SUMMARY OF PROPOSAL 41099
DOCTOR NOBUO ARIMOTO
UNIVERSITY OF TOKYO
TOKYO JAPAN 181
MITAKA
2-21-1 OSAWA

  E-mail: ARIMOTO@MTK.IOA.S.U-TOKYO.AC.JP	Tel: 0422-34-3732	Fax: 0422-34-3749
  Medium: 4GBDAT

Subject: NORMAL GALAXIES                                             
  Title: X-RAY SPECTROSCOPY OF LOW LX/LB GIANT ELLIPTICALS NGC3607/NGC3608 :DO SNIA PLAY A ROLE IN ELLIPTICALS?


Abstract:
 We propose to perform X-ray spectroscopy of low Lx/Lb ellipticals NGC3607 and
 NGC3608. Hydrodynamical calculations by Ciotti et al. (1991) suggest that these low
 Lx/Lb ellipticals are in gas outflow phase due to high SNIa explosion rate. While
 ASCA has recently reveals that giant elliptical galaxies contain little iron in
 their hot gas, suggesting that virtually no SNIa nucleosynthesis in ellipticals. To
 understand this inconsistency, we propose to get direct evidence of SNIa in low
 Lx/Lb ellipticals. If these galaxies are really in the outflow phase, their
 temperature should be systematically higher and metallicity higher than high Lx/Lb
 gas-rich ellipticals. X-ray surface brightness distribution will be systematically different.

 Co-Is:
   1  KYOKO MATSUSHITA    	UNIVERSITY OF TOKYO           JAPAN     
      MATUSITA@MIRANDA.PHYS.S.U-TOKYO.AC.JP	03-3812-2111 EX4173
   2  KAZUO MAKISHIMA     	UNIVERSITY OF TOKYO           JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
NGC3607/3608           2  169.2250   18.0533    80   N   Y   P  0.05000   1 

REMARKS:           NGC3608 (11H16M59S,+18D08M57S) SHOULD BE ALSO IN THE FIELD OF VIEW.