Dark-matter content of early-type galaxies with planetary nebulae

N. R. Napolitano; A. J. Romanowsky; L. Coccato; M. Capaccioli; N. G. Douglas; E. Noordermeer; M. R. Merrifield; K. Kuijken; M. Arnaboldi; O. Gerhard; K. C. Freeman; F. De Lorenzi; P. Das

doi:10.1017/S1743921307014111

Dark-matter content of early-type galaxies with planetary nebulae

N. R. Napolitano^*, A. J. Romanowsky, L. Coccato, M. Capaccioli, N. G. Douglas, E. Noordermeer, M. R. Merrifield, K. Kuijken, M. Arnaboldi, O. Gerhard, K. C. Freeman, F. De Lorenzi, P. Das

^*Corresponding author for this work

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

Abstract

We examine the dark matter properties of nearby early-type galaxies using planetary nebulae (PNe) as mass probes. We have designed a specialised instrument, the Planetary Nebula Spectrograph (PN.S) operating at the William Herschel telescope, with the purpose of measuring PN velocities with best efficiency. The primary scientific objective of this custom-built instrument is the study of the PN kinematics in 12 ordinary round galaxies. Preliminary results showing a dearth of dark matter in ordinary galaxies (Romanowsky et al. 2003) are now confirmed by the first complete PN.S datasets. On the other hand early-type galaxies with a regular dark matter content are starting to be observed among the brighter PN.S target sample, thus confirming a correlation between the global dark-to-luminous mass virial ratio (fDM = MDM M _*) and the galaxy luminosity and mass.

Original language	English
Pages (from-to)	289-294
Number of pages	6
Journal	Proceedings of the International Astronomical Union
Volume	3
Issue number	S244
DOIs	https://doi.org/10.1017/S1743921307014111
Publication status	Published - Jun 2007

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Napolitano, N. R., Romanowsky, A. J., Coccato, L., Capaccioli, M., Douglas, N. G., Noordermeer, E., Merrifield, M. R., Kuijken, K., Arnaboldi, M., Gerhard, O., Freeman, K. C., De Lorenzi, F., & Das, P. (2007). Dark-matter content of early-type galaxies with planetary nebulae. Proceedings of the International Astronomical Union, 3(S244), 289-294. https://doi.org/10.1017/S1743921307014111

@article{68a70686595040818a817c5d2593cd61,

title = "Dark-matter content of early-type galaxies with planetary nebulae",

abstract = "We examine the dark matter properties of nearby early-type galaxies using planetary nebulae (PNe) as mass probes. We have designed a specialised instrument, the Planetary Nebula Spectrograph (PN.S) operating at the William Herschel telescope, with the purpose of measuring PN velocities with best efficiency. The primary scientific objective of this custom-built instrument is the study of the PN kinematics in 12 ordinary round galaxies. Preliminary results showing a dearth of dark matter in ordinary galaxies (Romanowsky et al. 2003) are now confirmed by the first complete PN.S datasets. On the other hand early-type galaxies with a regular dark matter content are starting to be observed among the brighter PN.S target sample, thus confirming a correlation between the global dark-to-luminous mass virial ratio (fDM = MDM M *) and the galaxy luminosity and mass.",

keywords = "Dark matter, Evolution, Galaxies: haloes, Kinematics and dynamics",

author = "Napolitano, {N. R.} and Romanowsky, {A. J.} and L. Coccato and M. Capaccioli and Douglas, {N. G.} and E. Noordermeer and Merrifield, {M. R.} and K. Kuijken and M. Arnaboldi and O. Gerhard and Freeman, {K. C.} and {De Lorenzi}, F. and P. Das",

year = "2007",

month = jun,

doi = "10.1017/S1743921307014111",

language = "English",

volume = "3",

pages = "289--294",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

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Napolitano, NR, Romanowsky, AJ, Coccato, L, Capaccioli, M, Douglas, NG, Noordermeer, E, Merrifield, MR, Kuijken, K, Arnaboldi, M, Gerhard, O, Freeman, KC, De Lorenzi, F & Das, P 2007, 'Dark-matter content of early-type galaxies with planetary nebulae', Proceedings of the International Astronomical Union, vol. 3, no. S244, pp. 289-294. https://doi.org/10.1017/S1743921307014111

TY - JOUR

T1 - Dark-matter content of early-type galaxies with planetary nebulae

AU - Napolitano, N. R.

AU - Romanowsky, A. J.

AU - Coccato, L.

AU - Capaccioli, M.

AU - Douglas, N. G.

AU - Noordermeer, E.

AU - Merrifield, M. R.

AU - Kuijken, K.

AU - Arnaboldi, M.

AU - Gerhard, O.

AU - Freeman, K. C.

AU - De Lorenzi, F.

AU - Das, P.

PY - 2007/6

Y1 - 2007/6

N2 - We examine the dark matter properties of nearby early-type galaxies using planetary nebulae (PNe) as mass probes. We have designed a specialised instrument, the Planetary Nebula Spectrograph (PN.S) operating at the William Herschel telescope, with the purpose of measuring PN velocities with best efficiency. The primary scientific objective of this custom-built instrument is the study of the PN kinematics in 12 ordinary round galaxies. Preliminary results showing a dearth of dark matter in ordinary galaxies (Romanowsky et al. 2003) are now confirmed by the first complete PN.S datasets. On the other hand early-type galaxies with a regular dark matter content are starting to be observed among the brighter PN.S target sample, thus confirming a correlation between the global dark-to-luminous mass virial ratio (fDM = MDM M *) and the galaxy luminosity and mass.

AB - We examine the dark matter properties of nearby early-type galaxies using planetary nebulae (PNe) as mass probes. We have designed a specialised instrument, the Planetary Nebula Spectrograph (PN.S) operating at the William Herschel telescope, with the purpose of measuring PN velocities with best efficiency. The primary scientific objective of this custom-built instrument is the study of the PN kinematics in 12 ordinary round galaxies. Preliminary results showing a dearth of dark matter in ordinary galaxies (Romanowsky et al. 2003) are now confirmed by the first complete PN.S datasets. On the other hand early-type galaxies with a regular dark matter content are starting to be observed among the brighter PN.S target sample, thus confirming a correlation between the global dark-to-luminous mass virial ratio (fDM = MDM M *) and the galaxy luminosity and mass.

KW - Dark matter

KW - Evolution

KW - Galaxies: haloes

KW - Kinematics and dynamics

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DO - 10.1017/S1743921307014111

M3 - Article

AN - SCOPUS:39449109550

SN - 1743-9213

VL - 3

SP - 289

EP - 294

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S244

ER -

Dark-matter content of early-type galaxies with planetary nebulae

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