Stellar pulsation and granulation as noise sources in exoplanet transit spectroscopy in the ARIEL space mission

Subhajit Sarkar; Ioannis Argyriou; Bart Vandenbussche; Andreas Papageorgiou; Enzo Pascale

doi:10.1093/mnras/sty2453

Stellar pulsation and granulation as noise sources in exoplanet transit spectroscopy in the ARIEL space mission

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/sty2453 ◽

2018 ◽

Vol 481 (3) ◽

pp. 2871-2877 ◽

Cited By ~ 4

Author(s):

Subhajit Sarkar ◽

Ioannis Argyriou ◽

Bart Vandenbussche ◽

Andreas Papageorgiou ◽

Enzo Pascale

Keyword(s):

Space Mission ◽

Noise Sources ◽

Stellar Pulsation

Download Full-text

A Model for Estimating the Number of Stars for which Terrestrial Planets can be Detected Using Transits

Symposium - International Astronomical Union ◽

10.1017/s0074180900193039 ◽

2004 ◽

Vol 213 ◽

pp. 85-88 ◽

Cited By ~ 3

Author(s):

David Koch

Keyword(s):

Spectral Type ◽

Space Mission ◽

Terrestrial Planets ◽

Optimum Location ◽

Apparent Brightness ◽

Noise Sources ◽

Luminosity Class

Borucki & Summers (1984) have suggested that extrasolar terrestrial planets can be detected by looking for transits. A discussion is presented of a model used to estimate the number and distance of stars for which planets can be detected as a function of spectral type and luminosity class, apparent brightness, planetary size and orbit, and realistic noise sources that must be considered. A choice for an optimum location of the field to search is described given the realistic constraints of a space mission and maximizing the number of available stars.

Download Full-text

Hardware Prototyping and Validation of a W-ΔDOR Digital Signal Processor

Applied Sciences ◽

10.3390/app9142909 ◽

2019 ◽

Vol 9 (14) ◽

pp. 2909 ◽

Cited By ~ 1

Author(s):

Gian Carlo Cardarilli ◽

Luca Di Nunzio ◽

Rocco Fazzolari ◽

Daniele Giardino ◽

Marco Matta ◽

...

Keyword(s):

Digital Signal Processor ◽

European Space Agency ◽

Digital Signal ◽

Space Mission ◽

Radio Link ◽

Deep Space ◽

Noise Sources ◽

Backward Compatibility ◽

Space Agency ◽

Spacecraft Tracking

Microwave tracking, usually performed by on ground processing of the signals coming from a spacecraft, represents a crucial aspect in every deep-space mission. Various noise sources, including receiver noise, affect these signals, limiting the accuracy of the radiometric measurements obtained from the radio link. There are several methods used for spacecraft tracking, including the Delta-Differential One-Way Ranging ( Δ DOR) technique. In the past years, European Space Agency (ESA) missions relied on a narrowband Δ DOR system for navigation in the cruise phase. To limit the adverse effect of nonlinearities in the receiving chain, an innovative wideband approach to Δ DOR measurements has recently been proposed. This work presents the hardware implementation of a new version of the ESA X/Ka Deep Space Transponder based on the new tracking technique named Wideband Δ DOR (W- Δ DOR). The architecture of the new transponder guarantees backward compatibility with narrowband Δ DOR.

Download Full-text

ArielRad: the Ariel radiometric model

Experimental Astronomy ◽

10.1007/s10686-020-09676-7 ◽

2020 ◽

Vol 50 (2-3) ◽

pp. 303-328 ◽

Cited By ~ 3

Author(s):

Lorenzo V. Mugnai ◽

Enzo Pascale ◽

Billy Edwards ◽

Andreas Papageorgiou ◽

Subhajit Sarkar

Keyword(s):

Space Mission ◽

Noise Model ◽

Stationary Processes ◽

Noise Sources ◽

Photon Statistic ◽

Cosmic Vision ◽

Performance Requirements ◽

Atmospheric Remote Sensing ◽

Large Survey ◽

Primary Mission

Abstract ArielRad, the Ariel radiometric model, is a simulator developed to address the challenges in optimising the space mission science payload and to demonstrate its compliance with the performance requirements. Ariel, the Atmospheric Remote-Sensing Infrared Exoplanet Large-survey, has been selected by ESA as the M4 mission in the Cosmic Vision programme and, during its 4 years primary operation, will provide the first unbiased spectroscopic survey of a large and diverse sample of transiting exoplanet atmospheres. To allow for an accurate study of the mission, ArielRad uses a physically motivated noise model to estimate contributions arising from stationary processes, and includes margins for correlated and time-dependent noise sources. We show that the measurement uncertainties are dominated by the photon statistic, and that an observing programme with about 1000 exoplanetary targets can be completed during the primary mission lifetime.

Download Full-text