University Press (Beaumont, Tex.), Vol. 70, No. 3, Ed. 1 Friday, September 3, 1993 Page: 4 of 8
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Jubble space telescope
)bserves mysterious star
SAN FRANCISCO (UPI) —
eering into the heart of a globular
ar cluster, the Hubble Space
elescope detected optical and ultra-
olet light from a mysterious double
;ar which, until now, was known
nly by its violent X-ray bursts.
University of California at
erkeley astronomers said TUesday
He unusual object has intrigued
pace scientists for more than two
ecades — but this is the first time
hey have been able to see it in visi-
ile light.
Before Hubble was sent into
irbit, it was impossible to pick out
he faint blue counterparts to X-ray
iursters buried in the crammed cores
f globular clusters, said head
esearcher Ivan King, an astronomy
irofessor.
With its high resolution and ultra-
violet sensitivity, the space telescope
distinguished the star from the crowd
it the center of NGC 6624, a cluster,
some 30,000 light years from Earth,
in the constellation Sagittarius.
In a companion article in the
Astrophysical Journal Letters, the
astronomers theorized X-rays from
the center of the double-star system
are absorbed by a surrounding disk of
gas and dust Energy is re-emitted as
ultraviolet light.
“X-ray bursters like this provide
insights into the physics of matter
falling onto gravitationally powerful,
compact objects such as neutron stars
and black holes," said Jonathan
Arons, professor and chairman astron
Friday, September 3, 1993
omy.
“We think this mechanism is the
primary source of energy in a variety
of exotic bodies, ranging from X-ray
sources in our galaxy to quasars —
the most distant known objects.”
The astronomers were taken
aback by their find.
“I was just doing a routine study
of star dynamics and population in
the cluster,” King said. “My decision
to take an ultraviolet image was a
shot in the dark. This star could
never have been seen with ground-
based telescopes.”
The position of the binary star
coincides with that of an X-ray source
known as 4U 1820-30, first noted in
the 1970s. The Hubble observations
enabled King to pinpoint the cluster
center at a different location from the
site estimated from a ground-based
telescope data.
The system contains a neutron
star — a dense and compact corpse of
a massive star that exploded ages ago
— that is devouring its larger but
less-massive white-dwarf companion
— the remnant of a burned-out, sun-
like star. The two bodies — 100,000
miles apart, or less than half the dis-
tance between Earth and moon —
complete an orbit about each other
every 11 minutes, a record among all
known binary systems.
The astronomers now plan to look
for brightness changes during the
binary orbit and for a mysterious
flickering at 30 to 40 times per sec-
ond in X-rays.
Arons, professor and chairman astron- ond in X-rays. L——________—————
Medical school minority enrollment too low, AMA says
. . t “Introducing managed comp
CHICAGO (UPI) — The num-
ber of applications to medical schools
is approaching a new record, but
minority enrollment remains too low,
the American Medical Association
said this week.
In a separate report, experts
warned medical schools that health
care reform efforts could substantial-
ly change academic medical centers’
incomes — and force them to re-
think how some students get their
hands-on experience.
“We have more applicants than
we know what to do with,” said Dr.
Harry Jonas, director of the AMA’s
Undergraduate Medical Education
Reform efforts could change incomes of medical centers
Division. “It appears this year we’ll
have the highest number we’ve ever
had in history.”
Of the 37,410 medical school
applicants in 1992, 17,464 were
accepted. Although minority applica-
tions went up 12 percent from 1991
to 1992, there were only 4,034 appli-
cations from blacks, Mexican-
Americans, Puerto Ricans and
American Indians.
The number of applications
received in 1992 was 39 percent
higher than the 25,915 applications
sent to medical schools in 1989. The
record was set in 1974, when 42,600
applicants tried getting in the 141
accredited medical schools in the
United States and Canada.
About 42 percent of both appli-
cants and the 1992 entering class
were women, the report said, a
marked increase from 1972, when
only 17 percent of applicants were
women.
“The trend in women has been
dramatic, but the trend for minorities
has not been dramatic. It’s still a
problem,” said Jonas, in a telephone
interview.
The only minority group that is
producing a growing number of med-
ical students is Asian-Americans,
which now make up more than 15
percent of incoming students.
Jonas said the medical profession
needs to boost its outreach programs,
getting inner city and other high
school students interested in
medicine and giving them opportu-
nities to get involved in the career
early.
“The other thing that is a prob-
lem (is that) even after minorities get
into medical schools, we don’t have
enough minority faculty members.
So there is a lack of role models,”
Jonas said.
The second report, also published
in Wednesday’s Journal of the
American Medical Association, said
health care reform — and the
expected shift of doctors from spe-
cialties to primary and preventive
care — could alter the income flows
to academic medical centers.
“Introducing managed competi-
tion will result in decreased hospital
and practice plan revenues,” said the
AMA’s Task Force on Health
Systems Reform and Medical
Education.
This is due to reduced demand
for the specialized, high technology
services supplied by the academic
medical center,” the Task Force said.
Such a change means schools may
have less discretionary revenue. And
they will need to rely more heavily
on community health care settings to
provide practical experience for
those entering medical schools, the
report said.
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Bankston, Mark. University Press (Beaumont, Tex.), Vol. 70, No. 3, Ed. 1 Friday, September 3, 1993, newspaper, September 3, 1993; Beaumont, Texas. (https://texashistory.unt.edu/ark:/67531/metapth500270/m1/4/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting Lamar University.