FIRST SPACE-BASED MICROLENS PARALLAX MEASUREMENT OF AN ISOLATED STAR:SPITZEROBSERVATIONS OF OGLE-2014-BLG-0939
نویسندگان
چکیده
منابع مشابه
First Space-based Microlens Parallax Measurement of an Isolated Star: Spitzer Observations of Ogle-2014-blg-0939
We present the first space-based microlens parallax measurement of an isolated star. From the striking differences in the lightcurve as seen from Earth and from Spitzer (~1 AU to the west), we infer a projected velocity ~ ṽ 250 km s hel 1, which strongly favors a lens in the Galactic Disk with mass = M M 0.23 0.07 and distance = D 3.1 0.4 kpc L . An ensemble of such measurements drawn fro...
متن کاملOgle-2015-blg-0196: Ground-based Gravitational Microlens Parallax Confirmed by Space-based Observation
In this paper, we present an analysis of the binary gravitational microlensing event OGLE-2015-BLG-0196. The event lasted for almost a year, and the light curve exhibited significant deviations from the lensing model based on the rectilinear lens-source relative motion, enabling us to measure the microlens parallax. The ground-based microlens parallax is confirmed by the data obtained from spac...
متن کاملMoa 2003-blg-37: a Bulge Jerk-parallax Microlens Degeneracy
We analyze the Galactic bulge microlensing event MOA 2003-BLG-37. Although the Einstein timescale is relatively short, tE 1⁄4 43 days, the light curve displays deviations consistent with parallax effects due to the Earth’s accelerated motion. We show that the 2 surface has four distinct local minima that are induced by the ‘‘jerk-parallax’’ degeneracy, with pairs of solutions having projected E...
متن کاملMao : An Ongoing OGLE Parallax
We study the first microlensing event toward the Carina spiral arm discovered by the OGLE collaboration. We demonstrate that this long duration event exhibits strong parallax signatures. Additional information from the parallax effect allows us to determine the lens transverse velocity projected onto the Sun-source line to be ∼ 145 km s. We also estimate the optical depth, event rate and durati...
متن کاملFirst microlens mass measurement: PLANET photometry of EROS BLG-2000-5
We analyze PLANET photometric observations of the caustic-crossing binary-lens microlensing event, EROS BLG-2000-5, and find that modeling the observed light curve requires incorporation of the microlens parallax and the binary orbital motion. The projected Einstein radius (r̃E = 3.61±0.11AU) is derived from the measurement of the microlens parallax, and we are also able to infer the angular Ein...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2015
ISSN: 1538-4357
DOI: 10.1088/0004-637x/802/2/76