Episodic formation of cometary material in the outburst of a young Sun-like star

P. Abraham (Lead / Corresponding author), A. Juhasz, C. P. Dullemond, A. Kospal, R. Van Boekel, J. Bouwman, Th. Henning, A. Moor, L. Mosoni, A. Sicilia-Aguilar, N. Sipos

Research output: Contribution to journalLetter

91 Citations (Scopus)

Abstract

The Solar System originated in a cloud of interstellar gas and dust. The dust is in the form of amorphous silicate particles(1,2) and carbonaceous dust. The composition of cometary material, however, shows that a significant fraction of the amorphous silicate dust was transformed into crystalline form during the early evolution of the protosolar nebula(3). How and when this transformation happened has been a question of debate, with the main options being heating by the young Sun(4,5) and shock heating(6). Here we report mid-infrared features in the outburst spectrum of the young Sun-like star EX Lupi that were not present in quiescence. We attribute them to crystalline forsterite. We conclude that the crystals were produced through thermal annealing in the surface layer of the inner disk by heat from the outburst, a process that has hitherto not been considered. The observed lack of cold crystals excludes shock heating at larger radii.
Original languageEnglish
Pages (from-to)224-226
Number of pages3
JournalNature
Volume459
Issue number7244
DOIs
Publication statusPublished - 14 May 2009

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sun
dust
shock heating
stars
silicates
interstellar gas
solar nebula
forsterite
solar system
crystals
surface layers
heat
annealing
heating
radii

Keywords

  • CRYSTALLINE SILICATES PROTOPLANETARY DISKS INTERSTELLAR-MEDIUM DUST EVOLUTION SPECTRA GRAINS

Cite this

Abraham, P., Juhasz, A., Dullemond, C. P., Kospal, A., Van Boekel, R., Bouwman, J., ... Sipos, N. (2009). Episodic formation of cometary material in the outburst of a young Sun-like star. Nature, 459(7244), 224-226. https://doi.org/10.1038/nature08004
Abraham, P. ; Juhasz, A. ; Dullemond, C. P. ; Kospal, A. ; Van Boekel, R. ; Bouwman, J. ; Henning, Th. ; Moor, A. ; Mosoni, L. ; Sicilia-Aguilar, A. ; Sipos, N. / Episodic formation of cometary material in the outburst of a young Sun-like star. In: Nature. 2009 ; Vol. 459, No. 7244. pp. 224-226.
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abstract = "The Solar System originated in a cloud of interstellar gas and dust. The dust is in the form of amorphous silicate particles(1,2) and carbonaceous dust. The composition of cometary material, however, shows that a significant fraction of the amorphous silicate dust was transformed into crystalline form during the early evolution of the protosolar nebula(3). How and when this transformation happened has been a question of debate, with the main options being heating by the young Sun(4,5) and shock heating(6). Here we report mid-infrared features in the outburst spectrum of the young Sun-like star EX Lupi that were not present in quiescence. We attribute them to crystalline forsterite. We conclude that the crystals were produced through thermal annealing in the surface layer of the inner disk by heat from the outburst, a process that has hitherto not been considered. The observed lack of cold crystals excludes shock heating at larger radii.",
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Abraham, P, Juhasz, A, Dullemond, CP, Kospal, A, Van Boekel, R, Bouwman, J, Henning, T, Moor, A, Mosoni, L, Sicilia-Aguilar, A & Sipos, N 2009, 'Episodic formation of cometary material in the outburst of a young Sun-like star', Nature, vol. 459, no. 7244, pp. 224-226. https://doi.org/10.1038/nature08004

Episodic formation of cometary material in the outburst of a young Sun-like star. / Abraham, P. (Lead / Corresponding author); Juhasz, A.; Dullemond, C. P.; Kospal, A.; Van Boekel, R.; Bouwman, J.; Henning, Th.; Moor, A.; Mosoni, L.; Sicilia-Aguilar, A.; Sipos, N.

In: Nature, Vol. 459, No. 7244, 14.05.2009, p. 224-226.

Research output: Contribution to journalLetter

TY - JOUR

T1 - Episodic formation of cometary material in the outburst of a young Sun-like star

AU - Abraham, P.

AU - Juhasz, A.

AU - Dullemond, C. P.

AU - Kospal, A.

AU - Van Boekel, R.

AU - Bouwman, J.

AU - Henning, Th.

AU - Moor, A.

AU - Mosoni, L.

AU - Sicilia-Aguilar, A.

AU - Sipos, N.

PY - 2009/5/14

Y1 - 2009/5/14

N2 - The Solar System originated in a cloud of interstellar gas and dust. The dust is in the form of amorphous silicate particles(1,2) and carbonaceous dust. The composition of cometary material, however, shows that a significant fraction of the amorphous silicate dust was transformed into crystalline form during the early evolution of the protosolar nebula(3). How and when this transformation happened has been a question of debate, with the main options being heating by the young Sun(4,5) and shock heating(6). Here we report mid-infrared features in the outburst spectrum of the young Sun-like star EX Lupi that were not present in quiescence. We attribute them to crystalline forsterite. We conclude that the crystals were produced through thermal annealing in the surface layer of the inner disk by heat from the outburst, a process that has hitherto not been considered. The observed lack of cold crystals excludes shock heating at larger radii.

AB - The Solar System originated in a cloud of interstellar gas and dust. The dust is in the form of amorphous silicate particles(1,2) and carbonaceous dust. The composition of cometary material, however, shows that a significant fraction of the amorphous silicate dust was transformed into crystalline form during the early evolution of the protosolar nebula(3). How and when this transformation happened has been a question of debate, with the main options being heating by the young Sun(4,5) and shock heating(6). Here we report mid-infrared features in the outburst spectrum of the young Sun-like star EX Lupi that were not present in quiescence. We attribute them to crystalline forsterite. We conclude that the crystals were produced through thermal annealing in the surface layer of the inner disk by heat from the outburst, a process that has hitherto not been considered. The observed lack of cold crystals excludes shock heating at larger radii.

KW - CRYSTALLINE SILICATES PROTOPLANETARY DISKS INTERSTELLAR-MEDIUM DUST EVOLUTION SPECTRA GRAINS

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Abraham P, Juhasz A, Dullemond CP, Kospal A, Van Boekel R, Bouwman J et al. Episodic formation of cometary material in the outburst of a young Sun-like star. Nature. 2009 May 14;459(7244):224-226. https://doi.org/10.1038/nature08004