Mark Giampapa
NSO/T Scientific Staff
Areas of Interest
Stellar Dynamos, Stellar Cycles and Magnetic Activity, Asteroseismology
Recent Research Results
Giampapa and his colleagues, S. Baliunas (SAO) and R. Radick (AFRL), have
completed a
survey of chromospheric Ca II H and K line emission in the numerous solar
counterparts in the
solar-age and solar-metallicity open cluster M67, using the WIYN telescope
with the Hydra
multiobject spectrograph. The results indicate the range of potential
amplitudes of the solar
cycle through observations of about 100 Sun-like stars. This is critical to
know in view of the
impact of solar variations on long-term global climate changes. The results
will be submitted
for publication in late FY99 or early FY00. In addition, M. Giampapa and his
collaborators have
implemented a long-term program with WIYN/Hydra to begin an investigation of
long-term
variability analogous to what would be expected from cycle-like modulations
of chromospheric activity.
Future Research Plans
Giampapa intends to continue working on the above areas. As a member of the
SONG (Stellar
Oscillations Network Group), Giampapa will be participating in an HST
experiment to detect p-mode oscillations in solar-type stars (PI: J. Valenti). In collaboration with C. Pilachowski
(NOAO), S. Barden (NOAO/KPNO), J. Valenti (NOAO/KPNO) and D. Deming
(NASA/GSFC), Giampapa is leading an effort to measure line bisectors in
stars that have been
reported to have Jupiter-like companions. The results will illustrate the
potential contribution of
intrinsic stellar atmospheric motions to apparent Doppler shifts that could
be misinterpreted as
being due to planetary companions. This investigation is supported by a
grant from the NASA
Origins of Solar Systems Program. The data for the project have been
obtained at the McMath-Pierce and will be undergoing analysis in collaboration with an REU student
during the
summer of FY99. Submission of the results for publication is expected during
FY00.
Service
M. Giampapa serves as the Deputy Director for the National Solar Observatory
with specific
responsibility for the Tucson/Kitt Peak program. In this role, he has
overview responsibilities
for the scientific and instrument development activities at NSO/T, including
the SOLIS project,
and the conduct and support for observing programs at the NSO McMath-Pierce
Telescope
Facility on Kitt Peak. Giampapa is the Instrument Scientist for the SOLIS
Integrated Sunlight
Spectrometer (ISS); chairman of the Tucson site Project Review Committee
(PRC) and serves as
a member of the full NSO PRC; and, Program Scientist for the McMath-Pierce
nighttime
program which is currently operated with grant funds contributed by Principal
Investigators.
As Deputy Director, Giampapa assists the NSO Director in the development of
program plans
and budgets, including budgetary decisions and their implementation.
Giampapa is an Adjunct Astronomer at the University of Arizona. He also
serves as a member
of the editorial board for New Astronomy Reviews.
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Updated: 28Jun1999