Harold A. Weaver
(Last Updated: 1 November 2001) |
First off, my friends call me Hal. I am a Research Scientist in the
Department of Physics and Astronomy
at the
The Johns Hopkins University
in Baltimore, Maryland. Most of my scientific work is related to comets
and their relevance to the origin of the solar system, but I am also
interested in planets and satellites, the interstellar medium, and the
formation and evolution of planetary systems.
Here is a brief
biographical sketch ,
that provides some background on my research career.
Here is a PDF version of my
vitae .
Or, if you prefer, you can grab this
postscript version .
Here is the PDF version of my
publications .
Again, you might instead want to download the
postscript version .
Comments on this WWW page can be sent to Hal Weaver via e-mail at
weaver@pha.jhu.edu .
Read about
the breakup of Comet C/1999 S4 (LINEAR).
You can dowload a reprint of the paper
An Infrared Investigation of Volatiles in Comet 21P/Giacobini-Zinner
(PDF format, 234 KB),
which was recently published in Icarus
(v. 142, pp. 482-497, 1999).
Unfortunately, Academic Press made an error in typesetting
the abstract and published an erratum
(v. 144, p. 203, 2000), which I'll post as soon as AP's website
comes back online.
A reprint of the invited review paper by Weaver and Lamy,
Estimating the Size of Hale-Bopp's Nucleus ,
which was presented at the First International Hale-Bopp Conference,
can be found here.
The paper was published
in a special issue of Earth, Moon, Planets,
in late-1999 (v. 79, pp. 17-33).
A reprint of our paper on IRTF results from comet Hale-Bopp,
Infrared Spectroscopy of Comet Hale-Bopp ,
which was presented at the First International Hale-Bopp Conference,
can be found here. This
is a postscript file and is 477KB long. The paper was published
in a special issue of Earth, Moon, Planets,
in late-1999 (v. 78, pp. 71-80).
We did a quick search for any possible companions to comet Hale-Bopp,
using all of the post-perihelion HST images. The results are described
in this
Baby Bopp memo .
A description of the
August 1997 HST observations of Comet Hale-Bopp
can be found here.
A mosaic containing all
HST Comets
observed since the December 1993 servicing mission can be found here.
A preprint of an
HST Comet Review Paper
that I wrote for the ``Science with the GHRS'' symposium held at the
Goddard Space Flight Center in September 1996 can be found here. This
is a postscript file and is 437KB long. This paper should be published
in a PASP Conference Proceedings soon (i.e., fall of 1997).
A reprint of an
SL9 Review Paper
that I wrote for IAU Symposium No. 178, "Molecules in Astrophysics:
Probes and Processes", can be found here. This is a postscript file and
is 1.355MB long. The meeting was held in Leiden, The Netherlands, in
June 1996 and the proceedings were published this summer by Kluwer
Academic Publishers. Beware that you may have problems displaying and
printing figures 2, 3, and 7 in the above-mentioned postscript file.
These figures were created by Kevin Zahnle on a Macintosh, and I've
always had trouble with them on my UNIX system. If you want hardcopy
of my paper, I have a limited number of reprints that I can send
you upon request.
Go to my
original
Comet Hale-Bopp site
to get a description of the 1995 Hubble Space Telescope observations
of this now famous comet.
Since we also took some HST images of Hale-Bopp between April 1996 and
October 1996, I created a
new figure
which shows how Hale-Bopp transformed from a ``sprinkler'' into
a ``porcupine''.
A paper describing the results from our HST and IUE programs on Hale-Bopp
appears in the 28 March 1997 issue of Science magazine.
Figure 1
of that paper is a mosaic showing HST images of the comet taken during
each of the eight observing periods. I've also included the version of
the September 1995 HST image that appeared in Nature magazine last year,
a higher resolution version of the September 1996 HST image, and a
processed version of the latter that enhances the jet structures.
You can download the full text version of the
Science paper in PDF format , but the file size is 467KB.
As part of my public outreach activities, I designed a
WWW page for NOVA
that was put online during the re-broadcast of a NOVA program
called ``The Doomsday Asteroid'', which discussed the possibility
of an asteroid or comet hitting the Earth. This site contains a
lot of general information on comets and is meant to be accessible
to the non-scientific public.
For the apparition of Comet Hyakutake during the spring of 1996, I put
together a
Hyakutake WWW page
for my son's elementary school. This site contains some general information
on comets that I hope can be understood by school children and their
parents.
For the apparition of Comet Hale-Bopp in 1997, I put together a
simple Hale-Bopp WWW page for my son's elementary school.
