The Shape of the Dark Matter Distributionin NGC 720

Details The Shape of the Dark Matter Distributionin NGC 720 The Shape of the Dark Matter Distributionin NGC 720

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..284g&link_type=abstract

Chandra Proposal ID #01600067

Computer Science

Chandra Proposal Id #01600067

Scientific paper

WE PROPOSE TO STUDY THE SHAPE OF THE DARK MATTER DISTRIBUTION IN AN OPTICALLY FLATTENED LENTICULAR GALAXY, NGC720. OUR PREVIOUS ROSAT PSPC, ROSAT HRI AND ASCA OBSERVATIONS HAVE ALREADY SHOWN THE GALAXY CONTAINS A MASSIVE, DARK HALO THAT IS FLATTENED. FURTHERMORE, WE SEE CLEAR EVIDENCE OF AN "ISOPHOTAL TWIST" THAT INDICATES ADDITIONAL COMPLEXITY IN THE GRAVITATIONAL POTENTIAL, POSSIBLY TRIAXIALITY. AXAF/ACIS WILL PROVIDE MUCH TIGHTER CONSTRAINTS ON THE SHAPE OF THE POTENTIAL. THE ENERGY RESOLUTION WILL ALSO HELP CONSTRAIN ANY NON-HYDROSTATIC EFFECTS IN THE HOT GAS. THESE RESULTS WILL HAVE IMPLICATIONS FOR MODELS OF GALAXY HALO FORMATION AND GALAXY STRUCTURE.

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