On Oct 5, 1:05*pm, "Robert L. Oldershaw"
wrote:
On Oct 5, 2:16*am, "Robert L. Oldershaw"
wrote:

"PSR J1903+0327 : A Unique Milli-Second Pulsar with a Main Sequence
Companion Star"

http://arxiv.org/abs/1110.0507
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CORRECTION!!!

The above-mentioned preprint has a bad mistake in it,
which I discovered on closer study.

The authors state: "This also matches the prediction of the
companion's mass of 1.667 solar mass from pulsar timing (Freire
2011)."

The 1.667 solar mass is actually the estimated mass of the pulsar.
Not the mass of the companion.

The analysis of PSR J1903+0327 really comes from Freire et al, 2010,
which can be read at:

http://arxiv.org/abs/1011.5809 .

The dynamical mass estimate for the binary system = 2.70 +/- 0.11
solar masses, and is found on page 7 of the above linked preprint.
The closest DSR prediction is (19)(0.145 sm) = 2.755 solar mass.
However the error bars encompass 2 separate DSR predicted values at
2.610 and 2.755 solar mass.

Bottom Lines:

This is still an interesting system.
It has an unusual set of subsystems.
It has a very unusual eccentricity.
But the dynamical mass estimate falls far short of what would be
needed to test the DSR predictions.

Perhaps in the future the dynamical mass estimate for the total binary
system can be refined enough to offer more useful information.

RLO
http://www3.amherst.edu/~rloldershaw