scholarly journals The HoSTS Project: A Homogeneous Study of Transiting Systems

2013 ◽  
Vol 8 (S299) ◽  
pp. 285-286
Author(s):  
Yilen Gómez Maqueo Chew ◽  
Francesca Faedi ◽  
Leslie Hebb ◽  
Don Pollacco ◽  
Keivan Stassun ◽  
...  
Keyword(s):  
Pilot Study ◽  
Physical Properties ◽  
Planetary Systems ◽  
Planetary Formation ◽  
Empirical Correlations ◽  
Large Sample ◽  
Fundamental Properties ◽  
Homogeneous Set ◽  
Formation And Evolution ◽  
Host Stars

AbstractThe Homogeneous Study of Transiting Systems (HoSTS) will derive a consistent and homogeneous set of both the stellar and planetary physical properties for a large sample of bright transiting planetary systems with confirmed planetary masses and measured radii. Our resulting catalogs of the fundamental properties of these bright planets and their host stars will enable us to explore empirical correlations that will lead to a better understanding of planetary formation and evolution. We present our pilot study of the planet-hosting star WASP-13, and the framework of our project which will allow for the identification of true relationships among the physical properties of the systems from any systematics.

scholarly journals Extra-solar Planets: Clues to Planetary Formation

2004 ◽  
Vol 219 ◽  
pp. 311-322 ◽  
Author(s):  
Nuno C. Santos ◽  
Michel Mayor ◽  
Dominique Naef ◽  
Francesco Pepe ◽  
Didier Queloz ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Radial Velocity ◽  
Crucial Role ◽  
Giant Planet ◽  
Planetary Systems ◽  
Current Status ◽  
Planetary Formation ◽  
Orbital Elements ◽  
Host Stars

Radial velocity surveys have revealed up to now about 115 extra-solar planets, among which a few multi-planetary systems. The discovered planets present a wide variety of orbital elements and masses, which are raising many problems and questions regarding the processes involved in their formation. The statistical analysis of the distributions of orbital elements, planetary masses, and relations between these, is however already giving some strong constraints on the formation of the planetary systems. Furthermore, the study of the planet host stars has revealed the crucial role of the stellar metallicity on the giant planet formation. In this paper we will review the current status of the research on this subject.

scholarly journals Asteroseismology of exoplanet host stars

2015 ◽  
Vol 11 (A29B) ◽  
pp. 620-627
Author(s):  
Daniel Huber
Keyword(s):  
Radial Velocity ◽  
Planetary Systems ◽  
Precise Determination ◽  
Spin Orbit ◽  
Velocity Measurements ◽  
Fundamental Properties ◽  
Future Space ◽  
Host Stars

AbstractAsteroseismology is among the most powerful observational tools to determine fundamental properties of stars. Space-based photometry has recently enabled the systematic detection of oscillations in exoplanet host stars, allowing a combination of asteroseismology with transit and radial-velocity measurements to characterize planetary systems. In this contribution I will review the key synergies between asteroseismology and exoplanet science such as the precise determination of radii and ages of exoplanet host stars, as well as applications of asteroseismology to measure spin-orbit inclinations in multiplanet systems and orbital eccentricities of small planets. Finally I will give a brief outlook on asteroseismic studies of exoplanet hosts with current and future space-based missions such as K2 and TESS.

How the Explanations of Natural Laws Make Some Reducible Physical Properties Natural and Explanatorily Powerful

2018 ◽  
Author(s):  
Marc Lange
Keyword(s):  
Physical Properties ◽  
Scientific Practice ◽  
Center Of Mass ◽  
Natural Laws ◽  
Fundamental Properties

Some philosophers regard no reducible physical properties as perfectly natural. However, in scientific practice, some but not other reducible physical properties (such as the property of having a given center of mass) denote genuine, explanatorily potent respects in which various systems are alike. What distinguishes these natural reducible physical properties from arbitrary algebraic combinations of more fundamental properties? Some philosophers treat naturalness as a metaphysical primitive. However, this chapter I suggests that it is not—at least, not as far as the naturalness of reducible physical properties is concerned. Roughly speaking, it is argued here that a reducible physical property’s naturalness is grounded in its role in the explanation of laws.

scholarly journals The Complete Census of 70 μm–Bright Debris Disks within “The Formation and Evolution of Planetary Systems”SpitzerLegacy Survey of Sun‐like Stars

2008 ◽  
Vol 677 (1) ◽  
pp. 630-656 ◽  
Author(s):  
Lynne A. Hillenbrand ◽  
John M. Carpenter ◽  
Jinyoung Serena Kim ◽  
Michael R. Meyer ◽  
Dana E. Backman ◽  
...  
Keyword(s):  
Planetary Systems ◽  
Debris Disks ◽  
Formation And Evolution

scholarly journals Physical properties of the HAT-P-23 and WASP-48 planetary systems from multi-colour photometry

2015 ◽  
Vol 577 ◽  
pp. A54 ◽  
Author(s):  
S. Ciceri ◽  
L. Mancini ◽  
J. Southworth ◽  
I. Bruni ◽  
N. Nikolov ◽  
...  
Keyword(s):  
Physical Properties ◽  
Planetary Systems

How many suns are in the sky? Multiplicity surveys of exoplanet host stars

2018 ◽  
Vol 14 (S345) ◽  
pp. 316-317 ◽  
Author(s):  
M. Mugrauer ◽  
C. Ginski ◽  
N. Vogt ◽  
R. Neuhäuser ◽  
C. Adam
Keyword(s):  
Milky Way ◽  
Planet Formation ◽  
High Contrast ◽  
Contrast Imaging ◽  
Direct Imaging ◽  
High Contrast Imaging ◽  
Multiple Stars ◽  
First Results ◽  
Formation And Evolution ◽  
Host Stars

AbstractIn order to determine the true impact of stellar multiplicity on the formation and evolution of planets, we initiated direct imaging surveys to search for (sub)stellar companions of exoplanet host stars on close orbits, as their gravitational impact on the planet bearing disk at first and on formed planets afterwards is expected to be maximal. According to theory these are the most challenging environments for planet formation and evolution but might occur quite frequently in the milky way, due to the large number of multiple stars within our galaxy. On this poster we showed results, obtained so far in the course of our AO and Lucky-imaging campaigns of exoplanet host stars, conducted with NACO/ESO-VLT for southern and with AstraLux/CAHA2.2m for northern targets, respectively. In addition, we introduced our new high contrast imaging survey with SPHERE/ESO-VLT to search for close companions of southern exoplanet host stars, and presented some first results.

Ages for large samples of stars - caveats and uncertainties

2017 ◽  
Vol 13 (S334) ◽  
pp. 147-152
Author(s):  
Arlette Noels-Grötsch
Keyword(s):  
Main Sequence ◽  
Planetary Systems ◽  
Foreseeable Future ◽  
Time Line ◽  
Giant Stars ◽  
Large Samples ◽  
Formation And Evolution ◽  
Stellar Models ◽  
Red Giant ◽  
Age Determinations

AbstractAlthough a stellar age accuracy of about 10 % seems to be a reasonable requirement to draw a time line in the evolution of our Galaxy as well as in the formation and evolution of exo-planetary systems, theoretical stellar models are at present still too imperfect to really achieve this goal. Asteroseismic observations are definitely of invaluable assistance, especially if individual pulsation frequencies are available, which is still far from common. Large stellar samples are now in the spotlight with two different lines of attack, spectroscopic and photometric surveys as well as asteroseismic missions. I shall review the problems arising from stellar physics in the context of large stellar samples of main sequence and red giant stars, and I shall raise some alarm bells but also highlight some positive news for a drastic improvement in stellar age determinations below the limit of 10 % in a foreseeable future.

scholarly journals ALMA witnesses the assembly of first galaxies

2019 ◽  
Vol 15 (S352) ◽  
pp. 27-32
Author(s):  
Stefano Carniani
Keyword(s):  
Star Formation ◽  
Physical Properties ◽  
Rest Frame ◽  
Near Infrared ◽  
Far Infrared ◽  
Star Forming ◽  
Surrounding Environment ◽  
Infrared Surveys ◽  
Formation And Evolution ◽  
First Galaxies

AbstractCharacterising primeval galaxies entails the challenging goal of observing galaxies with modest star formation rates (SFR < 100 Mȯyr−1) and approaching the beginning of the reionisation epoch (z > 6). To date a large number of primeval galaxies have been identified thanks to deep near-infrared surveys. However, to further our understanding on the formation and evolution of such primeval objects, we must investigate their nature and physical properties through multi-band spectroscopic observations. Information on dust content, metallicity, interactions with the surrounding environment, and outflows can be obtained with ALMA observations of far-infrared (FIR) lines such as the [Cii] at 158 μm and [Oiii] at 88 μm. Here, we, thus, discuss the recent results unveiled by ALMA observations and present new [Cii] observations of BDF-3299, a star-forming galaxy at z = 7.1 showing a spatial and spectral offset between the rest-frame UV and the FIR lines emission.

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