16.11.2012 Views

Extragalactic abstracts - IRSA - California Institute of Technology

Extragalactic abstracts - IRSA - California Institute of Technology

Extragalactic abstracts - IRSA - California Institute of Technology

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Spitzer_Approved_<strong>Extragalactic</strong><br />

Mar 25, 10 16:24 Page 11/742<br />

Spitzer Space Telescope − General Observer Proposal #40149<br />

The Continuing Infrared Evolution <strong>of</strong> SN1987A<br />

Principal Investigator: Eli Dwek<br />

Institution: NASA Goddard Space Flight Center<br />

Technical Contact: Eli Dwek, NASA Goddard Space Flight Center<br />

Co−Investigators:<br />

Richard Arendt, CRESST/UMBC/GSFC<br />

Patrice Bouchet, Observatoire de Paris<br />

David Burrows, Pennsylvania State University<br />

Peter Challis, Harvard−Smithsonian CfA<br />

John Danziger, Osservatorio Astronomico de Trieste<br />

James De Buizer, Gemini Observatory<br />

Robert Gehrz, University <strong>of</strong> Minnesota<br />

Robert Kirshner, Harvard−Smithsonian CfA<br />

Richard McCray, University <strong>of</strong> Colorado<br />

Sangwook Park, Pennsylvania State University<br />

Elisha Polomski, University <strong>of</strong> Minnesota<br />

Charles Woodward, University <strong>of</strong> Minnesota<br />

Science Category: Local Group Galaxies<br />

Observing Modes: IracMap IrsMap IrsStare MipsPhot MipsSed<br />

Hours Approved: 19.5<br />

Abstract:<br />

We will use the SPITZER to continue the ongoing monitoring <strong>of</strong> SN1987A, the<br />

youngest supernova remnant that is undergoing noticable evolutionary changes<br />

during the lifetime <strong>of</strong> the Great Observatories. At infrared wavelengths SN1987A<br />

provides a unique complimentary view <strong>of</strong> the interaction <strong>of</strong> the SN blast wave<br />

with the equatorial ring (ER). Dust in theÊ ERÊ is being swept up by the<br />

expanding shock and collisionally heated by the X−ray emitting gas observed with<br />

CHANDRA, giving rise to IR emission that reveals the composition and amount <strong>of</strong><br />

dust that formed in the outflow <strong>of</strong> the presupernova star. The IR observations<br />

also provide a unique tool for studying physical processes − the collisional<br />

heating and destruction <strong>of</strong> dust −Ê in dusty X−ray emitting plasmas. Parts <strong>of</strong> the<br />

blast wave has penetrated the denser regions <strong>of</strong> the ER, creating the "hotspots"<br />

observed with HUBBLE. IR line emission from these regions provide important<br />

information on the physical conditions and theÊelemental and dust composition in<br />

these cooling shocks. Additionally, the ejecta <strong>of</strong> the SN explosion contains dust<br />

that was observed to have formed about 530 days after the explosion. Its<br />

imminent interaction with the ring will heat up this dust, which will be<br />

observable with SPITZER. In addition to providing useful information on SN1987A<br />

and its environment, the proposed observations will address key global issues<br />

regarding the origin and evolution <strong>of</strong> dust in the universe: how much dust is<br />

formed in SN ejecta and in quiescent stellar outflows, and how efficiently<br />

grains are destroyed by interstellar shock waves.<br />

Spitzer_Approved_<strong>Extragalactic</strong><br />

Printed_by_SSC<br />

Mar 25, 10 16:24 Page 12/742<br />

Spitzer Space Telescope − General Observer Proposal #30067<br />

THE INFRARED EVOLUTION OF SN1987A<br />

Principal Investigator: Eli Dwek<br />

Institution: NASA Goddard Space Flight Center<br />

Technical Contact: Eli Dwek, NASA Goddard Space Flight Center<br />

Co−Investigators:<br />

Richard Arendt, SSAI/NASA GSFC<br />

Patrice Bouchet, Observatoire de Paris<br />

David Burrows, Pennsylvania State University<br />

Peter Challis, Harvard−Smithsonian CfA<br />

John Danziger, Osservatorio Astronomico de Trieste<br />

James De Buizer, Gemini Observatory<br />

Robert Gehrz, University <strong>of</strong> Minnesota<br />

Robert Kirshner, Harvard−Smithsonian CfA<br />

Richard McCray, University <strong>of</strong> Colorado<br />

Sangwook Park, Pennsylvania State University<br />

Elisha Polomski, University <strong>of</strong> Minnesota<br />

Charles Woodward, University <strong>of</strong> Minnesota<br />

Science Category: local group galaxies<br />

Observing Modes: IracMap IrsMap IrsStare MipsPhot MipsSed<br />

Hours Approved: 19.5<br />

Abstract:<br />

We will use the SPITZER to continue the ongoing monitoring <strong>of</strong> SN1987A, the<br />

youngest supernova remnant that is undergoing noticable evolutionary changes<br />

during the lifetime <strong>of</strong> the Great Observatories. At infrared wavelengths SN1987A<br />

provides a unique complimentary view <strong>of</strong> the interaction <strong>of</strong> the SN blast wave<br />

with the equatorial ring (ER). Dust in the ER is being swept up by the expanding<br />

shock and collisionally heated by the X−ray emitting gas observed with CHANDRA,<br />

giving rise to IR emission that reveals the composition and amount <strong>of</strong> dust that<br />

formed in the outflow <strong>of</strong> the presupernova star. The IR observations also provide<br />

a unique tool for studying physical processes − the collisional heating and<br />

destruction <strong>of</strong> dust in dusty X−ray emitting plasmas. Parts <strong>of</strong> the blast wave has<br />

penetrated the denser regions <strong>of</strong> the ER, creating the "hotspots" observed with<br />

HUBBLE. IR line emission from these regions provide important information on the<br />

physical conditions and the elemental and dust composition in these cooling<br />

shocks. Additionally, the ejecta <strong>of</strong> the SN explosion contains dust that was<br />

observed to have formed about 530 days after the explosion. Its imminent<br />

interaction with the ring will heat up this dust, which will be observable with<br />

SPITZER. In addition to providing useful information on SN1987A and its<br />

environment, the proposed observations will address key global issues regarding<br />

the origin and evolution <strong>of</strong> dust in the universe: how much dust is formed in SN<br />

ejecta and in quiescent stellar outflows, and how efficiently grains are<br />

destroyed by interstellar shock waves.<br />

Thursday March 25, 2010 xgal_covers.txt<br />

6/371

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!