Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31557
Title: Production of Very Light Elements and Strontium in the Early Ejecta of Neutron Star Mergers
Authors: Perego, Albino
VESCOVI, DIEGO 
FIORE, ACHILLE 
Chiesa, Leonardo
Vogl, Christian
BENETTI, Stefano 
Bernuzzi, Sebastiano
Branchesi, Marica 
CAPPELLARO, Enrico 
CRISTALLO, Sergio 
Flörs, Andreas
Kerzendorf, Wolfgang E.
Radice, David
Issue Date: 2022
Journal: THE ASTROPHYSICAL JOURNAL 
Number: 925
Issue: 1
First Page: 22
Abstract: We study the production of very light elements (Z < 20) in the dynamical and spiral-wave wind ejecta of binary neutron star mergers by combining detailed nucleosynthesis calculations with the outcome of numerical relativity merger simulations. All our models are targeted to GW170817 and include neutrino radiation. We explore different finite-temperature, composition-dependent nuclear equations of state, and binary mass ratios, and find that hydrogen and helium are the most abundant light elements. For both elements, the decay of free neutrons is the driving nuclear reaction. In particular, ∼0.5-2 10-6 M o˙ of hydrogen are produced in the fast expanding tail of the dynamical ejecta, while ∼1.5-11 10-6 M o˙ of helium are synthesized in the bulk of the dynamical ejecta, usually in association with heavy r-process elements. By computing synthetic spectra, we find that the possibility of detecting hydrogen and helium features in kilonova spectra is very unlikely for fiducial masses and luminosities, even when including nonlocal thermodynamic equilibrium effects. The latter could be crucial to observe helium lines a few days after merger for faint kilonovae or for luminous kilonovae ejecting large masses of helium. Finally, we compute the amount of strontium synthesized in the dynamical and spiral-wave wind ejecta, and find that it is consistent with (or even larger than, in the case of a long-lived remnant) the one required to explain early spectral features in the kilonova of GW170817.
URI: http://hdl.handle.net/20.500.12386/31557
URL: https://iopscience.iop.org/article/10.3847/1538-4357/ac3751
https://api.elsevier.com/content/abstract/scopus_id/85124161817
ISSN: 0004-637X
DOI: 10.3847/1538-4357/ac3751
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat
Perego_2022_ApJ_925_22.pdfPdf editoriale2.89 MBAdobe PDFView/Open
Show full item record

Page view(s)

12
checked on Jun 24, 2022

Download(s)

10
checked on Jun 24, 2022

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE