Abstract
We present the first two-dimensional mid-infrared images of the circumstellar dust distribution around the supergiant star α Scorpii. Our observations were made at wavelengths of 12.5 and 20.8 μm using the MIRLIN focal-plane array camera on the Keck II 10 m telescope, with spatial resolution (λ/D) of 0″.29 and 0″.48 at the two wavelengths, respectively. Our deconvolved images, which provide a resolution enhancement of approximately a factor of 2, show that the dust shell previously detected in one-dimensional scans is actually highly nonuniform. Specifically, the shell is now seen to be concentrated largely into three discrete clumps, and there is evidence of a more recent ejection which has left a central concentration of dust within about 0″.3 from the star.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 861-867 |
| Number of pages | 7 |
| Journal | Astrophysical Journal |
| Volume | 548 |
| Issue number | 2 PART 1 |
| DOIs | |
| State | Published - Feb 20 2001 |
| Externally published | Yes |
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Keywords
- Circumstellar matter
- Infrared: stars
- Stars: individual (α Scorpii)
- Stars: late-type
ASJC Scopus subject areas
- Space and Planetary Science
Cite this
Mid-infrared images of the circumstellar dust around α scorpii. / Marsh, K. A.; Bloemhof, E. E.; Koerner, David W; Ressler, M. E.
In: Astrophysical Journal, Vol. 548, No. 2 PART 1, 20.02.2001, p. 861-867.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Mid-infrared images of the circumstellar dust around α scorpii
AU - Marsh, K. A.
AU - Bloemhof, E. E.
AU - Koerner, David W
AU - Ressler, M. E.
PY - 2001/2/20
Y1 - 2001/2/20
N2 - We present the first two-dimensional mid-infrared images of the circumstellar dust distribution around the supergiant star α Scorpii. Our observations were made at wavelengths of 12.5 and 20.8 μm using the MIRLIN focal-plane array camera on the Keck II 10 m telescope, with spatial resolution (λ/D) of 0″.29 and 0″.48 at the two wavelengths, respectively. Our deconvolved images, which provide a resolution enhancement of approximately a factor of 2, show that the dust shell previously detected in one-dimensional scans is actually highly nonuniform. Specifically, the shell is now seen to be concentrated largely into three discrete clumps, and there is evidence of a more recent ejection which has left a central concentration of dust within about 0″.3 from the star.
AB - We present the first two-dimensional mid-infrared images of the circumstellar dust distribution around the supergiant star α Scorpii. Our observations were made at wavelengths of 12.5 and 20.8 μm using the MIRLIN focal-plane array camera on the Keck II 10 m telescope, with spatial resolution (λ/D) of 0″.29 and 0″.48 at the two wavelengths, respectively. Our deconvolved images, which provide a resolution enhancement of approximately a factor of 2, show that the dust shell previously detected in one-dimensional scans is actually highly nonuniform. Specifically, the shell is now seen to be concentrated largely into three discrete clumps, and there is evidence of a more recent ejection which has left a central concentration of dust within about 0″.3 from the star.
KW - Circumstellar matter
KW - Infrared: stars
KW - Stars: individual (α Scorpii)
KW - Stars: late-type
UR - http://www.scopus.com/inward/record.url?scp=0035916515&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035916515&partnerID=8YFLogxK
U2 - 10.1086/319035
DO - 10.1086/319035
M3 - Article
VL - 548
SP - 861
EP - 867
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2 PART 1
ER -