Measuring microlensing parallax via simultaneous observations from Chinese Space Station Telescope and Roman Telescope
arXiv:2111.11002 · doi:10.1088/1674-4527/ac3c44
Abstract
Simultaneous observations from two spatially well-separated telescopes can lead to the measurements of the microlensing parallax parameter, an important quantity toward the determinations of the lens mass. The separation between Earth and Sun-Earth L2 point, AU, is ideal for parallax measurements of short and ultra-short (1\,hr to 10\,days) microlensing events, which are candidates of free-floating planet (FFP) events. In this work, we study the potential of doing so in the context of two proposed space-based missions, the Chinese Space Station Telescope (CSST) in a Leo orbit and the Nancy Grace Roman Space Telescope (\emph{Roman}) at L2. We show that the joint observations of the two can directly measure the microlensing parallax of nearly all FFP events with timescales 10\,days as well as planetary (and stellar binary) events that show caustic crossing features. The potential of using CSST alone in measuring microlensing parallax is also discussed.
arXiv commentaccepted to Research in Astronomy and Astrophysics (RAA)
References in corpus (37)
- Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
- Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
- Reddening and Extinction Toward the Galactic Bulge from OGLE-III: The Inner Milky Way's Rv ~ 2.5 Extinction Curve
- Unbound or Distant Planetary Mass Population Detected by Gravitational Microlensing
- OGLE-2003-BLG-262: Finite-Source Effects from a Point-Mass Lens
- Frequency of Solar-Like Systems and of Ice and Gas Giants Beyond the Snow Line from High-Magnification Microlensing Events in 2005-2008
- No large population of unbound or wide-orbit Jupiter-mass planets
- Cosmology from the Chinese Space Station Optical Survey (CSS-OS)
- The Exoplanet Mass-Ratio Function from the MOA-II Survey: Discovery of a Break and Likely Peak at a Neptune Mass
- Predictions of the WFIRST Microlensing Survey I: Bound Planet Detection Rates
- A Natural Formalism for Microlensing
- Exoplanet Statistics and Theoretical Implications
- The Mass Spectrum Of Machos From Parallax Measurements
- First Space-Based Microlens Parallax Measurement: Spitzer Observations of OGLE-2005-SMC-001
- Characterization of Gravitational Microlensing Planetary Host Stars
- Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey II: Free-Floating Planet Detection Rates
- ExELS: an exoplanet legacy science proposal for the ESA Euclid mission I. Cold exoplanets
- Theory of Pixel Lensing
- Toward a Galactic Distribution of Planets. I. Methodology & Planet Sensitivities of the 2015 High-Cadence Spitzer Microlens Sample
- A large accretion disk of extreme eccentricity in the TDE ASASSN-14li
- Predictions for Microlensing Planetary Events from Core Accretion Theory
- Two new free-floating or wide-orbit planets from microlensing
- Gravitational Microlensing: A Tool for Detecting and Characterizing Free-Floating Planets
- Spitzer as Microlens Parallax Satellite: Mass and Distance Measurements of Binary Lens System OGLE-2014-BLG-1050L
- Spitzer Microlens Measurement of a Massive Remnant in a Well-Separated Binary
- Resolving the Microlens Mass Degeneracy for Earth-Mass Planets
- OGLE-2015-BLG-1482L: the first isolated low-mass microlens in the Galactic bulge
- WFIRST Planet Masses from Microlens Parallax
- Masses for Free-Floating Planets and Dwarf Planets
- An Isolated Microlens Observed from K2, Spitzer and Earth
- WFIRST and EUCLID: enabling the microlensing parallax measurement from space
- Microlens Parallaxes of Binary Lenses Measured from a Satellite
- MACHO Mass Determination Based on Space Telescope Observation
- Microlensing planet detection via geosynchronous and low Earth orbit satellites
- Probability of simultaneous parallax detection for free-floating planet microlensing events near Galactic Centre
- The analysis of effective galaxies number count for Chinese Space Station Optical Survey(CSS-OS) by image simulation
- Unique Science from a Coordinated LSST-WFIRST Survey of the Galactic Bulge
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