The central regions of early-type galaxies

Andrés Jordán

doi:10.1007/978-90-481-3400-7_18

The central regions of early-type galaxies

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The ACS Virgo and Fornax cluster surveys present homogeneous HST/ACS observations of 143 early-type galaxies and their globular cluster systems in the Virgo and Fornax clusters. I briefly describe these surveys and present some of their recent results on the properties of the central regions of galaxies. In particular, we have shown that on nuclear scales, galaxies are found to exhibit a gradual progression from a light “deficit” (cores) to a light “excess” (stellar nuclei), while on larger scales the brightness profiles of galaxies are accurately described by Sérsic models. Our observations suggest that a generic by-product of galaxy formation might be the creation of a central massive object — either a supermassive black hole or a compact stellar nucleus — that contains a mean fraction ∼0.2% of the total galactic mass.

Original language	English
Title of host publication	Astrophysics and Space Science Proceedings
Editors	F. Duccio Macchetto
Publisher	Springer Science and Business Media B.V.
Pages	95-98
Number of pages	4
ISBN (Electronic)	9789048134007
ISBN (Print)	9780387727677, 9780387876207, 9781402055720, 9781402069321, 9781402088674, 9781402091896, 9781441981608, 9781441983688, 9783540758259, 9783642033230, 9783642103216, 9783642103513, 9783642113406, 9783642172502, 9789048133994, 9789048133994, 9789048134984
DOIs	https://doi.org/10.1007/978-90-481-3400-7_18
State	Published - 2010
Externally published	Yes
Event	41st Symposium of the European Space Agency : The Impact of HST on European Astronomy, 2007 - Noordwijk, Netherlands Duration: 29 May 2007 → 1 Jun 2007

Publication series

Name	Astrophysics and Space Science Proceedings
Volume	0
ISSN (Print)	1570-6591
ISSN (Electronic)	1570-6605

Conference

Conference	41st Symposium of the European Space Agency : The Impact of HST on European Astronomy, 2007
Country/Territory	Netherlands
City	Noordwijk
Period	29/05/07 → 1/06/07

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10.1007/978-90-481-3400-7_18

Cite this

@inproceedings{8ef5d99737844fdb8f7de62916c79093,

title = "The central regions of early-type galaxies",

abstract = "The ACS Virgo and Fornax cluster surveys present homogeneous HST/ACS observations of 143 early-type galaxies and their globular cluster systems in the Virgo and Fornax clusters. I briefly describe these surveys and present some of their recent results on the properties of the central regions of galaxies. In particular, we have shown that on nuclear scales, galaxies are found to exhibit a gradual progression from a light “deficit” (cores) to a light “excess” (stellar nuclei), while on larger scales the brightness profiles of galaxies are accurately described by S{\'e}rsic models. Our observations suggest that a generic by-product of galaxy formation might be the creation of a central massive object — either a supermassive black hole or a compact stellar nucleus — that contains a mean fraction ∼0.2% of the total galactic mass.",

author = "Andr{\'e}s Jord{\'a}n",

note = "Publisher Copyright: {\textcopyright} Springer Science+Business Media B.V. 2010.; 41st Symposium of the European Space Agency : The Impact of HST on European Astronomy, 2007 ; Conference date: 29-05-2007 Through 01-06-2007",

year = "2010",

doi = "10.1007/978-90-481-3400-7_18",

language = "English",

isbn = "9780387727677",

series = "Astrophysics and Space Science Proceedings",

publisher = "Springer Science and Business Media B.V.",

pages = "95--98",

editor = "Macchetto, {F. Duccio}",

booktitle = "Astrophysics and Space Science Proceedings",

}

Jordán, A 2010, The central regions of early-type galaxies. in FD Macchetto (ed.), Astrophysics and Space Science Proceedings. Astrophysics and Space Science Proceedings, vol. 0, Springer Science and Business Media B.V., pp. 95-98, 41st Symposium of the European Space Agency : The Impact of HST on European Astronomy, 2007, Noordwijk, Netherlands, 29/05/07. https://doi.org/10.1007/978-90-481-3400-7_18

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N2 - The ACS Virgo and Fornax cluster surveys present homogeneous HST/ACS observations of 143 early-type galaxies and their globular cluster systems in the Virgo and Fornax clusters. I briefly describe these surveys and present some of their recent results on the properties of the central regions of galaxies. In particular, we have shown that on nuclear scales, galaxies are found to exhibit a gradual progression from a light “deficit” (cores) to a light “excess” (stellar nuclei), while on larger scales the brightness profiles of galaxies are accurately described by Sérsic models. Our observations suggest that a generic by-product of galaxy formation might be the creation of a central massive object — either a supermassive black hole or a compact stellar nucleus — that contains a mean fraction ∼0.2% of the total galactic mass.

AB - The ACS Virgo and Fornax cluster surveys present homogeneous HST/ACS observations of 143 early-type galaxies and their globular cluster systems in the Virgo and Fornax clusters. I briefly describe these surveys and present some of their recent results on the properties of the central regions of galaxies. In particular, we have shown that on nuclear scales, galaxies are found to exhibit a gradual progression from a light “deficit” (cores) to a light “excess” (stellar nuclei), while on larger scales the brightness profiles of galaxies are accurately described by Sérsic models. Our observations suggest that a generic by-product of galaxy formation might be the creation of a central massive object — either a supermassive black hole or a compact stellar nucleus — that contains a mean fraction ∼0.2% of the total galactic mass.

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Y2 - 29 May 2007 through 1 June 2007

ER -

The central regions of early-type galaxies

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