A semiempirical model for heavy element depletion in the interstellar medium

Trivedi, B. M. P.; Larimer, J. W.

doi:10.1086/159181

Cited by 6 publications

(4 citation statements)

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“…From there it may evolve into spinel (MgAl 2 O 4 ) and eventually into a Ca and Al-bearing silicate. The latter are stable compounds, thanks to very high binding energies (Trivedi & Larimer 1981). Calcium is mostly locked in dust in silicates (e.g., CaMgSi 2 O 6 ;Field 1974;Trivedi & Larimer 1981).…”

Section: Elements In This Studymentioning

confidence: 99%

“…The latter are stable compounds, thanks to very high binding energies (Trivedi & Larimer 1981). Calcium is mostly locked in dust in silicates (e.g., CaMgSi 2 O 6 ;Field 1974;Trivedi & Larimer 1981). Calcium carbonates, possibly formed in AGB stars envelopes (e.g., Kemper et al 2002), are believed to be unstable and therefore Ca inclusion in silicates, which already form at high temperatures, are favored (Ferrarotti & Gail 2005).…”

Section: Elements In This Studymentioning

confidence: 99%

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X-ray extinction from interstellar dust

Costantini

Zeegers

Rogantini

et al. 2019

A&A

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Aims. We present a study on the prospects of observing carbon, sulfur, and other lower abundance elements (namely Al, Ca, Ti, and Ni) present in the interstellar medium using future X-ray instruments. We focus in particular on the detection and characterization of interstellar dust along the lines of sight. Methods. We compared the simulated data with different sets of dust aggregates, either obtained from past literature or measured by us using the SOLEIL-LUCIA synchrotron beamline. Extinction by interstellar grains induces modulations of a given photolelectric edge, which can be in principle traced back to the chemistry of the absorbing grains. We simulated data of instruments with characteristics of resolution and sensitivity of the current Athena, XRISM, and Arcus concepts. Results. In the relatively near future, the depletion and abundances of the elements under study will be determined with confidence. In the case of carbon and sulfur, the characterization of the chemistry of the absorbing dust will be also determined, depending on the dominant compound. For aluminum and calcium, despite the large depletion in the interstellar medium and the prominent dust absorption, in many cases the edge feature may not be changing significantly with the change of chemistry in the Al- or Ca-bearing compounds. The exinction signature of large grains may be detected and modeled, allowing a test on different grain size distributions for these elements. The low cosmic abundance of Ti and Ni will not allow us a detailed study of the edge features.

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Section: Elements In This Studymentioning

confidence: 99%

Section: Elements In This Studymentioning

confidence: 99%

X-ray extinction from interstellar dust

Costantini

Zeegers

Rogantini

et al. 2019

A&A

View full text Add to dashboard Cite

show abstract

Section: The Elements In This Studymentioning

confidence: 99%

“…Calcium is mostly locked in dust in silicates (e.g. CaMgSi 2 O 6 , Field 1974;Trivedi & Larimer 1981). Calcium carbonates, possibly formed in AGB stars envelopes (e.g.…”

Section: The Elements In This Studymentioning

confidence: 99%

X-ray extinction from interstellar dust: Prospects of observing carbon, sulfur and other trace elements

Costantini,

Zeegers,

Rogantini

et al. 2019

Preprint

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Aims. We present a study on the prospects of observing carbon, sulfur, and other lower abundance elements (namely Al, Ca, Ti and Ni) present in the interstellar medium using future X-ray instruments. We focus in particular on the detection and characterization of interstellar dust along the lines of sight. Methods. We compare the simulated data with different sets of dust aggregates, either obtained from past literature or measured by us using the SOLEIL-LUCIA synchrotron beamline. Extinction by interstellar grains induces modulations of a given photolelectric edge, which can be in principle traced back to the chemistry of the absorbing grains. We simulated data of instruments with characteristics of resolution and sensitivity of the current Athena, XRISM and Arcus concepts. Results. In the relatively near future, the depletion and abundances of the elements under study will be determined with confidence. In the case of carbon and sulfur, the characterization of the chemistry of the absorbing dust will be also determined, depending on the dominant compound. For aluminum and calcium, despite the large depletion in the interstellar medium and the prominent dust absorption, in many cases the edge feature may not be changing significantly with the change of chemistry in the Al-or Ca-bearing compounds. The exinction signature of large grains may be detected and modeled, allowing a test on different grain size distributions for these elements. The low cosmic abundance of Ti and Ni will not allow us a detailed study of the edge features.

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The geochemical behavior of refractory noble metals and lithophile trace elements in refractory inclusions in carbonaceous chondrites

Fegley

Kornacki

1984

Earth and Planetary Science Letters

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A semiempirical model for heavy element depletion in the interstellar medium

Cited by 6 publications

References 0 publications

X-ray extinction from interstellar dust

X-ray extinction from interstellar dust

X-ray extinction from interstellar dust: Prospects of observing carbon, sulfur and other trace elements

The geochemical behavior of refractory noble metals and lithophile trace elements in refractory inclusions in carbonaceous chondrites

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