| Autor: |
Rattenbury, N. J., Abe, F., Bennett, D. P., Bond, I. A., Calitz, J. J., Claret, A., Cook, K. H., Furuta, Y., Gal-Yam, A., Glicenstein, J.-F., Hearnshaw, J. B., Hauschildt, P. H., Kilmartin, P. M., Kurata, Y., Masuda, K., Maoz, D., Matsubara, Y., Meintjes, P. J., Moniez, M., Muraki, Y., Noda, S., Ofek, E. O., Okajima, K., Philpott, L., Rhie, S. H., Sako, T., Sullivan, D. J., Sumi, T., Terndrup, D. M., Tristram, P. J., Wood, J., Yanagisawa, T., Yock, P. C. M., Rattenbury, N. J., Abe, F., Bennett, D. P., Bond, I. A., Calitz, J. J., Claret, A., Cook, K. H., Furuta, Y., Gal-Yam, A., Glicenstein, J.-F., Hearnshaw, J. B., Hauschildt, P. H., Kilmartin, P. M., Kurata, Y., Masuda, K., Maoz, D., Matsubara, Y., Meintjes, P. J., Moniez, M., Muraki, Y., Noda, S., Ofek, E. O., Okajima, K., Philpott, L., Rhie, S. H., Sako, T., Sullivan, D. J., Sumi, T., Terndrup, D. M., Tristram, P. J., Wood, J., Yanagisawa, T., Yock, P. C. M. |
| Zdroj: |
Astronomy and Astrophysics; August 2005, Vol. 439 Issue: 2 p645-650, 6p |
| Abstrakt: |
We report a measurement of the shape of the source star in microlensing event MOA 2002-BLG-33. The lens for this event was a close binary whose centre-of-mass passed almost directly in front of the source star. At this time, the source star was closely bounded on all sides by a caustic of the lens. This allowed the oblateness of the source star to be constrained. We found that $a/b = 1.02^{+0.04}_{-0.02}$where aand bare its semi-major and semi-minor axes respectively. The angular resolution of this measurement is approximately 0.04 $\mu\rm{arcsec}$. We also report HST images of the event that confirm a previous identification of the source star as an F8-G2 turn-off main-sequence star. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
