Re: VLP meeting logistics

[Martin Pohl <mkp@iastate.edu>]

Dear jacco,

I would be interested in the non-thermal emission aspects. Let us talk about 
it at the meeting.

Martin


On Monday 29 March 2004 06:51, Jacco Vink wrote:
> Hi Una, Martin,
>
> I have of course some interest in the Ti-44 item listed in the schedule,
> but in addition I would like to further investigate the non-thermal
> emission from the shock front, and possibly from inside the remnant as
> well. So if anybody is interested we can discuss this at the meeting.
>
> Should we give small presentations for each item?
>
> Other things that may be interesting to discuss are:
> - Ne, Mg deficiency in Cas A. Is there really a lack of it, or do we
> just don't see it? Ne, Mg are expected further out in the ejecta.
> Fitting shows that Ne, Mg factor 10 less than standard models. What we
> see in Cas A is a lot of Si and more massive elements. Could this be
> supportive
> for a small progenitor, with a high explosion energy (all Ne, Mg gets
> processed)?
>
> -Apart from the Ti-44 elements, we might be able to come up with
> Chromium measurements.
>
>
> - Evidence for Fe-K at 6.4 keV from close to shock front or from dust
> (Kazik once wrote a paper on that)
>
>
>
>
> Jacco
>
> On Fri, 2004-03-26 at 18:50, Una Hwang wrote:
> > Dear VLP'ers,
> >
> > Here are some logistical details about where to stay, how to
> > get to NRL, etc for the Cas A meeting on May 6th/7th. At the
> > end is a tentative agenda and some ideas for projects to get
> > people thinking and start some discussion. A firmer agenda
> > will be compiled and distributed closer to the time. We plan
> > to start at 10am on May 6th to give anyone traveling from
> > the east coast time to get here on that morning. The
> > conference room is booked 8am - 5pm each day, so we can
> > start earlier on May 7th. Contact us with any questions or
> > difficulties.
> >
> > Una Hwang
> > Martin Laming
> >
> > Most of these details, plus maps are available at
> > http://lheawww.gsfc.nasa.gov/users/hwang/nrl.html
> >
> > Directions to NRL:
> > http://www.nrl.navy.mil/content.php?P=PLANNINGVISIT
> >
> > The meeting will be in room 113 of building 226. Building
> > 209 houses the Space Science Division. Martin's office is
> > room 152 in bldg 209.  See website above for NRL map.
> >
> > NRL is accessible by public transport, but this is not
> > recommended. Take the green line metro to Anacostia, and
> > then change to an A4 or A5 bus (cost 25c with a bus transfer
> > ticket obtained inside the metro). A5 is a few minutes
> > quicker, but runs less often.
> >
> > Much better to drive. The locals (Una, Martin, and possibly
> > some others) will be able to give lifts to people without
> > cars staying in hotels in College Park or Greenbelt, which
> > are not far off their normal routes to NRL. Some parking
> > spaces close to Building 226 will be reserved for us.
> > Otherwise parking is easiest to find between buildings 226
> > and 209 and the river (see map). Convenient hotels are here
> > (with the first, Quality Inn and Suites probably being the
> > most convenient, closest to the metro which also serves
> > Union Station and Reagan National Airport, etc):
> >
> > http://www.inform.umd.edu/CampusInfo/Departments/guest/visitor/localhotel
> >.html
> >
> > Some of the more reasonably priced hotels in Alexandria from
> > Martin's AAA book; might be more reasonable for anyone with
> > their own car, especially if driving up from points south.
> >
> > Washington Suites-Alexandria $79-$159
> > 703 370 9600, 100 S. Reynolds St., Alexandria VA 22304
> >
> > Holiday Inn Eisenhower Metro $99-$155
> > 703 960 3400, 2460 Eisenhower Ave, Alex VA 22314
> >
> > Red Roof Inn $69-$89
> > 703 960 5200, 5875 Richmond Hwy, Alex VA 22303
> >
> > Traveller's Motel $65-$79
> > 703 329 1310, 5916 Richmond Hwy, Alex VA 22303
> >
> > One of our regular visitors to NRL, Peter Sturrock, likes to
> > stay in Alexandria Old Town itself. The Holiday Inn there is
> > $199-229, (703 549 6080, 480 King St, Alex VA 22314) if
> > anyone likes the good life.  They do advertise AAA
> > discounts. I am also told that the Watergate is quite
> > nice... but way over anyone's per diem!
> >
> >
> > Cas A VLP Analysis Meeting Tentative Agenda
> > -------------------------------------------
> >
> > May 6th Start at 10.00 am
> > -------------------------
> > Discussion of Specific Proposal Goals, i.e., element
> > abundances, nucleosynthesis, asymmetric explosions and the
> > science/data analysis needed to move this forward:
> >
> > Welcome to NRL and Introduction to Cas A proposal,
> > spectral modelling and data reduction/analysis.
> > Martin Laming/Una Hwang
> >
> > Cas A Dynamics Measurements. Tracey Delaney/Larry Rudnick
> >
> > May 7th
> > -------
> > Other topics:
> >
> > Models for hydrodynamics in the jet regions How are
> > Truelove/McKee SNR models changed in clumpy plasma?
> > (Roger Chevalier and Alexei Khokhlov have indicated that
> > they are more likely to be available on the Friday, and
> > their expertise is clearly central to these topics).
> >
> > Synchrotron emission and particle acceleration, electron-ion
> > equilibration at shock fronts at elsewhere.
> >
> > Point source.
> >
> > Potential projects so far, with a few tentative names:
> > -----------------------------------------------------
> > Fe census, - Hwang/Laming
> >
> > Quantitative Fe vs Si morphology, - Hughes
> >
> > Proper motions and Doppler shifts of X-ray knots , -
> > Delaney/Rudnick?
> >
> > Detailed fitting of a number of X-ray knots for explosion
> > asymmetry and element abundances, - everyone who can bear
> > it!
> >
> > Search for Fe knots in the jet regions. If overdense
> > compared to elsewhere, then Fe will be thermally unstable
> > for a wider range of initial mass coordinates and might not
> > be visible. Can we place limits on this if Fe is not found?
> >
> > Characterize southwest counterjet
> >
> > Other faint high velocity ejecta, - Hughes
> >
> > Look for inner shell lines of Sc and Ca in the faint inner
> > regions, as 44Ti and 44Sc decay by K shell electron capture
> > to 44Sc and 44Ca?
> >
> > Refine models to produce theoretical spectra (not just
> > ionization balance, and electron temperature), for direct
> > comparison with data. Might not be able to bypass XSPEC
> > completely, but this would be an important check.
> >
> > Point source and interaction with ejecta, - Hughes

-- 

Martin Pohl                                   mkp@iastate.edu
Department of Physics and Astronomy           Tel: (515) 294 6448
Iowa State University                         Fax: (515) 294 6027
Ames, Iowa 50011-3160                         Mob: (515) 231 7430