NEAR-INFRARED 0''.15 RESOLUTION IMAGING OF THE GALACTIC-CENTER

被引:83
|
作者
ECKART, A
GENZEL, R
HOFMANN, R
SAMS, BJ
TACCONIGARMAN, LE
机构
[1] Max-Planck-Institut für Extraterrestrische Physik, W-8046 Garching bei München, Giessenbachstrasse
来源
ASTROPHYSICAL JOURNAL | 1993年 / 407卷 / 02期
关键词
GALAXIES; NUCLEI; GALAXY; CENTER; INFRARED; STARS;
D O I
10.1086/186810
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present deep 1.6 (H) and 2.2 mum (K) images of the central parsec of the Galaxy at a resolution of 0.''15. Most of the flux in earlier seeing-limited images comes from about 340 unresolved stellar sources with K-magnitudes less-than-or-equal-to 14. Most of the fainter stars in the central parsec are likely M- rather than K-giants. The IRS 16 and 13 complexes are resolved into about 25 and six sources, a number of which are probably luminous hot stars. We confirm the presence of a blue near-infrared object (K almost-equal-to 13) at the position of the compact radio source Sgr A*. The spatial centroid of the number distribution of compact sources is consistent with the position of Sgr A* but not with a position in the IRS 16 complex. The stellar surface density is very well fitted by an isothermal cluster model with a core radius of 0.15 +/- 0.05 pc. The central stellar density is close to 10(8) M. pc-3. Buildup of massive stars by collisional merging of lower mass stars and collisional disruption of giant atmospheres are very probable processes in the central 0.2 pc.
引用
收藏
页码:L77 / L80
页数:4
相关论文
共 50 条
  • [1] IMAGING AND POLARIMETRY OF THE GALACTIC-CENTER IN THE NEAR-INFRARED
    BAILEY, J
    HOUGH, JH
    AXON, DJ
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1984, 208 (03) : 661 - &
  • [2] MAPPING AND IMAGING OF THE GALACTIC-CENTER IN THE NEAR-INFRARED
    STOREY, JWV
    [J]. AIP CONFERENCE PROCEEDINGS, 1982, (83) : 85 - 90
  • [3] HIGH ANGULAR RESOLUTION SPECTROSCOPIC AND POLARIMETRIC IMAGING OF THE GALACTIC-CENTER IN THE NEAR-INFRARED
    ECKART, A
    GENZEL, R
    HOFMANN, R
    SAMS, BJ
    TACCONIGARMAN, LE
    [J]. ASTROPHYSICAL JOURNAL, 1995, 445 (01): : L23 - L26
  • [4] LINEAR POLARIZATION OF GALACTIC-CENTER IN NEAR-INFRARED
    HOUGH, JH
    MCCALL, A
    ADAMS, DJ
    JAMESON, RF
    [J]. ASTRONOMY & ASTROPHYSICS, 1978, 69 (03) : 431 - 433
  • [5] A LARGE NEAR-INFRARED IMAGE OF THE GALACTIC-CENTER
    GATLEY, I
    JOYCE, R
    FOWLER, A
    DEPOY, D
    PROBST, R
    [J]. CENTER OF THE GALAXY, 1989, 136 : 361 - 364
  • [6] A LARGE NEAR-INFRARED IMAGE OF THE GALACTIC-CENTER
    GATLEY, I
    JOYCE, R
    FOWLER, A
    DEPOY, D
    PROBST, R
    [J]. IAU SYMPOSIA, 1989, (136): : 361 - 364
  • [7] HIGH-RESOLUTION NEAR-INFRARED IMAGING AND COMPUTER-SIMULATIONS OF A LUNAR OCCULTATION OF THE GALACTIC-CENTER
    SIMONS, DA
    BECKLIN, EE
    HODAPP, KW
    [J]. IAU SYMPOSIA, 1989, (136): : 509 - 512
  • [8] HIGH-RESOLUTION NEAR-INFRARED IMAGING AND COMPUTER-SIMULATIONS OF A LUNAR OCCULTATION OF THE GALACTIC-CENTER
    SIMONS, DA
    BECKLIN, EE
    HODAPP, KW
    [J]. CENTER OF THE GALAXY, 1989, 136 : 509 - 512
  • [9] HIGH-RESOLUTION INFRARED IMAGING OF THE GALACTIC-CENTER
    DEPOY, DL
    SHARP, NA
    [J]. ASTRONOMICAL JOURNAL, 1991, 101 (04): : 1324 - 1328
  • [10] INFRARED IMAGING OF IRAS SOURCES NEAR THE GALACTIC-CENTER
    MONETI, A
    GLASS, I
    MOORWOOD, A
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1992, 258 (04) : 705 - 714