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

C. Alcock; R.A. Allsman; D.R. Alves; T.S. Axelrod; A.C. Becker; D.P. Bennett; K.H. Cook; A.J. Drake; K.C. Freeman; M. Geha; K. Griest; M.J. Lehner; S.L. Marshall; D. Minniti; C.A. Nelson; B.A. Peterson; P. Popowski; M.R. Pratt; Peter Quinn; C.W. Stubbs; W. Sutherland; T. Vandehei; D.L. Welch

doi:10.1086/323438

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

C. Alcock, R.A. Allsman, D.R. Alves, T.S. Axelrod, A.C. Becker, D.P. Bennett, K.H. Cook, A.J. Drake, K.C. Freeman, M. Geha, K. Griest, M.J. Lehner, S.L. Marshall, D. Minniti, C.A. Nelson, B.A. Peterson, P. Popowski, M.R. Pratt, Peter Quinn, C.W. StubbsW. Sutherland, T. Vandehei, D.L. Welch

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Abstract

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.

Original language	English
Pages (from-to)	337-347
Journal	The Astrophysical Journal
Volume	562
Issue number	1
DOIs	https://doi.org/10.1086/323438
Publication status	Published - 2001

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Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., Cook, K. H., Drake, A. J., Freeman, K. C., Geha, M., Griest, K., Lehner, M. J., Marshall, S. L., Minniti, D., Nelson, C. A., Peterson, B. A., Popowski, P., Pratt, M. R., Quinn, P., ... Welch, D. L. (2001). Astrometry with the MACHO data archive. I. High proper motion stars toward the Galactic bulge and Magellanic Clouds. The Astrophysical Journal, 562(1), 337-347. https://doi.org/10.1086/323438

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

abstract = "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.",

author = "C. Alcock and R.A. Allsman and D.R. Alves and T.S. Axelrod and A.C. Becker and D.P. Bennett and K.H. Cook and A.J. Drake and K.C. Freeman and M. Geha and K. Griest and M.J. Lehner and S.L. Marshall and D. Minniti and C.A. Nelson and B.A. Peterson and P. Popowski and M.R. Pratt and Peter Quinn and C.W. Stubbs and W. Sutherland and T. Vandehei and D.L. Welch",

year = "2001",

doi = "10.1086/323438",

language = "English",

volume = "562",

pages = "337--347",

journal = "The Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing",

number = "1",

}

Alcock, C, 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, P, Stubbs, CW, Sutherland, W, Vandehei, T & Welch, DL 2001, 'Astrometry with the MACHO data archive. I. High proper motion stars toward the Galactic bulge and Magellanic Clouds', The Astrophysical Journal, vol. 562, no. 1, pp. 337-347. https://doi.org/10.1086/323438

TY - JOUR

T1 - Astrometry with the MACHO data archive. I. High proper motion stars toward the Galactic bulge and Magellanic Clouds

AU - Alcock, C.

AU - Allsman, R.A.

AU - Alves, D.R.

AU - Axelrod, T.S.

AU - Becker, A.C.

AU - Bennett, D.P.

AU - Cook, K.H.

AU - Drake, A.J.

AU - Freeman, K.C.

AU - Geha, M.

AU - Griest, K.

AU - Lehner, M.J.

AU - Marshall, S.L.

AU - Minniti, D.

AU - Nelson, C.A.

AU - Peterson, B.A.

AU - Popowski, P.

AU - Pratt, M.R.

AU - Quinn, Peter

AU - Stubbs, C.W.

AU - Sutherland, W.

AU - Vandehei, T.

AU - Welch, D.L.

PY - 2001

Y1 - 2001

N2 - 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.

AB - 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.

U2 - 10.1086/323438

DO - 10.1086/323438

M3 - Article

SN - 0004-637X

VL - 562

SP - 337

EP - 347

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 1

ER -

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

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