Extragalactic abstracts - IRSA - California Institute of Technology
Extragalactic abstracts - IRSA - California Institute of Technology
Extragalactic abstracts - IRSA - California Institute of Technology
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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 />
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