Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379

Anne Marie Weijmans; Michele Cappellari; P. T. Zeeuw; Eric Emsellem; J. Falcon-Barroso; Harald Kuntschner; R. M. McDermid; R. C E Van Den Bosch; Glenn van de Ven

Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379

Anne Marie Weijmans, Michele Cappellari, P. T. Zeeuw, Eric Emsellem, J. Falcon-Barroso, Harald Kuntschner, R. M. McDermid, R. C E Van Den Bosch, Glenn van de Ven

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

Abstract

We describe a new technique to measure stellar kinematics and line-strengths at large radii in nearby galaxies. Using the integral-field spectrograph SAURON as a 'photon-collector', we obtain spectra out to four effective radii (R_e) in the early-type galaxy NGC 3379. By fitting orbit-based models to the extracted stellar velocity profile, we find that similar to 40% of the total mass within 5 R_e is dark. The measured absorption line-strengths reveal a radial gradient with constant slope out to 4 R_e.

Original language	English
Title of host publication	Galaxy evolution
Subtitle of host publication	emerging insights and future challenges
Editors	S Jogee, Marinova, L Hao, GA Blanc
Place of Publication	San Francisco, CA
Publisher	ASTRONOMICAL SOC PACIFIC
Pages	179-182
Number of pages	2
Volume	419
ISBN (Electronic)	9781583817193
ISBN (Print)	9781583817186
Publication status	Published - 2009
Externally published	Yes
Event	International Conference on Galaxy Evolution: Emerging Insights and Future Challenges - Austin Duration: 11 Nov 2008 → 14 Nov 2008

Publication series

Name	Astronomical Society of the Pacific Conference Series
Publisher	ASTRONOMICAL SOC PACIFIC
Volume	419

Conference

Conference	International Conference on Galaxy Evolution
City	Austin
Period	11/11/08 → 14/11/08

Keywords

SAURON PROJECT
LENTICULAR GALAXIES
MODELS
HALOS

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http://www.aspbooks.org/a/volumes/article_details/?paper_id=31010

Cite this

Weijmans, A. M., Cappellari, M., Zeeuw, P. T., Emsellem, E., Falcon-Barroso, J., Kuntschner, H., McDermid, R. M., Van Den Bosch, R. C. E., & de Ven, G. V. (2009). Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379. In S. Jogee, Marinova, L. Hao, & GA. Blanc (Eds.), Galaxy evolution: emerging insights and future challenges (Vol. 419, pp. 179-182). (Astronomical Society of the Pacific Conference Series; Vol. 419). ASTRONOMICAL SOC PACIFIC. http://www.aspbooks.org/a/volumes/article_details/?paper_id=31010

Weijmans, Anne Marie ; Cappellari, Michele ; Zeeuw, P. T. et al. / Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379. Galaxy evolution: emerging insights and future challenges. editor / S Jogee ; Marinova ; L Hao ; GA Blanc. Vol. 419 San Francisco, CA : ASTRONOMICAL SOC PACIFIC, 2009. pp. 179-182 (Astronomical Society of the Pacific Conference Series).

@inproceedings{ec242372db864531a684b6509540e2a9,

title = "Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379",

abstract = "We describe a new technique to measure stellar kinematics and line-strengths at large radii in nearby galaxies. Using the integral-field spectrograph SAURON as a 'photon-collector', we obtain spectra out to four effective radii (Re) in the early-type galaxy NGC 3379. By fitting orbit-based models to the extracted stellar velocity profile, we find that similar to 40\% of the total mass within 5 Re is dark. The measured absorption line-strengths reveal a radial gradient with constant slope out to 4 Re.",

keywords = "SAURON PROJECT, LENTICULAR GALAXIES, MODELS, HALOS",

author = "Weijmans, \{Anne Marie\} and Michele Cappellari and Zeeuw, \{P. T.\} and Eric Emsellem and J. Falcon-Barroso and Harald Kuntschner and McDermid, \{R. M.\} and \{Van Den Bosch\}, \{R. C E\} and \{de Ven\}, \{Glenn van\}",

year = "2009",

language = "English",

isbn = "9781583817186",

volume = "419",

series = "Astronomical Society of the Pacific Conference Series",

publisher = "ASTRONOMICAL SOC PACIFIC",

pages = "179--182",

editor = "S Jogee and Marinova and L Hao and GA Blanc",

booktitle = "Galaxy evolution",

note = "International Conference on Galaxy Evolution : Emerging Insights and Future Challenges ; Conference date: 11-11-2008 Through 14-11-2008",

}

Weijmans, AM, Cappellari, M, Zeeuw, PT, Emsellem, E, Falcon-Barroso, J, Kuntschner, H, McDermid, RM, Van Den Bosch, RCE & de Ven, GV 2009, Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379. in S Jogee, Marinova, L Hao & GA Blanc (eds), Galaxy evolution: emerging insights and future challenges. vol. 419, Astronomical Society of the Pacific Conference Series, vol. 419, ASTRONOMICAL SOC PACIFIC, San Francisco, CA, pp. 179-182, International Conference on Galaxy Evolution, Austin, 11/11/08. <http://www.aspbooks.org/a/volumes/article_details/?paper_id=31010>

Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379. / Weijmans, Anne Marie; Cappellari, Michele; Zeeuw, P. T. et al.
Galaxy evolution: emerging insights and future challenges. ed. / S Jogee; Marinova; L Hao; GA Blanc. Vol. 419 San Francisco, CA: ASTRONOMICAL SOC PACIFIC, 2009. p. 179-182 (Astronomical Society of the Pacific Conference Series; Vol. 419).

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

TY - GEN

T1 - Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379

AU - Weijmans, Anne Marie

AU - Cappellari, Michele

AU - Zeeuw, P. T.

AU - Emsellem, Eric

AU - Falcon-Barroso, J.

AU - Kuntschner, Harald

AU - McDermid, R. M.

AU - Van Den Bosch, R. C E

AU - de Ven, Glenn van

PY - 2009

Y1 - 2009

N2 - We describe a new technique to measure stellar kinematics and line-strengths at large radii in nearby galaxies. Using the integral-field spectrograph SAURON as a 'photon-collector', we obtain spectra out to four effective radii (Re) in the early-type galaxy NGC 3379. By fitting orbit-based models to the extracted stellar velocity profile, we find that similar to 40% of the total mass within 5 Re is dark. The measured absorption line-strengths reveal a radial gradient with constant slope out to 4 Re.

AB - We describe a new technique to measure stellar kinematics and line-strengths at large radii in nearby galaxies. Using the integral-field spectrograph SAURON as a 'photon-collector', we obtain spectra out to four effective radii (Re) in the early-type galaxy NGC 3379. By fitting orbit-based models to the extracted stellar velocity profile, we find that similar to 40% of the total mass within 5 Re is dark. The measured absorption line-strengths reveal a radial gradient with constant slope out to 4 Re.

KW - SAURON PROJECT

KW - LENTICULAR GALAXIES

KW - MODELS

KW - HALOS

M3 - Conference proceeding contribution

SN - 9781583817186

VL - 419

T3 - Astronomical Society of the Pacific Conference Series

SP - 179

EP - 182

BT - Galaxy evolution

A2 - Jogee, S

A2 - Marinova, null

A2 - Hao, L

A2 - Blanc, GA

PB - ASTRONOMICAL SOC PACIFIC

CY - San Francisco, CA

T2 - International Conference on Galaxy Evolution

Y2 - 11 November 2008 through 14 November 2008

ER -

Weijmans AM, Cappellari M, Zeeuw PT, Emsellem E, Falcon-Barroso J, Kuntschner H et al. Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379. In Jogee S, Marinova, Hao L, Blanc GA, editors, Galaxy evolution: emerging insights and future challenges. Vol. 419. San Francisco, CA: ASTRONOMICAL SOC PACIFIC. 2009. p. 179-182. (Astronomical Society of the Pacific Conference Series). Epub 2008 Nov 18.

Stellar velocity profiles and line-strengths out to four effective radii in the early-type Galaxy NGC 3379

Abstract

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Keywords

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