MOND - dark matter - modified newtonain dynamics
Welcome to the MOND pages
This is my personal forum for discussing the MOdified
Newtonian Dynamics (MOND) proposed by
Moti Milgrom
as a solution to the missing mass problem.
- Scientific Literature
- Extensive list of the
literature concerning MOND, complete with links to the actual papers
when available, and the occassional commentary.
- The Basic Issue, in brief.
- The Dark Matter Tree (small |
large)
showing the empirical roots of the mass discrepancy problem and the
many proposed branches of solutions.
- Why consider MOND?
- Frequently Asked Questions
- MOND in the news
- Local Dwarfs in
Science
Daily 4/7/2008
- BBC report
from the UK National Astronomy Meeting 4/5/2008
- RAS press
release 4/4/2008
- Radio chat
on WCPN 9/10/2007.
- Dark
Matter is Dead in the BBC's
Sky at Night
9/2007
- Seeing Through Dark
Matter in
Science
8/2007 (follow the link from
this link
to Science on-line).
- Battlefield Galactica in Sky
& Telescope 4/2007
- Inaugural
Letter from a Contrarian,
first appearing in
Cosmic Controversy 12/2006
- Article in
Ciel
& Espcace 12/2006 (in French)
- Physics Today
Search
& Discovery 11/2006
- Further material, including older
publications in the popular press and other MOND related sites.
- Material written at the Popular Level
- Philosophical aspects
of the debate over Dark Matter and MOND
- Sure to provide fodder for sociologists and historians of science for
decades to come.
- A popular perspective [HTML] |
[PDF]
- written for Astronomy Now
(January 2002)
- There have been a number of good, popular level reviews lately -
- see the
appropriate section of the literature page.
- Milgrom's article for
Scientific American (August 2002)
- Slides from talks related to MOND
- Colloquium given at
DTM, April 2008
- Colloquium given at
TRIUMF, February 2008
- Physics department colloquium
given at George Mason University, April 2007.
- Review talk given at the
Alternative Gravities and Dark Matter Workshop, April 2006.
- Physics department colloquium
given at the University of Rochester, April 2006.
- Review talk given at the interdisciplinary
conference Dark Matter in the Universe, October 2005.
- Material related to the Dynamical Evidence
- Comparison of MOND and Dark Matter
- Includes a table itemizing various observational tests and how
each fares.
- Example of a MOND fit to a rotation curve.
- Comparison of MOND and CDM fits
to the rotation curve of NGC 1560.
- Lots and lots of fits.
- These are plotted log(V)-log(R) for data with velocity errors < 5%.
- Points with error bars are the data; red lines are the fits;
light blue lines are the Newtoinian stars+gas.
- Predictions made by Milgrom in
1983
which were subsequently confirmed
(in 1998)
- A MOND fit to the rotation curve of a low
surface brightness galaxy.
- Mass-to-Light Ratios and
Stellar Populations
- Remarkably reasonable.
- Roster of galaxies which have been used
to test MOND:
- 84-0-11
- MOND performs well in the Milky Way,
providing detailed information about the surface density profile.
- N-body computations
- Modelers beware: implementing MOND is not a one line change to
standard particle-pushing codes.
Chris Mihos
explains why. (The inertial modification is inherently nonlocal.)
[See also a more sober write-up.]
- Other numerical approaches are necessary. For example,
Brada's thesis;
Ciotti, Londrillo, & Nipoti;
Tiret & Combes.
- Material related to the Cosmic Microwave Background
- 2006:
The Third Peak in TeVeS (April 2006).
- 2006:
WMAP finally reports new data (March 2006).
- 2005:
BOOMERanG reports new data from its 2003
Antarctic flight (Aug. 2005).
- The WMAP second-year data are a year and half late and counting...
- 2004: The WMAP second-year data are late.
- 2003: No-CDM & WMAP (Feb. 2003).
- WMAP 1st:2nd peak amplitude ratio bang on the No-CDM prediction.
- WMAP polarization detection confirms the prediction of early reionization.
- The critical third peak remains ill-constrained.
- 2001:
How the No-CDM prediction fares
with DASI and updated (in May, 2001) BOOMERanG CMB data.
- 2000:
No-CDM prediction realized in
BOOMERanG microwave background data.
- Associated
press release, Sept. 27, 2000.
- 1999:
No-CDM model
provides best-guess prediction for CMB in a MOND universe.
- Strictly speaking, only the shape of the power spectrum is predicted
in the absence of CDM. This represents MOND only under the ansatz
that a MOND version of GR is identical to standard GR in the early
universe. More properly, this is a test for the existence of non-baryonic
dark matter, and says nothing directly about MOND.
- Material related to the
Bullet Cluster
- Comments on the Bullet Cluster
claim to require dark matter.
- The full text of
my reply to press inquiries (from which published quotes were extracted).
- Paper by Angus
et al. fitting the new data.
- Preprint examining the
collision velocity of the clusters. This is more naturally understood in
terms of MOND than CDM. [Published in MNRAS (2007) 383, 417]
- Milgrom's comments on the Bullet Cluster
- An unsolicited, independent perspective
- Related talks by Angus:
PPT |
text
- The collision velocity of
the bullet cluster in CDM and MOND.
- A counter-example to the bullet cluster -
Abell 520.
- The dark matter ring in
cluster 0024+17.
- Material related to Tidal Dwarfs
- Can tidal dwarfs falsify dark matter?
MOND - dark matter - modified newtonain dynamics
MOND - dark matter - modified newtonain dynamics
MOND - dark matter - modified newtonain dynamics
MOND - dark matter - modified newtonain dynamics
Link to further material, including other
MOND related sites.
MOND - dark matter - modified newtonain dynamics
MOND - dark matter - modified newtonain dynamics
MOND - dark matter - modified newtonain dynamics
MOND - dark matter - modified newtonain dynamics
MOND - dark matter - modified newtonain dynamics
MOND - dark matter - modified newtonain dynamics
MOND - dark matter - Modified Newtonain Dynamics
MOND - dark matter - modified newtonain dynamics
On-line since 1997
