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pro vyhledávání: '"T. Vandehei"'
Akademický článek
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Autor:
William J. Sutherland, Marla Geha, Kenneth C. Freeman, Andrew J. Drake, T. Vandehei, David R. Alves, P. Popowski, Dante Minniti, K. H. Cook, Christopher W. Stubbs, Matthew J. Lehner, D. L. Welch, C. L. Thomas, R. A. Allsman, T. S. Axelrod, A. C. Becker, Kim Griest, S. L. Marshall, C. A. Nelson, David P. Bennett, Peter J. Quinn, Charles Alcock, Bruce A. Peterson
Publikováno v:
The Astrophysical Journal. 631:879-905
Using 7 years of MACHO survey data, we present a new determination of the optical depth to microlensing towards the Galactic bulge. We select the sample of 62 microlensing events (60 unique) on clump giant sources and perform a detailed efficiency an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82ad5c3952f383baf16698e5961246ad
https://doi.org/10.1086/432246
https://doi.org/10.1086/432246
Autor:
Andrew J. Drake, Marla Geha, William J. Sutherland, Kem H Cook, T. Vandehei, Kenneth C. Freeman, Bruce A. Peterson, P. Popowski, David R. Alves, A. W. Rodgers, Dante Minniti, Christopher W. Stubbs, C. A. Nelson, K. Griest, Charles Alcock, Douglas L. Welch, S. L. Marshall, D. P. Bennett, Géza Kovács, Peter J. Quinn, Andrew C. Becker, Matthew J. Lehner, M. R. Pratt
Publikováno v:
The Astrophysical Journal. 598:597-609
We have frequency analyzed 6391 variables classified earlier as fundamental mode RR Lyrae (RR0) stars in the MACHO database on the Large Magellanic Cloud (LMC). The overwhelming majority of these variables have been proved to be indeed RR0 stars, whe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2c5d553044344b4391c695c29ea87d6
https://doi.org/10.1086/378689
https://doi.org/10.1086/378689
Autor:
P. Popowski, Kim Griest, Matthew J. Lehner, Andrew J. Drake, Andrew C. Becker, S. L. Marshall, William J. Sutherland, Kem H. Cook, M. R. Pratt, Kenneth C. Freeman, David R. Alves, Bruce A. Peterson, Marla Geha, R. A. Allsman, Tim Axelrod, T. Vandehei, Peter J. Quinn, Dante Minniti, Christopher W. Stubbs, Douglas L. Welch, David P. Bennett, C. A. Nelson, Charles Alcock
Publikováno v:
ASTROPHYSICAL JOURNAL
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
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 selec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25d3a11723ebd7ec8218338b0dc6ea3a
https://doi.org/10.1086/323438
https://doi.org/10.1086/323438
Autor:
C. Alcock, R. A. Allsman, D. R. Alves, T. S. Axelrod, A. C. Becker, D. P. Bennett, K. H. Cook, N. Dalal, 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, P. J. Quinn, C. W. Stubbs, W. Sutherland, A. B. Tomaney, T. Vandehei, D. L. Welch, null (The MACHO Collaboration)
Publikováno v:
The Astrophysical Journal. 550:L169-L172
We report on a search for long duration microlensing events towards the Large Magellanic Cloud. We find none, and therefore put limits on the contribution of high mass objects to the Galactic dark matter. At 95% confidence level we exclude objects in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::075ce281dfb58972ea7a945758c749c8
https://doi.org/10.1086/319636
https://doi.org/10.1086/319636
Autor:
Kenneth C. Freeman, Douglas L. Welch, David P. Bennett, S. L. Marshall, Dante Minniti, Christopher W. Stubbs, P. Popowski, Bruce A. Peterson, Charles Alcock, Andrew C. Becker, K. Griest, William J. Sutherland, Matthew J. Lehner, Kem H Cook, T. Vandehei, R. A. Allsman, Katherine E. McGowan, C. A. Nelson, Austin B. Tomaney, Philip A. Charles, David R. Alves, Andrew J. Drake, Peter J. Quinn, Tim Axelrod, Marla Geha, M. R. Pratt
Publikováno v:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
We present a ~ 5-yr optical light curve of the recurrent Be/X-ray transient A0538-66 obtained as a by-product of the MACHO Project. These data reveal both a long-term modulation at P = 420.8 +/- 0.8 d and a short-term modulation at 16.6510 +/- 0.0022
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50f3e8a4d817dfab34746df684aeeb0c
https://doi.org/10.1046/j.1365-8711.2001.04041.x
https://doi.org/10.1046/j.1365-8711.2001.04041.x
Autor:
T. Vandehei, K. H. Cook, S. L. Marshall, William J. Sutherland, A. B. Tomaney, Marla Geha, D. L. Welch, David R. Alves, R. A. Allsman, Andrew J. Drake, P. Popowski, C. A. Nelson, Dante Minniti, Christopher W. Stubbs, Kenneth C. Freeman, David P. Bennett, Kim Griest, T. S. Axelrod, Christine M. Clement, Jason F. Rowe, A. W. Rodgers, Peter J. Quinn, Charles Alcock, Bruce A. Peterson, A. C. Becker, Mark Pratt, D. W. Kurtz, Géza Kovács, Matthew J. Lehner
Publikováno v:
ASTROPHYSICAL JOURNAL
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
More than 1300 variables classified provisionally as first overtone RR Lyrae pulsators in the MACHO variable star database of the Large Magellanic Cloud (LMC) have been subjected to standard frequency analysis. Based on the remnant power in the prewh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6e0c634cc905a6d1bd4c182c4b6654a
https://doi.org/10.1086/309530
https://doi.org/10.1086/309530
Autor:
A.J. Drake, Dante Minniti, Austin B. Tomaney, Katherine E. McGowan, Charles Alcock, W. Sutherland, K. Griest, R. A. Allsman, P. J. Quinn, J. van Paradijs, M. R. Pratt, Kem H Cook, T. Vandehei, Tim Axelrod, Andrew C. Becker, Bruce A. Peterson, Philip A. Charles, Marla Geha, Matthew J. Lehner, Kenneth C. Freeman, P. Popowski, Paul J. Groot, S. L. Marshall, David P. Bennett, C. A. Nelson, David R. Alves
Publikováno v:
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Monthly Notices of the Royal Astronomical Society, 316. Oxford University Press
Scopus-Elsevier
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Monthly Notices of the Royal Astronomical Society, 316. Oxford University Press
Scopus-Elsevier
Using the exceptional long-term monitoring capabilities of the MACHO project, we present here the optical history of LMC X-2 for a continuous 6-yr period. These data were used to investigate the previously claimed periodicities for this source of 8.1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11f5bae821d8adb9f414fdcf2a53d267
https://doi.org/10.1046/j.1365-8711.2000.03511.x
https://doi.org/10.1046/j.1365-8711.2000.03511.x
Autor:
William J. Sutherland, L. J. King, Mark Pratt, Peter J. Quinn, S. L. Marshall, Dante Minniti, K. H. Cook, Christopher W. Stubbs, David P. Bennett, M. J. Lehner, T. S. Axelrod, D. L. Welch, Kim Griest, R. A. Allsman, P.R. Wood, Andrew J. Drake, T. Vandehei, David R. Alves, Kenneth C. Freeman, A. C. Becker, Bruce A. Peterson, A. Tomaney, Charles Alcock
Publikováno v:
NASA Astrophysics Data System
The MACHO data base has been used to examine light curves of all red giant stars brighter than Mbol ∼ −2 in a 0.5° × 0.5° area of the LMC bar. Periods, often multiple, have been searched for in all stars found to be variable. Five distinct per
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b84b4d35cbd0d5536aedfa7c814d7dcb
https://doi.org/10.1017/s007418090020301x
https://doi.org/10.1017/s007418090020301x
Autor:
M. R. Pratt, A. Basu, Douglas L. Welch, S. L. Marshall, R. A. Allsman, David R. Alves, Kenneth C. Freeman, T. Vandehei, Dante Minniti, Christopher W. Stubbs, Kim Griest, Charles Alcock, A. W. Rodgers, Bruce A. Peterson, T. S. Axelrod, L. Baskett, Andrew C. Becker, William J. Sutherland, Peter J. Quinn, Matthew J. Lehner, Kem H Cook, David P. Bennett
Publikováno v:
The Astrophysical Journal. 492:190-199
Mean colors and magnitudes of RR Lyrae stars in 24 fields toward the Galactic bulge from the MACHO database are presented. Accurate mean reddenings are computed for these fields on the basis of the mean colors. The distribution along the line of sigh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::127944fef59e62abe15dc03a54b4ab69
https://doi.org/10.1086/305017
https://doi.org/10.1086/305017