SIMBAD references

2022MNRAS.514.5952Z - Mon. Not. R. Astron. Soc., 514, 5952-5968 (2022/August-3)

OGLE-2018-BLG-0799Lb: a q ∼ 2.7 x 10^–3 planet with Spitzer parallax.

ZANG W., SHVARTZVALD Y., UDALSKI A., YEE J.C., LEE C.-U., SUMI T., ZHANG X., YANG H., MAO S., NOVATI S.C., GOULD A., ZHU W., BEICHMAN C.A., BRYDEN G., CAREY S., GAUDI B.S., HENDERSON C.B., MROZ P., SKOWRON J., POLESKI R., SZYMANSKI M., SOSZYNSKI I., PIETRUKOWICZ P., KOZ S., ULACZYK K., RYBICKI K.A., IWANEK P., WRONA M., ALBROW M.D., CHUNG S.-J., HAN C., HWANG K.-H., JUNG Y.K., RYU Y.-H., SHIN I.-G., CHA S.-M., KIM D.-J., KIM H.-W., KIM S.-L., LEE D.-J., LEE Y., PARK B.-G., POGGE R.W., BOND I.A., ABE F., BARRY R., BENNETT D.P., BHATTACHARYA A., DONACHIE M., FUJII H., FUKUI A., HIRAO Y., ITOW Y., KIRIKAWA R., KONDO I., KOSHIMOTO N., LI M.C.A., MATSUBARA Y., MURAKI Y., MIYAZAKI S., RANC C., RATTENBURY N.J., SATOH Y., SHOJI H., SUZUKI D., TANAKA Y., TRISTRAM P.J., YAMAWAKI T., YONEHARA A., BACHELET E., HUNDERTMARK M.P.G., JAIMES R.F., MAOZ D., PENNY M.T., STREET R.A. and TSAPRAS Y.

Abstract (from CDS):

We report the discovery and analysis of a planet in the microlensing event OGLE-2018-BLG-0799. The planetary signal was observed by several ground-based telescopes, and the planet-host mass ratio is q = (2.65 ± 0.16) x 10^–3. The ground-based observations yield a constraint on the angular Einstein radius θ_E, and the microlensing parallax vector π_E, is strongly constrained by the Spitzer data. However, the 2019 Spitzer baseline data reveal systematics in the Spitzer photometry, so there is ambiguity in the magnitude of the parallax. In our preferred interpretation, a full Bayesian analysis using a Galactic model indicates that the planetary system is composed of an M_planet = 0.26_–0.11^+0.22 M_J planet orbiting an M_host = 0.093_–0.038^+0.082 M_☉, at a distance of D_L = 3.71_–1.70^+3.24 kpc. An alternate interpretation of the data shifts the localization of the minima along the arc-shaped microlens parallax constraints. This, in turn, yields a more massive host with median mass of 0.13 M_☉ at a distance of 6.3 kpc. This analysis demonstrates the robustness of the osculating circles formalism, but shows that further investigation is needed to assess how systematics affect the specific localization of the microlens parallax vector and, consequently, the inferred physical parameters.

Journal keyword(s): gravitational lensing: micro - planets and satellites: detection

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 20

Full paper

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