Twinkle: Update on the international, collaborative exoplanet survey

2021 ◽  
Author(s):  
Billy Edwards ◽  
Marcell Tessenyi ◽  
Ian Stotesbury ◽  
Richard Archer ◽  
Max Joshua ◽  
...  
Keyword(s):  
Solar System ◽  
Space Mission ◽  
Light Curves ◽  
Orbital Parameters ◽  
Short Period ◽  
Wide Range ◽  
Scientific Potential ◽  
Working Groups ◽  
Science Interests ◽  
Spectroscopic Characterisation

<div>The Twinkle Space Mission is a space-based observatory that has been conceived to measure the atmospheric composition of exoplanets, stars and solar system objects. Twinkle’s collaborative multi-year global survey programmes will deliver visible and infrared spectroscopy of thousands of objects within and beyond our solar system, enabling participating scientists to produce world-leading research in planetary and exoplanetary science. Twinkle’s growing group of international Founding Members have now started shaping the survey science programme within focused Science Teams and Working Groups and will soon be delivering their first papers.</div> <div> </div> <div>Twinkle will have the capability to provide simultaneous broadband spectroscopic characterisation (0.5 - 4.5µm) of the atmospheres of several hundred bright exoplanets, covering a wide range of planetary types. It will also be capable of providing phase curves for hot, short-period planets around bright stars targets and of providing ultra-precise photometric light curves to accurately constrain orbital parameters, including ephemerides and TTVs/TDVs present in multi-planet systems.<br /><br />I will present an overview of Twinkle’s mission status and discuss some example exoplanet surveys to highlight the broad range of targets the mission could observe, demonstrating the scientific potential of the spacecraft. I will also report on the work of the Twinkle exoplanet Science Team, showcasing their science interests and the studies into Twinkle’s capabilities that they have conducted since joining the mission.</div>

Twinkle: a low-Earth orbit, visible and infrared observatory for exoplanet and solar system spectroscopy

2020 ◽  
Author(s):  
Billy Edwards ◽  
Marcell Tessenyi ◽  
Giovanna Tinetti ◽  
Giorgio Savini ◽  
Ian Stotesbury ◽  
...  
Keyword(s):  
Solar System ◽  
Thermal Environment ◽  
Space Mission ◽  
Low Earth Orbit ◽  
Atmospheric Composition ◽  
Orbital Parameters ◽  
Short Period ◽  
Wide Range ◽  
Solar System Objects ◽  
Scientific Potential

<p>The Twinkle Space Mission is a space-based observatory that has been conceived to measure the atmospheric composition of exoplanets, stars and solar system objects. The satellite is based on a high-heritage platform and will carry a 0.45 m telescope with a visible and infrared spectrograph providing simultaneous wavelength coverage from 0.5 - 4.5 μm. The spacecraft will be launched into a Sun-synchronous low-Earth polar orbit and will operate in this highly stable thermal environment for a baseline lifetime of seven years.</p> <p>Twinkle will have the capability to provide high-quality infrared spectroscopic characterisation of the atmospheres of hundreds of bright exoplanets, covering a wide range of planetary types. It will also be capable of providing phase curves for hot, short-period planets around bright stars targets and of providing ultra-precise photometric light curves to accurately constrain orbital parameters, including ephemerides and TTVs/TDVs present in multi-planet systems.</p> <p>Twinkle is available for researchers around the globe in two ways:</p> <p>1) joining its collaborative multi-year survey programme, which will observe hundreds of exoplanets and solar system objects; and</p> <p>2) accessing dedicated telescope time on the spacecraft, which they can schedule for any combination of science cases.</p> <p>I will present an overview of Twinkle’s capabilities and discuss some example exoplanet surveys to highlight the broad range of targets the mission could observe, demonstrating the huge scientific potential of the spacecraft.</p>

Twinkle: a low-Earth orbit, visible and infrared observatory for exoplanet and solar system spectroscopy

2020 ◽  
Author(s):  
Billy Edwards ◽  
Marcell Tessenyi ◽  
Giorgio Savini ◽  
Giovanna Tinetti ◽  
Ian Stotesbury ◽  
...  
Keyword(s):  
Solar System ◽  
Near Infrared ◽  
Surface Composition ◽  
Thermal Environment ◽  
Space Mission ◽  
Low Earth Orbit ◽  
Atmospheric Composition ◽  
Solar System Objects ◽  
Scientific Potential ◽  
Asteroids And Comets

<p>The Twinkle Space Mission is a space-based observatory that has been conceived to measure the atmospheric composition of exoplanets, stars and solar system objects. The satellite is based on a high-heritage platform and will carry a 0.45 m telescope with a visible and infrared spectrograph providing simultaneous wavelength coverage from 0.5 - 4.5 μm. The spacecraft will be launched into a Sun-synchronous low-Earth polar orbit and will operate in this highly stable thermal environment for a baseline lifetime of seven years.</p> <p>Twinkle’s rapid pointing and non-sidereal tracking capabilities will enable the observation of a diverse array of Solar System objects, including asteroids and comets. Twinkle aims to provide a visible and near-infrared spectroscopic population study of asteroids and comets to study their surface composition and monitor activity. Its wavelength coverage and position above the atmosphere will make it particularly well-suited for studying hydration features that are obscured by telluric lines from the ground as well as searching for other spectral signatures such as organics, silicates and CO<sub>2</sub>.</p> <p>Twinkle is available for researchers around the globe in two ways:</p> <p>1) joining its collaborative multi-year survey programme, which will observe hundreds of exoplanets and solar system objects; and</p> <p>2) accessing dedicated telescope time on the spacecraft, which they can schedule for any combination of science cases.</p> <p>I will present an overview of Twinkle’s capabilities and discuss the broad range of targets the mission could observe, demonstrating the huge scientific potential of the spacecraft.</p>

scholarly journals Detection of small-size planetary candidates with CoRoT data

2010 ◽  
Vol 6 (S276) ◽  
pp. 523-524
Author(s):  
Aldo S. Bonomo ◽  
Pierre-Yves Chabaud ◽  
Magali Deleuil ◽  
Claire Moutou ◽  
Pascal Bordé
Keyword(s):  
Time Scale ◽  
Detection Threshold ◽  
Space Mission ◽  
Light Curves ◽  
Short Time Scale ◽  
Blind Test ◽  
Short Period ◽  
Short Time ◽  
Rocky Planets

AbstractWith the discovery of CoRoT-7b, the first transiting super-Earth, the CoRoT space mission has shown the capability to detect short-period rocky planets around solar-like stars. By performing a blind test with real CoRoT light curves, we want to establish the detection threshold of small-size planets in CoRoT data. We investigate the main obstacles to the detection of transiting super-Earths in CoRoT data, notably the presence of short-time scale variability and hot pixels.

Twinkle: a low-Earth orbit, visible and infrared observatory for exoplanet and solar system spectroscopy

2021 ◽  
Author(s):  
Billy Edwards ◽  
Marcell Tessenyi ◽  
Ian Stotesbury ◽  
Richard Archer ◽  
Ben Wilcock ◽  
...  
Keyword(s):  
Solar System ◽  
Near Infrared ◽  
Surface Composition ◽  
Space Mission ◽  
Low Earth Orbit ◽  
Earth Orbit ◽  
Spectral Signatures ◽  
Solar System Objects ◽  
Scientific Potential ◽  
Asteroids And Comets

<div>The Twinkle Space Mission is a space-based observatory that has been conceived to measure the atmospheric composition of exoplanets, stars and solar system objects. Twinkle’s collaborative multi-year global survey programmes will deliver visible and infrared spectroscopy of thousands of objects within and beyond our solar system, enabling participating scientists to produce world-leading research in planetary and exoplanetary science.</div> <div> </div> <p>Twinkle’s rapid pointing and non-sidereal tracking capabilities will enable the observation of a diverse array of Solar System objects, including asteroids and comets. Twinkle aims to provide a visible and near-infrared (0.5-4.5 micron) spectroscopic population study of asteroids and comets to study their surface composition and monitor activity. Its wavelength coverage and position above the atmosphere will make it particularly well-suited for studying hydration features that are obscured by telluric lines from the ground as well as searching for other spectral signatures such as organics, silicates and CO<sub>2</sub>.</p> <p>I will present an overview of Twinkle’s capabilities and discuss the broad range of targets the mission could observe, including the measurements it will take to support <span class="size">JAXA's Martian Moons eXploration (MMX) mission, demonstrating the broad scientific potential of the spacecraft.</span></p>

scholarly journals Division II: Sun and Heliosphere

2005 ◽  
Vol 1 (T26A) ◽  
pp. 69-74
Author(s):  
David F. Webb ◽  
Donald B. Melrose ◽  
Arnold O. Benz ◽  
Thomas J. Bogdan ◽  
Jean-Louis Bougeret ◽  
...  
Keyword(s):  
Solar System ◽  
The Sun ◽  
The Earth ◽  
Scientific Organizations ◽  
Wide Range ◽  
Working Groups ◽  
Division Ii ◽  
New Procedures

AbstractDivision II of the IAU provides a forum for astronomers studying a wide range of phenomena related to the structure, radiation and activity of the Sun, and its interaction with the Earth and the rest of the solar system. Division II encompasses three Commissions, 10, 12 and 49, and four working groups. During the last triennia the activities of the division involved some reorganization of the division and its working groups, developing new procedures for election of division and commission officers, promoting annual meetings from within the division and evaluating all the proposed meetings, evaluating the division's representatives for the IAU to international scientific organizations, and participating in general IAU business.

scholarly journals DIVISION II: SUN AND HELIOSPHERE

2008 ◽  
Vol 4 (T27A) ◽  
pp. 73-78
Author(s):  
Donald B. Melrose ◽  
Valentin Martínez Pillet ◽  
David F. Webb ◽  
Lidia van Driel-Gesztelyi ◽  
Jean-Louis Bougeret ◽  
...  
Keyword(s):  
Solar System ◽  
The Sun ◽  
The Earth ◽  
Wide Range ◽  
Working Groups ◽  
Division Ii

Division II of the IAU provides a forum for astronomers and astrophysicists studying a wide range of phenomena related to the structure, radiation and activity of the Sun, and its interaction with the Earth and the rest of the solar system. Division II encompasses three Commissions, 10, 12 and 49, and four Working Groups.

scholarly journals A catalogue of over 10 million variable source candidates in ZTF Data Release 1

2020 ◽  
Vol 499 (4) ◽  
pp. 5782-5790
Author(s):  
Eran O Ofek ◽  
Maayane Soumagnac ◽  
Guy Nir ◽  
Avishay Gal-Yam ◽  
Peter Nugent ◽  
...  
Keyword(s):  
Light Curve ◽  
Data Base ◽  
Light Curves ◽  
Variable Source ◽  
Dwarf Nova ◽  
Short Period ◽  
Wide Range ◽  
Data Release ◽  
Astrophysical Phenomena

ABSTRACT Variable sources probe a wide range of astrophysical phenomena. We present a catalogue of over 10 million variable source candidates found in Data Release 1 (DR1) of the Zwicky Transient Facility (ZTF). We perform a periodicity search up to a frequency of 160 d−1, and we classify the light curves into erratic and smooth variables. We also present variability indicators and the results of a periodicity search, up to a frequency of 5 d−1, for about 1 billion sources in the ZTF-DR1 light curve data base. We present several new short-period (<90 min) candidates, and about 60 new dwarf nova candidates, including two candidate eclipsing systems. Both the 10 million variables catalogue and ∼1 billion source catalogue are available online in catsHTM format.

The Origin of the Moon and its Relationship to the Origin of the Solar System

1962 ◽  
Vol 14 ◽  
pp. 133-148 ◽  
Author(s):  
Harold C. Urey
Keyword(s):  
Solar System ◽  
The Moon ◽  
The Past ◽  
The Earth ◽  
Short Period ◽  
Origin Of The Moon

During the last 10 years, the writer has presented evidence indicating that the Moon was captured by the Earth and that the large collisions with its surface occurred within a surprisingly short period of time. These observations have been a continuous preoccupation during the past years and some explanation that seemed physically possible and reasonably probable has been sought.

Quasi-Periodic Oscillations in Dwarf Novae

1979 ◽  
Vol 46 ◽  
pp. 77-88
Author(s):  
Edward L. Robinson
Keyword(s):  
Binary Systems ◽  
Outer Edge ◽  
Light Curves ◽  
Close Binary ◽  
Bright Spot ◽  
Dwarf Novae ◽  
Periodic Oscillations ◽  
High Frequencies ◽  
Short Period ◽  
Typical Time

Three distinct kinds of rapid variations have been detected in the light curves of dwarf novae: rapid flickering, short period coherent oscillations, and quasi-periodic oscillations. The rapid flickering is seen in the light curves of most, if not all, dwarf novae, and is especially apparent during minimum light between eruptions. The flickering has a typical time scale of a few minutes or less and a typical amplitude of about .1 mag. The flickering is completely random and unpredictable; the power spectrum of flickering shows only a slow decrease from low to high frequencies. The observations of U Gem by Warner and Nather (1971) showed conclusively that most of the flickering is produced by variations in the luminosity of the bright spot near the outer edge of the accretion disk around the white dwarf in these close binary systems.

scholarly journals SuperWASP variable stars: classifying light curves using citizen science

2021 ◽  
Vol 502 (1) ◽  
pp. 1299-1311
Author(s):  
Heidi B Thiemann ◽  
Andrew J Norton ◽  
Hugh J Dickinson ◽  
Adam McMaster ◽  
Ulrich C Kolb
Keyword(s):  
Variable Stars ◽  
Eclipsing Binaries ◽  
Light Curves ◽  
Data Set ◽  
Resultant Data ◽  
Sky Survey ◽  
Short Period ◽  
Contact Binaries ◽  
Analysis Of Results

ABSTRACT We present the first analysis of results from the SuperWASP variable stars Zooniverse project, which is aiming to classify 1.6 million phase-folded light curves of candidate stellar variables observed by the SuperWASP all sky survey with periods detected in the SuperWASP periodicity catalogue. The resultant data set currently contains >1 million classifications corresponding to >500 000 object–period combinations, provided by citizen–scientist volunteers. Volunteer-classified light curves have ∼89 per cent accuracy for detached and semidetached eclipsing binaries, but only ∼9 per cent accuracy for rotationally modulated variables, based on known objects. We demonstrate that this Zooniverse project will be valuable for both population studies of individual variable types and the identification of stellar variables for follow-up. We present preliminary findings on various unique and extreme variables in this analysis, including long-period contact binaries and binaries near the short-period cut-off, and we identify 301 previously unknown binaries and pulsators. We are now in the process of developing a web portal to enable other researchers to access the outputs of the SuperWASP variable stars project.

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