%0 Generic %1 batista2013moa2011blg293lb %A Batista, V. %A Beaulieu, J. P. %A Gould, A. %A Bennett, D. P. %A Yee, J. C %A Fukui, A. %A Gaudi, B. S. %A Sumi, T. %A Udalski, A. %D 2013 %K 2013 habitability microlensing planets %T MOA-2011-BLG-293Lb: First Microlensing Planet possibly in the Habitable Zone %U http://arxiv.org/abs/1310.3706 %X We used Keck adaptive optics observations to identify the first planet discovered by microlensing to lie in or near the habitable zone, i.e., at projected separation $r_\perp=1.10.1\,$AU from its $M_L=0.86\pm 0.06\,M_ødot$ host, being the highest microlensing mass definitely identified. The planet has a mass $m_p = 4.80.3\,M_Jup$, and could in principle have habitable moons. This is also the first planet to be identified as being in the Galactic bulge with good confidence: $D_L=7.70.44$ kpc. The planet/host masses and distance were previously not known, but only estimated using Bayesian priors based on a Galactic model (Yee et al. 2012). These estimates had suggested that the planet might be a super-Jupiter orbiting an M dwarf, a very rare class of planets. We obtained high-resolution $JHK$ images using Keck adaptive optics to detect the lens and so test this hypothesis. We clearly detect light from a G dwarf at the position of the event, and exclude all interpretations other than that this is the lens with high confidence (95%), using a new astrometric technique. The calibrated magnitude of the planet host star is $H_L=19.160.13$. We infer the following probabilities for the three possible orbital configurations of the gas giant planet: 53% to be in the habitable zone, 35% to be near the habitable zone, and 12% to be beyond the snow line, depending on the atmospherical conditions.

@misc{batista2013moa2011blg293lb, abstract = {We used Keck adaptive optics observations to identify the first planet discovered by microlensing to lie in or near the habitable zone, i.e., at projected separation $r_\perp=1.1\pm 0.1\,$AU from its $M_{L}=0.86\pm 0.06\,M_\odot$ host, being the highest microlensing mass definitely identified. The planet has a mass $m_p = 4.8\pm 0.3\,M_{\rm Jup}$, and could in principle have habitable moons. This is also the first planet to be identified as being in the Galactic bulge with good confidence: $D_L=7.7\pm 0.44$ kpc. The planet/host masses and distance were previously not known, but only estimated using Bayesian priors based on a Galactic model (Yee et al. 2012). These estimates had suggested that the planet might be a super-Jupiter orbiting an M dwarf, a very rare class of planets. We obtained high-resolution $JHK$ images using Keck adaptive optics to detect the lens and so test this hypothesis. We clearly detect light from a G dwarf at the position of the event, and exclude all interpretations other than that this is the lens with high confidence (95%), using a new astrometric technique. The calibrated magnitude of the planet host star is $H_{L}=19.16\pm 0.13$. We infer the following probabilities for the three possible orbital configurations of the gas giant planet: 53% to be in the habitable zone, 35% to be near the habitable zone, and 12% to be beyond the snow line, depending on the atmospherical conditions.}, added-at = {2013-10-15T10:34:44.000+0200}, author = {Batista, V. and Beaulieu, J. P. and Gould, A. and Bennett, D. P. and Yee, J. C and Fukui, A. and Gaudi, B. S. and Sumi, T. and Udalski, A.}, biburl = {https://www.bibsonomy.org/bibtex/2a4aff367317647deffd620a6f01034b4/danielcarrera}, description = {[1310.3706] MOA-2011-BLG-293Lb: First Microlensing Planet possibly in the Habitable Zone}, interhash = {d0437ae51a19c7d469f284d7399b03a0}, intrahash = {a4aff367317647deffd620a6f01034b4}, keywords = {2013 habitability microlensing planets}, note = {cite arxiv:1310.3706Comment: 20 pages, 4 figures}, timestamp = {2013-10-15T10:34:44.000+0200}, title = {MOA-2011-BLG-293Lb: First Microlensing Planet possibly in the Habitable Zone}, url = {http://arxiv.org/abs/1310.3706}, year = 2013 }