Spiral 銀河における星形成史について

Spiral

1.

2.HST =

z1 SFR densityzSFRz 1Bell 2004

3.GOODS Version 2.0 HST ACS Imaging Data.TEAM KECK TREASURY REDSHIFT SURVEY IN THE GOODS-N FIELD.IRAF, GALFIT.http://archive.stsci.edu/pub/hlsp/goods/v2/http://tkserver.keck.hawaii.edu/tksurvey/data_access/map/tks_map.php

3.13.2. GALFITGOOD-N

3.2exponential profile.

de Vaucouleurs profile.

AB

3.3GALFITPSF

BV

IZ

z = 0.10556200 pixel11 kpcDA = 380 kpcDL = 470 kpci band

z = 0.25368200 pixel22 kpcDA = 780 kpcDL = 1200 kpcv band

z = 0.84705100 pixel22 kpcDA = 1500 kpcDL = 5200 kpcz band

3.4

z = 0.10556 B-V

z = 0.10556 V-I

z = 0.10556 I-Z

z = 0.27746 B-V

z = 0.27746 V-I

z = 0.27746 I-Z

z = 0.56026 B-V

z = 0.56026 V-I

z = 0.56026 I-Z

GALAXEVGALAXEVABHST/ACSF435WF606WF775WF850lp

Z:

age

1IMF:mmdm 1

IMF

2SFR

:

3

H

=

=0.3m=0.7MW

=25Gyrz=10.5

z=1

Fitting best fit

(1)

(2) : agebulgedisk

(3) : bulgediskbulge

(4) : dustdustbulgedisk

(5) : SFRbulgedisk

zHSTBz solor-metallicitymetallicity

1012M

Abraham R.G., Ellis R.S., Fabian A.C., Tanvir N.R. and Glazebrook K., 1999, MNRAS, 303, p.641-658 Bruzual A., G., Charlot, S., 2003, MNRAS, in press Charlot, S., Fall, S. M., 2000, ApJ, 539, 718 Fukugita, M., Ichikawa, T., Gunn, J. E., Doi, M., Shimasaku, K., Schneider, D.P. 1996, AJ, 111,1748 Schneider P., 2006, Extragalactic Astronomy and Cosmology, Springer