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The M 80 Blue Stragglers
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Francesco R. Ferraro was first
intrigued by Astronomy as a child. He was
born in a town on the beautiful sea of Puglia
but he mostly grew up in Matera, a small
city in south of Italy, in the so-called
``Magna Grecia'' area, a region full of
ancient history of the Greek colonization.
Naturally his initial main interest was
Archeology. While he was collaborating with
an amateur Archeologist group, there was
an amateur astronomy group working next
door to the Archeologists. The curiosity
which led him to look in at next door's
meetings was fatal: after many years of
freezing nights spent following luminosity
variability of nearby variable stars, he
started to study Astronomy at the Bologna
University where he earned a PhD degree
in Astronomy.
Ferraro's principal field of investigation
is the study of stellar evolution and stellar
population in old stellar systems. His astronomical
work is based on observations made with
telescope on the Earth (mainly European
Telescopes in Chile) and in space (Hubble
Space Telescope). Thus at the end he has
finally succeeded in reconciling both his
passions indulging in an Astro-Archeology
approach to the problem of the formation
and the evolution of our Galaxy, via the
systematic study of the oldest known fossils
of that remote epoch: the Galactic Globular
Clusters. Since his initial hobby became
his vocation, he has turned his interest
toward figurative art and currently enjoys
painting. |
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Barbara Paltrinieri was born
and raised in Sassuolo, a small town near
Modena, in the North of Italy. Her first
experience with astronomy was when she was
a small child---in September she always
was in the country and her grandmother,
during the grape harvest, told her the mythological
Greek history about stars. The story of
Andromeda and Perseus was her favorite.
It was inevitable that she study astronomy
at Bologna University, but her passion for
the Earth was always high and led her to
other subjects as well. In 1996, following
the love for grapes that her grandmother
pass to her, she became a sommelier, an
expert on Italian wines. Between Earth and
sky the distance is not to great, and in
the same year, she obtain her Laurea
degree in astronomy, defending a thesis
titled ``HST Observations of the Core of
the Globular Cluster M3.''
She is a PhD student in Rome University
where she mainly works on stellar evolution.
In particular she is investigating the origin
and nature of UV bright stars, including
Blue Stragglers Star and Horizontal Branch
stars, in Globular Clusters from HST-WFPC2
data. |
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Robert
T. Rood grew up in Cary, NC. Sputnik
was launched his second year of high school
setting an atmosphere where an interest
in space was almost automatic. He, however,
did not contemplate astronomy as a career
until the 2nd year of graduate school. While
pursuing ``Particle Theory'' he had signed
up for a course called the Physics of Stellar
Interiors partly because it sounded interesting,
but more importantly because it was taught
in the afternoon and he would not have to
get up before lunch. Later that semester
he realized that his particle physics classes
seemed pointless (this being the period
of Regge Poles) and bailed out. He thus
he made the lucky blunder into astrophysics.
Although he started out as a theorist,
in the late 1970's he became convinced that
progress in understanding the late stages
of stellar evolution in globular star clusters
was not likely to be made by a purely theoretical
frontal assault. The coming of the internet
in the late 1980's made it possible for
him to be an active collaborator with stellar
observers both space and ground based. He
also does observational radio astronomy
and, as this is being written, he is sitting
at the observers computer in the control
room of the Green Bank 140 foot radio telescope.
His only surviving `hobby' is cooking (and
eating with the appropriate wines) and the
required associated gardening---where else
are you going to get good tomatoes and okra.
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Ben Dorman was born and raised
in London. He can first remember looking
at stars on a trip to Israel when he was
3 (possibly the first time he had the opportunity
considering the climate in Southern England)
and his cousin Michal, who told him to ``look
up.'' Eventually, he went to Trinity College,
Cambridge to take four years of the Mathematical
Tripos, which he took (unofficially) part
time between running the Cambridge Charities
Appeal, much to the consternation of his
Director of Studies. Then, deciding that
any more time in Cambridge would drive anyone
crazy, he decided to look toward North America
for Graduate School. He landed first at
Queen's University in Ontario, Canada (M.Sc.
on low mass stars and brown dwarfs) and
then moved to Victoria, British Columbia
(which Rudyard Kipling described as Brighton
in the Himalayas) to work with Don VandenBerg
on advanced stages of stellar evolution
and globular clusters. After his Ph.D. he
has held positions at the University of
Maryland, the University of Virginia, and
the NASA/Goddard Space Flight Center.
Early in 1995 his son Asher was diagnosed
with autism, a neurological disorder that
is marked by severe problems of communication
and social interaction. Since 1996 he has
volunteered as the Webmaster for the Autism Society of America.
In recent years Ben has been an active
collaborator with a number of teams who
have studied globular clusters with HST.
He has also worked on calibration issues
for HST photometry in the ultraviolet, and
in the theoretical determination of ultraviolet
spectra of single stars and integrated stellar
populations. He now works for Raytheon Information
Technology and Space Sciences at the X-Ray data analysis.
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- Learn more on the web:
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University
of Virginia Astronomy
- For details about research
on M 80:
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search the NASA
Astrophysics Data System for publications.
For example, look for Ferraro, F. R., Paltrinieri,
B., Fusi Pecci, F., Rood, R. T., Dorman, B.,
1998, ``Multimodal Distributions along the Horizontal
Branch,'' ApJ, 500, 311--319
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Ferraro, F. R., Paltrinieri,
B., Rood, R. T., Dorman, B. 1999, Blue Straggler
Stars: The Spectacular Population in M80, ApJ,
522, 1 September, in press is a paper that
will be published shortly.
Click to view a figure
showing a 255 nm image with bright hot horizontal
branch stars (larger open circles).
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