Skip to main content
We gratefully acknowledge support from the Simons Foundation, member institutions, and all contributors. Donate
arXiv logo
Cornell University Logo

Astrophysics

arXiv:astro-ph/9610249 (astro-ph)
[Submitted on 30 Oct 1996]

Title:The Flattened Dark Matter Halo of NGC 4244

Authors:Rob P. Olling (University of Southampton)
View PDF
Abstract: In a previous paper (Olling 1995, astro-ph/9505002) a method was developed to determine the shapes of dark matter halos of spiral galaxies from an accurate determination of the rotation curve, the flaring of the gas layer and the velocity dispersion in the HI. Here I report the results for the almost edge-on Scd galaxy NGC 4244 (Olling 1996a,astro-ph/9605110; 1996b, astro-ph/9605111).
The observed flaring of the HI beyond the optical disk puts significant constraints on the shape of the dark matter halo, which are almost independent of the stellar mass-to-light ratio. NGC 4244's dark matter halo is found to be highly flattened with a shortest-to-longest axis ratio of 0.2 (-0.1,+0.3). If the dark matter is disk-like, the data presented in this paper imply that the vertical velocity dispersion of the dark matter must be 10% - 30% larger than the measured tangential dispersion in the HI.
Comments: 8 pages LaTeX, including 3 figures. Uses this http URL and this http URL. To appear in "Dark and Visible Matter in Galaxies and Cosmological Implications," eds. M. Persic and P. Salucci, A.S.P. Conference Series. 1997
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/9610249
  (or arXiv:astro-ph/9610249v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/9610249

Submission history

From: Rob P. Olling [view email]
[v1] Wed, 30 Oct 1996 18:58:04 UTC (47 KB)
Full-text links:

Access Paper:

view license
Current browse context:
astro-ph
< prev   |   next >
new | recent | 1996-10

References & Citations

export BibTeX citation

Bookmark

BibSonomy logo Reddit logo

Bibliographic and Citation Tools

Bibliographic Explorer (What is the Explorer?)
Connected Papers (What is Connected Papers?)
Litmaps (What is Litmaps?)
scite Smart Citations (What are Smart Citations?)

Code, Data and Media Associated with this Article

alphaXiv (What is alphaXiv?)
CatalyzeX Code Finder for Papers (What is CatalyzeX?)
DagsHub (What is DagsHub?)
Gotit.pub (What is GotitPub?)
Hugging Face (What is Huggingface?)
Papers with Code (What is Papers with Code?)
ScienceCast (What is ScienceCast?)

Demos

Replicate (What is Replicate?)
Hugging Face Spaces (What is Spaces?)
TXYZ.AI (What is TXYZ.AI?)

Recommenders and Search Tools

Influence Flower (What are Influence Flowers?)
CORE Recommender (What is CORE?)
IArxiv Recommender (What is IArxiv?)

arXivLabs: experimental projects with community collaborators

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.

Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)