Skip to main content Accessibility help
×
Home

Structure of Dark Halos: Model-independent Information from HI Rotation Curves

Published online by Cambridge University Press:  05 March 2013

Penny D. Sackett
Affiliation:
Kapteyn Astronomical Institute, 9700 AV Groningen, The Netherlands; psackett@astro.rug.nl
Corresponding
E-mail address:
Rights & Permissions[Opens in a new window]

Abstract

Although the approximately flat rotation curves of gas in the outskirts of spirals are generally taken as strong evidence for spherical, isothermal dark matter halos, this conclusion is often incorrect and always model-dependent. A re-examination of the old and (nearly) model-independent inversion technique for determining the surface mass density of galaxies from their kinematics is presented. The method is shown to be relatively insensitive to noise in the kinematics. Due to incomplete kinematical knowledge at large radius, however, the surface mass density is reliable only in the inner half of the galaxy, a result that also applies to traditional rotation curve fitting techniques.

Type
Research Article
Copyright
Copyright © Astronomical Society of Australia 1997

References

Begeman, K. G. 1987, PhD thesis, University of Groningen Google Scholar
Binney, J., & Tremaine, S. 1987, Galactic Dynamics (Princeton Univ. Press), 74 Google Scholar
Bosma, A. 1981, AJ, 86, 1825 CrossRefGoogle Scholar
Brandt, J. C. 1960, ApJ, 131, 293 CrossRefGoogle Scholar
Burbidge, E. M., Burbidge, G. R., & Prendergast, K. H. 1959, ApJ, 130, 739 CrossRefGoogle Scholar
Cuddeford, P. 1993, MNRAS, 262, 1076 CrossRefGoogle Scholar
Nordsieck, K. H. 1973, ApJ, 184, 719 CrossRefGoogle Scholar
Sackett, P. D. 1996, Distribution of Dark Matter in Galaxies, in Astrophysical Applications of Gravitational Lensing, Proe. IAU 173, ed. C. Kochanek & J. Hewitt (Dordrecht: Kluwer), 165 Google Scholar
Schneider, S. E. 1985, ApJ, 288, 33L CrossRefGoogle Scholar
Toomre, A. 1963, ApJ, 138, 385 CrossRefGoogle Scholar
van Albada, T. S., & Sancisi, R. 1986, Phil. Trans. Roy. Soc. London, A320, 447 CrossRefGoogle Scholar
Zaritsky, D., & White, S. D. M. 1994, ApJ, 435, 599 CrossRefGoogle Scholar

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 83 *
View data table for this chart

* Views captured on Cambridge Core between September 2016 - 15th January 2021. This data will be updated every 24 hours.

Access
Hostname: page-component-77fc7d77f9-cjctk Total loading time: 0.285 Render date: 2021-01-15T21:46:27.839Z Query parameters: { "hasAccess": "1", "openAccess": "0", "isLogged": "0", "lang": "en" } Feature Flags last update: Fri Jan 15 2021 20:51:08 GMT+0000 (Coordinated Universal Time) Feature Flags: { "metrics": true, "metricsAbstractViews": false, "peerReview": true, "crossMark": true, "comments": true, "relatedCommentaries": true, "subject": true, "clr": true, "languageSwitch": true, "figures": false, "newCiteModal": false, "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true }

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Structure of Dark Halos: Model-independent Information from HI Rotation Curves
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Structure of Dark Halos: Model-independent Information from HI Rotation Curves
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Structure of Dark Halos: Model-independent Information from HI Rotation Curves
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *