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