SHADOW: StarsHADe Observations of new Worlds Ashlee Wilkins - - PowerPoint PPT Presentation

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Sep 29, 2022 207 likes •303 views

SHADOW: StarsHADe Observations of new Worlds Ashlee Wilkins (University of Maryland), Abhi Rajan (Arizona State University), lvaro Ribas (European Space Astronomy Center), Alexandra Greenbaum (Johns Hopkins University) Finding other Earths

SLIDE 1

SHADOW:

StarsHADe Observations of new Worlds

Ashlee Wilkins (University of Maryland), Abhi Rajan (Arizona State University), Álvaro Ribas (European Space Astronomy Center), Alexandra Greenbaum (Johns Hopkins University)

SLIDE 2

Finding other Earths

Medium-size $4bn Starshade Exoplanet mission
5 year dedicated mission
Target likely Earth analogs

SLIDE 3

Mission Design

Launch

Spacecraft D (Tel)
Launch Vehicle F
Spacecraft Z

(Starshade) Operations

Trailing Orbit
3.5 m Telescope
42 m starshade

SLIDE 4

Planet Yields

Earth: 5.5 (nEarth = 0.1) Warm Neptune: 2.54 (nWarm Neptune = 0.05) Jupiter: 0.94 (nJupiter = 0.01) Neptune: 0.52 (nNeptune = 0.05)

SLIDE 5

SLIDE 6

Budget & Cost Trade-Off

Pricetag: 3.5m telescope

$3.43 billion.

Tradeoffs: Smaller telescope mirror (3.5m vs. 4.0m) saves $1.5 billion and equals loss <0.5 Earths Larger starshade (42m vs. 30m) costs 200mn vs. 120mn

SLIDE 7

Scope (Time on/off survey)

5 Year Survey 100 stars --- 100% Exoplanet Science. Starshade slew time = 16 days Survey time = 0.6 yrs out of 5 yrs Mission will provide significant GO opportunity

SLIDE 8

Summary

Expect ~6 earths
lots of time for other science.
Within $4 billion budget
Scalability: Room for more starshades to

increase yield

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