon, Roland; Bureau, Martin; Cappellari, Michele; Davies, Roger L.; de Zeeuw, Tim; Falcon-Barroso, Jesus; Krajnovic, Davor; Kuntschner, Harald; Peletier, Reynier F.; Sarzi, Marc | |
通讯作者 | McDermid, Richard M. |
来源期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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ISSN | 0035-8711 |
EISSN | 1365-2966 |
出版年 | 2006 |
卷号 | 373期号:3页码:906-958 |
英文摘要 | We present high spatial resolution integral-field spectroscopy of 28 elliptical (E) and lenticular (SO) galaxies from the SAURON representative survey obtained with the OASIS spectrograph during its operation at the Canada-France-Hawaii Telescope. These seeing-limited observations explore the central 8 x 10 arcsec(2) (typically 1 kpc diameter) regions of these galaxies using a spatial sampling four times higher than SAURON (0.27-arcsec versus 0.94-arcsec spatial elements), resulting in almost a factor of 2 improvement in the median point spread function. These data allow accurate study of the central regions to complement the large-scale view provided by SAURON. Here we present the stellar and gas kinematics, stellar absorption-line strengths and nebular emission-line strengths for this sample. We also characterize the stellar velocity maps using the ’kinemetry’ technique, and derive maps of the luminosity-weighted stellar age, metallicity and abundance ratio via stellar population models. We give a brief review of the structures found in our maps, linking also to larger-scale structures measured with SAURON. We present two previously unreported kinematically decoupled components (KDCs) in the centres of NGC 3032 and NGC 4382. We compare the intrinsic size and luminosity-weighted stellar age of all the visible KDCs in the full SAURON sample, and find two types of components: kiloparsec-scale KDCs, which are older than 8 Gyr, and are found in galaxies with little net rotation; and compact KDCs, which have intrinsic diameters of less than a few hundred parsec, show a range of stellar ages from 0.5 to 15 Gyr (with 5/6 younger than 5 Gyr), are found exclusively in fast-rotating galaxies, and are close to counter-rotating around the same axis as their host. Of the seven galaxies in the SAURON sample with integrated luminosity-weighted ages less than 5 Gyr, five show such compact KDCs, suggesting a link between counter-rotation and recent star formation. We show that this may be due to a combination of small sample size at young ages, and an observational bias, since young KDCs are easier to detect than their older and/or corotating counterparts. |
英文关键词 | galaxies : elliptical and lenticular cD galaxies : evolution galaxies : formation galaxies : ISM galaxies : kinematics and dynamics galaxies : structure |
类型 | Review |
语种 | 英语 |
国家 | Netherlands ; France ; USA ; England ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000243152900002 |
WOS关键词 | HUBBLE-SPACE-TELESCOPE ; KINEMATICALLY DISTINCT CORES ; OLD STELLAR POPULATIONS ; ABSORPTION-LINE SPECTRA ; BLACK-HOLE MASS ; SIGHT VELOCITY DISTRIBUTIONS ; DWARF SEYFERT NUCLEI ; GLOBULAR-CLUSTERS ; SPIRAL GALAXIES ; SURFACE PHOTOMETRY |
WOS类目 | Astronomy & Astrophysics |
WOS研究方向 | Astronomy & Astrophysics |
来源机构 | University of California, Berkeley ; University of Oxford ; E17 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/152540 |
作者单位 | (1)Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands;(2)Univ Lyon 1, CRAL, Observ Lyon, F-69230 St Genis Laval, France;(3)ENS Lyon, CNRS, UMR 5574, Lyon, France;(4)Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA;(5)Univ Oxford, Oxford, England;(6)European Space Technol Ctr, NL-2200 AG Noordwijk, Netherlands;(7)European So Observ, Space Telescope European Coordinating Facil, D-85748 Garching, Germany;(8)Univ Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands;(9)Univ Hertfordshire, Ctr Astrophys Res, Sci & Technol Res Inst, Hatfield AL10 9AB, Herts, England |
推荐引用方式 GB/T 7714 | McDermid, Richard M.,Emsellem, Eric,Shapiro, Kristen L.,et al. The SAURON project - VIII. OASIS/CFHT integral-field spectroscopy of elliptical and lenticular galaxy centres[J]. University of California, Berkeley, University of Oxford, E17,2006,373(3):906-958. |
APA | McDermid, Richard M..,Emsellem, Eric.,Shapiro, Kristen L..,Bacon, Roland.,Bureau, Martin.,...&Sarzi, Marc.(2006).The SAURON project - VIII. OASIS/CFHT integral-field spectroscopy of elliptical and lenticular galaxy centres.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,373(3),906-958. |
MLA | McDermid, Richard M.,et al."The SAURON project - VIII. OASIS/CFHT integral-field spectroscopy of elliptical and lenticular galaxy centres".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 373.3(2006):906-958. |
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