MASS LOSS IN EVOLVED MASSIVE STARS IS ONE OF THE LEAST UNDERSTOOD YET FUNDAMENTAL ASPECTS OF STELLAR EVOLUTION. HOW AND WHEN DO MASSIVE STARS LOSE THEIR H-ENVEL...

expired opportunity(Expired)
From: Federal Procurement Data System(Federal)
NNX17AI13G

Basic Details

started - 27 Aug, 2019 (about 4 years ago)

Start Date

27 Aug, 2019 (about 4 years ago)
due - 27 Aug, 2019 (about 4 years ago)

Due Date

27 Aug, 2019 (about 4 years ago)
Contract

Type

Contract
NNX17AI13G

Identifier

NNX17AI13G
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

Customer / Agency

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
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MASS LOSS IN EVOLVED MASSIVE STARS IS ONE OF THE LEAST UNDERSTOOD YET FUNDAMENTAL ASPECTS OF STELLAR EVOLUTION. HOW AND WHEN DO MASSIVE STARS LOSE THEIR H-ENVELOPES? THIS CENTRAL QUESTION MOTIVATES THIS PROPOSAL. WE REQUEST A CONTINUATION OF OUR SUCCESSFUL NUSTAR PROGRAM THAT LED TO THE FIRST DETECTION OF A H-POOR EXTRAGALACTIC SN IN THE HARD X-RAYS. WE REQUEST NUSTAR OBSERVATIONS TO MAP THE UNIQUE SITUATION OF THE INTERACTION OF THE H-STRIPPED SN2014C WITH A H-RICH SHELL EJECTED BY ITS PROGENITOR STAR, AS PART OF OUR APPROVED GAMMA-RAY TO RADIO FOLLOW-UP. OUR GOAL IS TO COMPLETE THE MAPPING OF THE DENSITY PROFILE OF THE H-RICH MATERIAL AT R>7D17 CM TO DETERMINE ITS LOCATION AND TOTAL MASS, AND HENCE THE MASS-LOSS HISTORY OF THE PROGENITOR IN THE YEARS BEFORE STELLAR DEATH. 1
Solicitation ID/Procurement Identifier: NNX17AI13G
Ultimate Completion Date: Tue Aug 27 17:00:00 GMT

ILLINOIS,USA,602080001Location

Address: ILLINOIS,USA,602080001

Country : United StatesState : Illinois

Classification

R&D- SPACE: SCIENCE/APPLICATIONS (BASIC RESEARCH)/AR21