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The Proper Motion of the Large Magellanic Cloud Using HST
Open accessAbstract
We present a measurement of the systemic proper motion of the Large Magellanic Cloud (LMC) from astrometry with the High Resolution Camera (HRC) of the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope ( HST ). We observed LMC fields centered on 21 background QSOs that were discovered from their optical variability in the MACHO database. The QSOs are distributed homogeneously behind the central few degrees of the LMC. With two epochs of HRC data and a ~2 yr baseline, we determine the proper motion of the LMC to better than 5% accuracy: μ W = -2.03 ± 0.08 mas yr -1 , and μ N = 0.44 ± 0.05 mas yr -1 . This is the most accurate proper-motion measurement for any Milky Way satellite thus far. When combined with H I data from the Magellanic Stream, this should provide new constraints on both the mass distribution of the Galactic halo and models of the Stream.
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Cited by
Besla, G., Kallivayalil, N., Hernquist, L., van der Marel, R. P., Cox, T. J., & Kereš, D. (2012) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2012.20466.x · Cited by 359
Self-citationIs the SMC Bound to the LMC? The Hubble Space Telescope Proper Motion of the SMC
Kallivayalil, N., van der Marel, R. P., & Alcock, C. (2006) · The Astrophysical Journal · doi:10.1086/508014 · Cited by 270
Self-citationSMASHing the LMC: A Tidally Induced Warp in the Outer LMC and a Large-scale Reddening Map
Choi, Y., Nidever, D. L., Olsen, K., Blum, R. D., Besla, G., Zaritsky, D., van der Marel, R. P., Bell, E. F., Gallart, C., Cioni, M.-R. L., et al. (2018) · The Astrophysical Journal · doi:10.3847/1538-4357/aae083 · Cited by 114
Self-citationIdentifying true satellites of the Magellanic Clouds
Sales, L. V., Navarro, J. F., Kallivayalil, N., & Frenk, C. S. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stw2816 · Cited by 101
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Metadata
- Authors
- Kallivayalil, N., van der Marel, R. P., Alcock, C., Axelrod, T., Cook, K. H., Drake, A. J., & Geha, M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2006-02-20
- Volume
- 638
- Issue
- 2
- Pages
- 772-785
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2131264809
- Cited by
- 332
- References
- 0
- FWCI
- 15.43
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Kallivayalil, N., van der Marel, R. P., Alcock, C., Axelrod, T., Cook, K. H., Drake, A. J., & Geha, M. (2006). The Proper Motion of the Large Magellanic Cloud Using HST. The Astrophysical Journal. https://doi.org/10.1086/498972
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