THE SPITZER MICROLENSING PROGRAM AS A PROBE for GLOBULAR CLUSTER PLANETS: ANALYSIS of OGLE-2015-BLG-0448

Poleski, Radosław; Zhu, Wei; Christie, Grant W.; Udalski, Andrzej; Gould, Andrew; Bachelet, Etienne; Skottfelt, Jesper; CALCHI NOVATI, Sebastiano; Szymański, M. K.; Soszyński, I.; Pietrzyński, G.; Wyrzykowski, Ł.; Ulaczyk, K.; Pietrukowicz, P.; Kozłowski, Szymon; Skowron, J.; Mróz, P.; Pawlak, M.; Beichman, C.; Bryden, G.; Carey, S.; Fausnaugh, M.; Gaudi, B. S.; Henderson, C. B.; Pogge, R. W.; Shvartzvald, Y.; Wibking, B.; Yee, J. C.; Beatty, T. G.; Eastman, J. D.; Drummond, J.; Friedmann, M.; Henderson, M.; Johnson, J. A.; Kaspi, S.; Maoz, D.; Mccormick, J.; Mccrady, N.; Natusch, T.; Ngan, H.; Porritt, I.; Relles, H. M.; Sliski, D. H.; Tan, T. G.; Wittenmyer, R. A.; Wright, J. T.; Street, R. A.; Tsapras, Y.; Bramich, D. M.; Horne, K.; Snodgrass, C.; Steele, I. A.; Menzies, J.; Jaimes, R. Figuera; Wambsganss, J.; Schmidt, R.; Cassan, A.; Ranc, C.; Mao, S.; Bozza, Valerio; Dominik, M.; Hundertmark, M. P. G.; Jørgensen, U. G.; Andersen, M. I.; Burgdorf, M. J.; Ciceri, S.; D'Ago, G.; Evans, D. F.; S. H., Gu; Hinse, T. C.; Kains, N.; Kerins, E.; Korhonen, H.; Kuffmeier, M.; Mancini, L.; Popovas, A.; Rabus, M.; Rahvar, S.; Rasmussen, R. T.; Scarpetta, Gaetano; Southworth, J.; Surdej, J.; Unda Sanzana, E.; Verma, P.; Essen, C. Von; Wang, Y. B.; Wertz, O.

doi:10.3847/0004-637X/823/1/63

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The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of the globular cluster NGC 6558. The event had moderate magnification and was intensively observed, hence it had the potential to probe the distribution of planets in globular clusters. We measure the proper motion of NGC 6558 ((μcl (N, E) = +0.36 ± 0.10, +1.42 ± 0.10 mas yr-1) as well as the source and show that the lens is not a cluster member. Even though this particular event does not probe the distribution of planets in globular clusters, other potential cluster lens events can be verified using our methodology. Additionally, we find that microlens parallax measured using Optical Gravitational Lens Experiment (OGLE) photometry is consistent with the value found based on the light curve displacement between the Earth and Spitzer.

Titolo:	THE SPITZER MICROLENSING PROGRAM AS A PROBE for GLOBULAR CLUSTER PLANETS: ANALYSIS of OGLE-2015-BLG-0448
Autori:	Poleski, Radosław Zhu, Wei Christie, Grant W. Udalski, Andrzej Gould, Andrew Bachelet, Etienne Skottfelt, Jesper CALCHI NOVATI, Sebastiano Szymański, M. K. Soszyński, I. Pietrzyński, G. Wyrzykowski, Ł. Ulaczyk, K. Pietrukowicz, P. Kozłowski, Szymon Skowron, J. Mróz, P. Pawlak, M. Beichman, C. Bryden, G. Carey, S. Fausnaugh, M. Gaudi, B. S. Henderson, C. B. Pogge, R. W. Shvartzvald, Y. Wibking, B. Yee, J. C. Beatty, T. G. Eastman, J. D. Drummond, J. Friedmann, M. Henderson, M. Johnson, J. A. Kaspi, S. Maoz, D. Mccormick, J. Mccrady, N. Natusch, T. Ngan, H. Porritt, I. Relles, H. M. Sliski, D. H. Tan, T. G. Wittenmyer, R. A. Wright, J. T. Street, R. A. Tsapras, Y. Bramich, D. M. Horne, K. Snodgrass, C. Steele, I. A. Menzies, J. Jaimes, R. Figuera Wambsganss, J. Schmidt, R. Cassan, A. Ranc, C. Mao, S. BOZZA, Valerio Dominik, M. Hundertmark, M. P. G. Jørgensen, U. G. Andersen, M. I. Burgdorf, M. J. Ciceri, S. D'Ago, G. Evans, D. F. Gu, S. H. Hinse, T. C. Kains, N. Kerins, E. Korhonen, H. Kuffmeier, M. Mancini, L. Popovas, A. Rabus, M. Rahvar, S. Rasmussen, R. T. SCARPETTA, Gaetano Southworth, J. Surdej, J. Unda Sanzana, E. Verma, P. Essen, C. Von Wang, Y. B. Wertz, O. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2016
Rivista:	THE ASTROPHYSICAL JOURNAL
Handle:	http://hdl.handle.net/11386/4668030
Appare nelle tipologie:	1.1.1 Articolo su rivista con DOI

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