SIMBAD references

2015ApJ...799..237U - Astrophys. J., 799, 237 (2015/February-1)

Spitzer as a microlens parallax satellite: mass measurement for the OGLE-2014-BLG-0124L planet and its host star.

UDALSKI A., YEE J.C., GOULD A., CAREY S., ZHU W., SKOWRON J., KOZLOWSKI S., POLESKI R., PIETRUKOWICZ P., PIETRZYNSKI G., SZYMANSKI M.K., MROZ P., SOSZYNSKI I., ULACZYK K., WYRZYKOWSKI L., HAN C., CALCHI NOVATI S. and POGGE R.W.

Abstract (from CDS):

We combine Spitzer and ground-based observations to measure the microlens parallax vector πE, and thus the mass and distance of OGLE-2014-BLG-0124L, making it the first microlensing planetary system with a space-based parallax measurement. The planet and star have masses of m ∼ 0.5 Mjup and M ∼ 0.7 Mand are separated by a∼ 3.1 AU in projection. The main source of uncertainty in all of these numbers (approximately 30%, 30%, and 20%) is the relatively poor measurement of the Einstein radius θE, rather than uncertainty in πE, which is measured with 2.5% precision. This compares to 22% based on OGLE data alone, implying that the Spitzer data provide not only a substantial improvement in the precision of the πEmeasurement, but also the first independent test of a ground-based πE measurement.

Abstract Copyright:

Journal keyword(s): gravitational lensing: micro - planetary systems

Simbad objects: 8

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2021.05.11-10:31:41

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