SUMMARY OF PROPOSAL 41023
DR. KATSUJI KOYAMA
KYOTO UNIV.
KYOTO JAPAN 606-01
KYOTO
KITASHIRAKAWA

  E-mail: KOYAMA@CR.SCPHYS.KYOTO-U.AC.JP	Tel: (81)-75-753-3843	Fax: (81)-75-701-5377
  Medium: 2.5GB8MM

Subject: STARS                                                       
  Title: X-RAY DETECTION FROM PROTOSTARS IN TAURUS CLOUDS                                


Abstract:
 Recent ROSAT and ASCA observations of nearby molecular clouds have shown that X-ray
 emission starts very early in stellar evolution. Whereas X-ray emission from T Tauri
 stars is now fairly well understood in terms of magnetic activity, the high-energy
 (up to 10 keV) radiation from protostars is not understood. The X-ray emission from
 young stars may have profound implications on star formation, envelope collapse, and
 outflow acceleration at early stages. We want to confirm the detection of
 protostars, which is still tentative because of extinction/confusion problems. We
 take advantage of the ASCA's unique capability to detect higher-energy X-rays (which
 suffer less extinction), but selecting isolated protostars (to avoid confusion with
 closeby young stars, as has been the case until now).

 Co-Is:
   1  Y. TSUBOI           	KYOTO UNIV.                   JAPAN     
      (No Co-I contact data)
   2  T. MONTMERLE        	SACLAY                        FRANCE    
   3  PH. ANDR\'E         	SACLAY                        FRANCE    
   4  FEIGELSON E.D.      	PHYSICS AND ASTRO.            USA       


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
L1489                  3   61.1796   26.3161    40   N   Y   P  0.10000   1