scholarly journals Parametric design study of the Orbiting Astronomical Satellite for Investigating Stellar Systems (OASIS) space telescope

2021 ◽  
Author(s):  
Siddhartha Sirsi ◽  
Yuzuru Takashima ◽  
Art Palisoc ◽  
Aman Chandra ◽  
Christopher K. Walker ◽  
...  
Keyword(s):  
Parametric Design ◽  
Stellar Systems ◽  
Design Study ◽  
Space Telescope ◽  
Astronomical Satellite

Lyot coronagraph design study for large, segmented space telescope apertures

2016 ◽  
Author(s):  
Neil T. Zimmerman ◽  
Mamadou N'Diaye ◽  
Kathryn E. St. Laurent ◽  
Rémi Soummer ◽  
Laurent Pueyo ◽  
...  
Keyword(s):  
Design Study ◽  
Space Telescope

Internal kinematics of multiple stellar populations in globular clusters

2019 ◽  
Vol 14 (S351) ◽  
pp. 324-328
Author(s):  
Mattia Libralato
Keyword(s):  
High Precision ◽  
Globular Clusters ◽  
Hubble Space Telescope ◽  
Stellar Populations ◽  
Stellar Systems ◽  
Proper Motions ◽  
Space Telescope ◽  
Formation And Evolution ◽  
Galactic Globular Clusters ◽  
Shed Light

AbstractSpectroscopy and photometry have revealed existence, complexity and properties of the multiple stellar populations (mPOPs) hosted in Galactic globular clusters. However, the conundrum of the formation and evolution of mPOPs is far from being completely exploited: the available pieces of information seem not enough to shed light on these topics. Astrometry, and in particular high-precision proper motions, can provide us the sought-after answers about how mPOPs formed and have evolved in these ancient stellar systems. In the following, I present a brief overview of the observational results on the internal kinematics of the mPOPs in some GCs thanks to Hubble Space Telescope high-precision proper motions.

scholarly journals Parametric Design Study on Aerodynamic Characteristics of Variable Pitot Inlets for Transonic and Supersonic Civil Aviation

2019 ◽  
Vol 304 ◽  
pp. 02017 ◽  
Author(s):  
Stefan Kazula ◽  
Mark Wöllner ◽  
David Grasselt ◽  
Klaus Höschler
Keyword(s):  
Design Space ◽  
Parametric Design ◽  
Aerodynamic Characteristics ◽  
Geometric Parameters ◽  
Civil Aviation ◽  
Potential Range ◽  
Design Study ◽  
Aero Engine ◽  
Inlet Length ◽  
Evaluation Parameters

This paper reveals the influence of selected geometric parameters on the aerodynamic performance of circular variable aero engine inlets in transonic and supersonic civil aviation. The trade-off in inlet design and aerodynamic evaluation parameters are presented. The approach to investigate the dependencies between the aerodynamic and geometric parameters at different flight conditions by means of a parametric design study is introduced. The dependencies of inlet drag and efficiency from geometric parameters at flight speeds of Mach 0.95 up to Mach 1.6 are identified. Although entailing additional weight, the inlet length represents the parameter with the highest potential for drag reduction by up to 50% in the selected design space. Ideal geometries for variable pitot inlets are determined. After considering weight, their potential range benefit nearly disappears for subsonic applications, but remains above 20% for supersonic flight at Mach 1.6.

A parametric design tool for large space telescope sunshields

2006 ◽  
Author(s):  
Christopher G. Paine ◽  
Charles M. Bradford ◽  
Mark C. Dragovan ◽  
Harold W. Yorke
Keyword(s):  
Parametric Design ◽  
Design Tool ◽  
Large Space ◽  
Space Telescope
Sign in / Sign up

Export Citation Format

Share Document