A NASA/University Joint Venture in Space Science (JOVE)

Details A NASA/University Joint Venture in Space Science (JOVE) A NASA/University Joint Venture in Space Science (JOVE)

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nasa.reptx....m&link_type=abstract

Technical Report, NASA/CR-97-206330; NAS 1.26:206330

Astronomy and Astrophysics

Astronomy

Spatial Resolution, Dwarf Galaxies, Kinetic Energy, Lenticular Bodies, Internal Energy, Astronomy, Irregular Galaxies, High Resolution, Galactic Evolution, Tides, Kinematics, Imaging Techniques, Calibrating

Scientific paper

The goal of this project has been to search for genuinely young irregular galaxies that have formed during gravitational encounters. The research has specifically involved high spatial resolution HI observations made using the VLA of NGC 5291, an interacting system consisting of a massive lenticular galaxy, companion galaxy and gaseous extensions. During the internship, data that had been collected by the mentor was calibrated, edited, reduced, and images of the HI distribution and kinematics produced. The 1995 academic year was devoted to further imaging and to the analysis of these data. Results indicated that dwarf irregular galaxies had indeed formed from material tidally removed from the interacting pair. Our observations of NGC 5291 show that some of the associations of HI and HII would be considered dwarf irregular galaxies, if they were isolated objects. Initial results were reported at the January meeting of the AAS and via a press release requested by the AAS. The 1996 academic year was devoted to further analysis of the data in an attempt to prove that the young galaxy is bound against its own internal kinetic energy and lies outside of the tidal radius of the host galaxy. An analysis method was developed that can be applied to observations of additional systems. This initial study proved the viability of the observation and analysis procedures in searching for genuinely young dwarf irregular galaxies formed in interaction fields. A scientific paper describing these observational and analysis procedures was prepared, submitted, and accepted for publication in the Astronomical Journal.

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