Quantum-state-selective electron recombination studies suggest enhanced abundance of primordial HeH+
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10405908" target="_blank" >RIV/00216208:11320/19:10405908 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4t8RcV8n38" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4t8RcV8n38</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1126/science.aax5921" target="_blank" >10.1126/science.aax5921</a>
Alternative languages
Result language
angličtina
Original language name
Quantum-state-selective electron recombination studies suggest enhanced abundance of primordial HeH+
Original language description
The epoch of first star formation in the early Universe was dominated by simple atomic and molecular species consisting mainly of two elements: hydrogen and helium. Gaining insight into this constitutive era requires a thorough understanding of molecular reactivity under primordial conditions. We used a cryogenic ion storage ring combined with a merged electron beam to measure state-specific rate coefficients of dissociative recombination, a process by which electrons destroy molecular ions. We found a pronounced decrease of the electron recombination rates for the lowest rotational states of the helium hydride ion (HeH+), compared with previous measurements at room temperature. The reduced destruction of cold HeH+ translates into an enhanced abundance of this primordial molecule at redshifts of first star and galaxy formation.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Science
ISSN
0036-8075
e-ISSN
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Volume of the periodical
365
Issue of the periodical within the volume
6454
Country of publishing house
US - UNITED STATES
Number of pages
4
Pages from-to
676-679
UT code for WoS article
000481688700043
EID of the result in the Scopus database
2-s2.0-85069513846