[Fe/H] extrapolation

[tedvh]

The code is allowing [Fe/H] extrapolation somewhere. This may be a bug or it may be a feature. The most metal-rich of our models has an upper [Fe/H] limit of +0.5, but every now and then there are excursions to +4 or more.

At present, this is very low priority because a) it happens rarely, and b) it may only be happening when running single WDs, the parameters of which are very insensitive to [Fe/H].

[argiopetech]

And this is why we need test cases. We may want to consider putting a
dampening factor or even a hard limit on the extrapolation code (with
appropriate warnings) if extrapolations well outside the bounds of the
models are plausible but not desired.

---

Elliot Robinson
Email: elliot.robinson@argiopetech.com
Phone: (321) 252-9660

On Tue, Jun 25, 2013 at 10:23 AM, tedvh notifications@github.com wrote:

The code is allowing [Fe/H] extrapolation somewhere. This may be a bug or
it may be a feature. The most metal-rich of our models has an upper [Fe/H]
limit of +0.5, but every now and then there are excursions to +4 or more.

At present, this is very low priority because a) it happens rarely, and b)
it may only be happening when running single WDs, the parameters of which
are very insensitive to [Fe/H].

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/21
.

[tedvh]

Two good points. We'd have to ask the Bayesians about this, but my guess
is that we'll want hard limits.

On 6/25/13 11:30 AM, Elliot Robinson wrote:

And this is why we need test cases. We may want to consider putting a
dampening factor or even a hard limit on the extrapolation code (with
appropriate warnings) if extrapolations well outside the bounds of the
models are plausible but not desired.

---

Elliot Robinson
Email: elliot.robinson@argiopetech.com
Phone: (321) 252-9660

On Tue, Jun 25, 2013 at 10:23 AM, tedvh notifications@github.com wrote:

The code is allowing [Fe/H] extrapolation somewhere. This may be a bug or
it may be a feature. The most metal-rich of our models has an upper [Fe/H]
limit of +0.5, but every now and then there are excursions to +4 or more.

At present, this is very low priority because a) it happens rarely, and b)
it may only be happening when running single WDs, the parameters of which
are very insensitive to [Fe/H].

—
Reply to this email directly or view it on
GitHubhttps://github.com//issues/21
.

—
Reply to this email directly or view it on GitHub
#21 (comment).

Ted von Hippel

Department of Physical Sciences
Embry-Riddle Aeronautical University
600 S. Clyde Morris Boulevard
Daytona Beach, FL 32114-3900
386-226-7751