J/other/Sci/348.413 Sgr A East SNR multiwavelength images (Lau+, 2015)
Old supernova dust factory revealed at the Galactic Center.
Lau R.M., Herter T.L., Morris M.R., Li Z., Adams J.D.
<Science, 348, 413-418 (2015)>
=2015Sci...348..413L 2015Sci...348..413L (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Milky Way ; Photometry, millimetric/submm ;
Radio sources ; X-ray sources
Abstract:
Dust formation in supernova ejecta is currently the leading candidate
to explain the large quantities of dust observed in the distant, early
universe. However, it is unclear whether the ejecta-formed dust can
survive the hot interior of the supernova remnant (SNR). We present
infrared observations of ∼0.02 solar masses of warm (∼100 kelvin) dust
seen near the center of the ∼10,000-year-old Sagittarius A East SNR at
the Galactic center. Our findings indicate the detection of dust
within an older SNR that is expanding into a relatively dense
surrounding medium (electron density ∼103 centimeters-3) and has
survived the passage of the reverse shock. The results suggest that
supernovae may be the dominant dust-production mechanism in the dense
environment of galaxies of the early universe.
Description:
Mid-IR, far-IR, sub-mm, radio, and X-ray images utilized in our
analysis of the Sgr A East SNR. 5.8 and 8um Spitzer/IRAC data are
labeled SgrAE5_8.fits and SgrAE8.fits, respectively. SOFIA/FORCAST
images at 7.7, 19.7, 25.2, 31.5, and 37.1um are labeled SgrAE7_7.fits,
SgrAE19.fits, SgrAE25.fits, SgrAE31.fits, and SgrAE37.fits,
respectively. Herschel/PACS images at 70 and 160um are labeled
SgrAE70.fits and SgrAE160.fits, respectively. The VLA 6cm radio image
is labeled SgrAE6cm.fits. The Chandra/ACIS-I X-ray continuum and Fe
Kα images are labeled SgrAEWflux2_8.fits and
SgrAEWflux6.3_7.1.fits, respectively.
Objects:
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RA (2000) DE Designation(s)
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17 45 47 -29 00.2 Sgr A East SNR = NAME SGR A EAST
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 117 12 List of fits images
fits/* . 12 Individual fits images
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 22 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 50 A23 --- Obs.Date Observation date
52- 55 I4 Kibyte size Size of FITS file
57- 80 A24 --- FileName Name of FITS file, in subdirectory fits
82-117 A36 --- Title Title of the FITS file
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Nov-2015