The nature of Galactic bulges from SAURON absorption line strength maps

Reynier F. Peletier; Jesús Falcón-Barroso; Katia Ganda; Roland Bacon; Michele Cappellari; Roger L. Davies; P. Tim De Zeeuw; Eric Emsellem; Davor Krajnović; Harald Kuntschner; Richard M. McDermid; Marc Sarzi; Glenn Van De Ven

doi:10.1017/S1743921307008836

The nature of Galactic bulges from SAURON absorption line strength maps

Reynier F. Peletier^*, Jesús Falcón-Barroso, Katia Ganda, Roland Bacon, Michele Cappellari, Roger L. Davies, P. Tim De Zeeuw, Eric Emsellem, Davor Krajnović, Harald Kuntschner, Richard M. McDermid, Marc Sarzi, Glenn Van De Ven

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We discuss SAURON absorption line strength maps of a sample of 24 early-type spirals, mostly Sa. From the Lick indices H, Mgb and Fe 5015 we derive SSP-ages and metallicities. By comparing the scaling relations of Mg b and H and central velocity dispersion with the same relation for the edge-on sample of Falcn-Barroso et al. (2002) we derive a picture in which the central regions of Sa galaxies contain at least 2 components: one (or more) thin, disc-like component, often containing recent star formation, and another, elliptical-like component, consisting of old stars and rotating more slowly, dominating the light above the plane. If one defines a bulge to be the component responsible for the light in excess of the outer exponential disc, then many Sa-bulges are dominated by a thin, disc-like component containing recent star formation.

Original language	English
Pages (from-to)	485-488
Number of pages	4
Journal	Proceedings of the International Astronomical Union
Volume	2
Issue number	S241
DOIs	https://doi.org/10.1017/S1743921307008836
Publication status	Published - Dec 2006
Externally published	Yes

Keywords

Galaxies: bulges
Galaxies: spiral
Galaxies: stellar content

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10.1017/S1743921307008836

Cite this

Peletier, R. F., Falcón-Barroso, J., Ganda, K., Bacon, R., Cappellari, M., Davies, R. L., De Zeeuw, P. T., Emsellem, E., Krajnović, D., Kuntschner, H., McDermid, R. M., Sarzi, M., & Van De Ven, G. (2006). The nature of Galactic bulges from SAURON absorption line strength maps. Proceedings of the International Astronomical Union, 2(S241), 485-488. https://doi.org/10.1017/S1743921307008836

@article{b6d98ec622ee4c518e7a842fa9de8de8,

title = "The nature of Galactic bulges from SAURON absorption line strength maps",

abstract = "We discuss SAURON absorption line strength maps of a sample of 24 early-type spirals, mostly Sa. From the Lick indices H, Mgb and Fe 5015 we derive SSP-ages and metallicities. By comparing the scaling relations of Mg b and H and central velocity dispersion with the same relation for the edge-on sample of Falcn-Barroso et al. (2002) we derive a picture in which the central regions of Sa galaxies contain at least 2 components: one (or more) thin, disc-like component, often containing recent star formation, and another, elliptical-like component, consisting of old stars and rotating more slowly, dominating the light above the plane. If one defines a bulge to be the component responsible for the light in excess of the outer exponential disc, then many Sa-bulges are dominated by a thin, disc-like component containing recent star formation.",

keywords = "Galaxies: bulges, Galaxies: spiral, Galaxies: stellar content",

author = "Peletier, {Reynier F.} and Jes{\'u}s Falc{\'o}n-Barroso and Katia Ganda and Roland Bacon and Michele Cappellari and Davies, {Roger L.} and {De Zeeuw}, {P. Tim} and Eric Emsellem and Davor Krajnovi{\'c} and Harald Kuntschner and McDermid, {Richard M.} and Marc Sarzi and {Van De Ven}, Glenn",

year = "2006",

month = dec,

doi = "10.1017/S1743921307008836",

language = "English",

volume = "2",

pages = "485--488",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press (CUP)",

number = "S241",

}

Peletier, RF, Falcón-Barroso, J, Ganda, K, Bacon, R, Cappellari, M, Davies, RL, De Zeeuw, PT, Emsellem, E, Krajnović, D, Kuntschner, H, McDermid, RM, Sarzi, M & Van De Ven, G 2006, 'The nature of Galactic bulges from SAURON absorption line strength maps', Proceedings of the International Astronomical Union, vol. 2, no. S241, pp. 485-488. https://doi.org/10.1017/S1743921307008836

TY - JOUR

T1 - The nature of Galactic bulges from SAURON absorption line strength maps

AU - Peletier, Reynier F.

AU - Falcón-Barroso, Jesús

AU - Ganda, Katia

AU - Bacon, Roland

AU - Cappellari, Michele

AU - Davies, Roger L.

AU - De Zeeuw, P. Tim

AU - Emsellem, Eric

AU - Krajnović, Davor

AU - Kuntschner, Harald

AU - McDermid, Richard M.

AU - Sarzi, Marc

AU - Van De Ven, Glenn

PY - 2006/12

Y1 - 2006/12

N2 - We discuss SAURON absorption line strength maps of a sample of 24 early-type spirals, mostly Sa. From the Lick indices H, Mgb and Fe 5015 we derive SSP-ages and metallicities. By comparing the scaling relations of Mg b and H and central velocity dispersion with the same relation for the edge-on sample of Falcn-Barroso et al. (2002) we derive a picture in which the central regions of Sa galaxies contain at least 2 components: one (or more) thin, disc-like component, often containing recent star formation, and another, elliptical-like component, consisting of old stars and rotating more slowly, dominating the light above the plane. If one defines a bulge to be the component responsible for the light in excess of the outer exponential disc, then many Sa-bulges are dominated by a thin, disc-like component containing recent star formation.

AB - We discuss SAURON absorption line strength maps of a sample of 24 early-type spirals, mostly Sa. From the Lick indices H, Mgb and Fe 5015 we derive SSP-ages and metallicities. By comparing the scaling relations of Mg b and H and central velocity dispersion with the same relation for the edge-on sample of Falcn-Barroso et al. (2002) we derive a picture in which the central regions of Sa galaxies contain at least 2 components: one (or more) thin, disc-like component, often containing recent star formation, and another, elliptical-like component, consisting of old stars and rotating more slowly, dominating the light above the plane. If one defines a bulge to be the component responsible for the light in excess of the outer exponential disc, then many Sa-bulges are dominated by a thin, disc-like component containing recent star formation.

KW - Galaxies: bulges

KW - Galaxies: spiral

KW - Galaxies: stellar content

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U2 - 10.1017/S1743921307008836

DO - 10.1017/S1743921307008836

M3 - Article

AN - SCOPUS:37149035486

SN - 1743-9213

VL - 2

SP - 485

EP - 488

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S241

ER -

The nature of Galactic bulges from SAURON absorption line strength maps

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Keywords

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