The Kinematics in the Cores of Low Surface Brightness Galaxies

R. A. Swaters; M. A. W. Verheijen; M. A. Bershady; D. R. Andersen

The Kinematics in the Cores of Low Surface Brightness Galaxies

R. A. Swaters, M. A. W. Verheijen, M. A. Bershady, D. R. Andersen

Astronomy

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

Abstract

Systematic effects on HI and Hα long-slit observations make a measurement of the inner slope of the dark matter density distribution difficult to determine. Halos with constant density cores and ones with r-1 profiles both appear consistent with the data, although constant density cores generally provide better fits. High-resolution, two-dimensional velocity fields remove most of the systematic effects, yet as a result of noncircular and random motions the inner slopes still cannot be accurately measured. Halo concentration parameters provide a more useful test of cosmological models because they are more tightly constrained by observations. The concentration parameters for LSB galaxies appear consistent with, but on the low end of the distribution predicted by CDM.

Original language	English
Title of host publication	Dark Matter in Galaxies
Editors	S. D. Ryder, D. J. Pisano, M. A. Walker, K. C. Freeman
Publisher	Astronomical Society of the Pacific
Pages	77
Volume	220
ISBN (Print)	978-1583811672
Publication status	Published - 1-Jul-2004
Event	220th Symposium of the International Astronomical Union Held During the Iau General Assembly XXV, S - Sidney, Australia Duration: 21-Jul-2003 → 25-Jul-2003

Conference

Conference	220th Symposium of the International Astronomical Union Held During the Iau General Assembly XXV, S
Country/Territory	Australia
City	Sidney
Period	21/07/2003 → 25/07/2003

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@inproceedings{6beeb9c392474d5f9f8b5922b562b497,

title = "The Kinematics in the Cores of Low Surface Brightness Galaxies",

abstract = "Systematic effects on HI and Hα long-slit observations make a measurement of the inner slope of the dark matter density distribution difficult to determine. Halos with constant density cores and ones with r-1 profiles both appear consistent with the data, although constant density cores generally provide better fits. High-resolution, two-dimensional velocity fields remove most of the systematic effects, yet as a result of noncircular and random motions the inner slopes still cannot be accurately measured. Halo concentration parameters provide a more useful test of cosmological models because they are more tightly constrained by observations. The concentration parameters for LSB galaxies appear consistent with, but on the low end of the distribution predicted by CDM.",

author = "Swaters, {R. A.} and Verheijen, {M. A. W.} and Bershady, {M. A.} and Andersen, {D. R.}",

year = "2004",

month = jul,

day = "1",

language = "English",

isbn = "978-1583811672",

volume = "220",

pages = "77",

editor = "Ryder, {S. D. } and { Pisano}, {D. J.} and Walker, {M. A. } and { Freeman}, {K. C.}",

booktitle = "Dark Matter in Galaxies",

publisher = "Astronomical Society of the Pacific",

note = "220th Symposium of the International Astronomical Union Held During the Iau General Assembly XXV, S ; Conference date: 21-07-2003 Through 25-07-2003",

}

Swaters, RA, Verheijen, MAW, Bershady, MA & Andersen, DR 2004, The Kinematics in the Cores of Low Surface Brightness Galaxies. in SD Ryder, DJ Pisano, MA Walker & KC Freeman (eds), Dark Matter in Galaxies. vol. 220, Astronomical Society of the Pacific, pp. 77, 220th Symposium of the International Astronomical Union Held During the Iau General Assembly XXV, S, Sidney, Australia, 21/07/2003. <http://adsabs.harvard.edu/abs/2004IAUS..220...77S>

The Kinematics in the Cores of Low Surface Brightness Galaxies. / Swaters, R. A.; Verheijen, M. A. W.; Bershady, M. A. et al.
Dark Matter in Galaxies. ed. / S. D. Ryder; D. J. Pisano; M. A. Walker; K. C. Freeman. Vol. 220 Astronomical Society of the Pacific, 2004. p. 77.

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

TY - GEN

T1 - The Kinematics in the Cores of Low Surface Brightness Galaxies

AU - Swaters, R. A.

AU - Verheijen, M. A. W.

AU - Bershady, M. A.

AU - Andersen, D. R.

PY - 2004/7/1

Y1 - 2004/7/1

N2 - Systematic effects on HI and Hα long-slit observations make a measurement of the inner slope of the dark matter density distribution difficult to determine. Halos with constant density cores and ones with r-1 profiles both appear consistent with the data, although constant density cores generally provide better fits. High-resolution, two-dimensional velocity fields remove most of the systematic effects, yet as a result of noncircular and random motions the inner slopes still cannot be accurately measured. Halo concentration parameters provide a more useful test of cosmological models because they are more tightly constrained by observations. The concentration parameters for LSB galaxies appear consistent with, but on the low end of the distribution predicted by CDM.

AB - Systematic effects on HI and Hα long-slit observations make a measurement of the inner slope of the dark matter density distribution difficult to determine. Halos with constant density cores and ones with r-1 profiles both appear consistent with the data, although constant density cores generally provide better fits. High-resolution, two-dimensional velocity fields remove most of the systematic effects, yet as a result of noncircular and random motions the inner slopes still cannot be accurately measured. Halo concentration parameters provide a more useful test of cosmological models because they are more tightly constrained by observations. The concentration parameters for LSB galaxies appear consistent with, but on the low end of the distribution predicted by CDM.

M3 - Conference contribution

SN - 978-1583811672

VL - 220

SP - 77

BT - Dark Matter in Galaxies

A2 - Ryder, S. D.

A2 - Pisano, D. J.

A2 - Walker, M. A.

A2 - Freeman, K. C.

PB - Astronomical Society of the Pacific

T2 - 220th Symposium of the International Astronomical Union Held During the Iau General Assembly XXV, S

Y2 - 21 July 2003 through 25 July 2003

ER -

The Kinematics in the Cores of Low Surface Brightness Galaxies

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