By re-observing the photometric transit, we attempt to determine the transit parameters to high precision, and,
by spectroscopic observations, to estimate the properties of the host star and determine the mass of the transiting object by means of radial - velocity measurements.
Not exact matches
This intriguing fingerprint quickly triggered additional
observations by teams of astronomers worldwide who obtained observing time with additional space observatories including NASA's Chandra X-ray Observatory and NASA's Nuclear
Spectroscopic Telescope Array (NuSTAR).
Measurements of surface chemical composition, either
by direct sampling (as has been done on Earth, the moon, and Mars) or through
spectroscopic observations, can be used to estimate elemental abundances and the degree of chemical differentiation that occurred as the planets condensed from the solar nebula.
The goal of the survey was to characterize planets orbiting low - mass stars, but our IRTF / SpeX and Palomar / TripleSpec
spectroscopic observations revealed that 49 % of our targets were actually giant stars or hotter dwarfs reddened
by interstellar extinction.
However, we also specifically show how high - contrast AO and speckle imaging
observations detect companions at larger separations ($ \ theta \ geq $ 0.02 - 0.05») that are missed
by the
spectroscopic technique, provide additional information for characterizing the companion and its potential contamination (e.g., PA, separation, $ \ Delta $ m), and cover a wider range of primary star effective temperatures.
A team of astronomers, led
by Thomas Beatty of Pennsylvania State University, used the Hubble Space Telescope's Wide Field Camera 3 (WFC3) to perform a
spectroscopic study of the planet's atmosphere in the near - infrared and conducted the
observation as the planet passed behind its parent star.
By using advanced high contrast imagers, it is possible to conduct high resolution spectroscopy on imageable exoplanets, after the star light is first suppress... ▽ More
Spectroscopic observations are extremely important for determining the composition, structure, and surface gravity of exoplanetary atmospheres.
To further investigate, astronomers led
by Nanda Rea of the University of Amsterdam sought help from NASA's Chandra and Nuclear
Spectroscopic Telescope Array, or NuSTAR, to follow up with the
observations.
Potential topics include: (1) Advanced numerical modelling of magnetic flux tubes / loops in the low solar atmosphere (2) Forward modelling of
spectroscopic and narrowband EUV
observations of the low solar atmosphere, (3) Solar Rotational Tomography of EUV and / or coronagraph coronal
observations, (4) Automated detection and prediction of coronal mass ejections, (5) Analysis of solar wind turbulence
observations by in situ spacecraft, (6) Eclipse instrumentation,
observations and data analysis.
Giant transiting exoplanets are easily mimicked
by false positives, so
spectroscopic follow - up
observations are needed to establish the planetary nature of the transit detections, and easily reveal blended multiple stellar systems.
Here, we use
observations from the Large Sky Area Multi-Object Fibre
Spectroscopic Telescope (LAMOST, also called the Guoshoujing Telescope at Xinglong observatory, China) 33 to show that superflare stars are generally characterized
by larger chromospheric emissions than other stars, including the Sun.