Metal-poor Wolf-Rayet star enriching the ISM by nitrogen in the galaxy NGC 4068

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00599310" target="_blank" >RIV/67985815:_____/24:00599310 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1017/S1743921322002460" target="_blank" >http://dx.doi.org/10.1017/S1743921322002460</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1017/S1743921322002460" target="_blank" >10.1017/S1743921322002460</a>

Result language
angličtina
Original language name
Metal-poor Wolf-Rayet star enriching the ISM by nitrogen in the galaxy NGC 4068
Original language description
We discovered a nebula in the low-metallicity (Z=0.1 Z) nearby (D = 4.4 Mpc) dwarf galaxy NGC 4068, which reveals broad Hα line profile and unusual emission line fluxes in its spectrum. The object also shows significant nitrogen overabundance, not typical for metal-poor environment. We assumed that the nebula could be ionized by an evolved massive star with M ≈ 80 M, Wolf-Rayet or Blue Supergiant, and built models of the nebula using Cloudy and CMFGEN codes. Our models successfully reproduce the optical emission spectrum of the object, including the peculiar [SII]/[NII] ratio and the presence of the HeII λ4686 line.
Czech name
—
Czech description
—

Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of the International Astronomical Union
ISBN
—
ISSN
1743-9213
e-ISSN
1743-9221
Number of pages
2
Pages from-to
513-514
Publisher name
Cambridge University Press
Place of publication
Cambridge
Event location
Ballyconnell
Event date
May 8, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—

Similar results(10)