Astrometry with the MACHO data archive. I. High proper motion stars toward the Galactic bulge and Magellanic Clouds

被引：16

作者：

Alcock, C ^{[1
]}

Allsman, RA

Alves, DR

Axelrod, TS

Becker, AC

Bennett, DP

Cook, KH

Drake, AJ

Freeman, KC

Geha, M

Griest, K

Lehner, MJ

Marshall, SL

Minniti, D

Nelson, CA

Peterson, BA

Popowski, P

Pratt, MR

Quinn, PJ

Stubbs, CW

Sutherland, W

Vandehei, T

Welch, DL

机构：

[1] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[3] Australian Natl Univ, Canberra, ACT 0200, Australia

[4] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[5] Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia

[6] Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA

[7] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[8] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[9] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[10] Pontificia Univ Catolica Chile, Dept Astron, Santiago 22, Chile

[11] MIT, Ctr Space Res, Cambridge, MA 02139 USA

[12] European So Observ, D-85748 Garching, Germany

[13] Univ Washington, Dept Astron & Phys, Seattle, WA 98195 USA

[14] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[15] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 562卷 / 01期

关键词：

astrometry; catalogs; solar neighborhood; stars : kinematics; stars; low-mass; brown dwarfs;

D O I：

10.1086/323438

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the preliminary results of our astrometric study of stellar motions along the lines of sight of the Magellanic Clouds and the Galactic bulge. Using 5 years of MACHO project point-spread function photometry, we find that we can easily select stars with proper motions of 0."03 yr(-1) from these very dense fields, using the characteristic shapes of their light curves. By performing astrometry on photometrically selected, candidate, high proper motion (HPM) stars in 50 deg(2), we have discovered 154 new HPM stars from similar to 55 million stars monitored by the MACHO project. These new objects have proper motions as high as 0."5 yr(-1), brightnesses ranging from V similar to 13 to V similar to 19, and V - R colors between 0.3 and 1.45.

引用

页码：337 / 347

页数：11

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