DIAGONALIZATION OF THE VELOCITY VARIANCE COVARIANCE-MATRIX AS A DIAGNOSTIC OF MASER PROPER MOTIONS

被引:12
作者
BLOEMHOF, EE
机构
关键词
H-II REGIONS; ISM; INDIVIDUAL; W3(OH); KINEMATICS AND DYNAMICS; MASERS; METHODS; MISCELLANEOUS;
D O I
10.1086/186790
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A new computational technique is presented for analyzing the velocity fields mapped by VLBI (very long baseline interferometry) proper-motion studies of astrophysical masers. Such studies, despite yielding kinematic information of great detail on unprecedented spatial scales, generally cannot determine the absolute motions of maser spots through the sky, or with respect to other nearby objects. The resulting ambiguity hinders physical interpretation, but can be partially overcome by constructing and diagonalizing the velocity variance/covariance matrix (VVCM) for a set of relative maser motions. Applied to the OH masers in W3(OH), VVCM diagonalization provides strong support for the cometary bow-shock model.
引用
收藏
页码:L75 / L78
页数:4
相关论文
共 14 条
[1]   KINEMATICS OF W3(OH) - 1ST PROPER MOTIONS OF OH MASERS FROM VLBI MEASUREMENTS [J].
BLOEMHOF, EE ;
REID, MJ ;
MORAN, JM .
ASTROPHYSICAL JOURNAL, 1992, 397 (02) :500-519
[2]   A STUDY OF THE GROUND-STATE HYDROXYL MASER EMISSION ASSOCIATED WITH 11 REGIONS OF STAR FORMATION [J].
GAUME, RA ;
MUTEL, RL .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1987, 65 (02) :193-253
[3]   PROPER MOTIONS AND DISTANCES OF H2O MASER SOURCES .1. THE OUTFLOW IN ORION-KL [J].
GENZEL, R ;
REID, MJ ;
MORAN, JM ;
DOWNES, D .
ASTROPHYSICAL JOURNAL, 1981, 244 (03) :884-902
[4]   PROPER MOTIONS AND DISTANCES OF H2O MASER SOURCES .2. W51-MAIN [J].
GENZEL, R ;
DOWNES, D ;
SCHNEPS, MH ;
REID, MJ ;
MORAN, JM ;
KOGAN, LR ;
KOSTENKO, VI ;
MATVEYENKO, LI ;
RONNANG, B .
ASTROPHYSICAL JOURNAL, 1981, 247 (03) :1039-1051
[5]  
GUILLOTEAU S, 1985, ASTRON ASTROPHYS, V153, P179
[6]  
GUILLOTEAU S, 1983, ASTRON ASTROPHYS, V126, P10
[7]   DISTANCE AND KINEMATICS OF THE W49N H2O MASER OUTFLOW [J].
GWINN, CR ;
MORAN, JM ;
REID, MJ .
ASTROPHYSICAL JOURNAL, 1992, 393 (01) :149-164
[8]   LIMITS ON REFRACTIVE INTERSTELLAR SCATTERING TOWARD SAGITTARIUS-B2 [J].
GWINN, CR ;
MORAN, JM ;
REID, MJ ;
SCHNEPS, MH .
ASTROPHYSICAL JOURNAL, 1988, 330 (02) :817-827
[9]  
Reid M. J., 1988, GALACTIC EXTRAGALACT, P255
[10]   G34.3 + 0.2 - A COMETARY H-II REGION [J].
REID, MJ ;
HO, PTP .
ASTROPHYSICAL JOURNAL, 1985, 288 (01) :L17-L19