An attempt to derive Mg isotopic ratios in carbon stars

Bibcode
2004MmSAI..75..596Z
Zamora, O.; Abia, C.; de Laverny, P.; Domínguez, I.
Bibliographical reference

Memorie della Società Astronomica Italiana, v.75, p.596 (2004)

Advertised on:
0
2004
Number of authors
4
IAC number of authors
0
Citations
1
Refereed citations
1
Description
We discuss the use of the spectral range near 7570 Å to determine the Mg isotopic ratios in carbon stars using the B'2 Sigma +-X 2 Sigma + system of the MgH molecule. We also compare with the spectral range near 5140 Å that has been commonly used in normal stars (oxygen-rich stars). The region near 5140 Å is not the better choice for carbon stars because it is very crowded with CN and C_2 molecular bands and the localization of the continuum is complicated. The range near 7570 Å is less blended with molecular bands. The continuum is easy to locate and the isotopic splitting between MgH isotopic absorptions is larger. Unfortunately, we are not able to reproduce accurately the observed spectrum in this region and, moreover, the synthetic spectrum is not sensitive to large variations in the isotopic ratios.
Type
Non-refereed
Carbon stars
Nucleosynthesis
Stellar abundances

It may interest you

  • Non-refereed
    Workshop summary: Kaons@CERN 2023

    Kaon physics is at a turning point - while the rare-kaon experiments NA62 and KOTO are in full swing, the end of their lifetime is approaching and the future experimental landscape needs to be defined. With HIKE, KOTO-II and LHCb-Phase-II on the table and under scrutiny, it is a very good moment in time to take stock and contemplate about the

    Anzivino, G. et al.

    Advertised on:

    4
    2024
    Bibcode
    2024EPJC...84..377A
    Citations
    0
  • Non-refereed
    First light and results for atmospheric characterization with The Near Infra-Red Planet Searcher (NIRPS)

    NIRPS is a new fiber-fed high spectral resolution (~80k) spectrograph assisted by adaptive optics installed on the 3.6m telescope of ESO at LaSilla, Chile. Operated simultaneously with HARPS, NIRPS covers the Y, J, and H bands. The commissioning phase demonstrated high stability for time-series observations along precise radial velocities reaching

    Allart, Romain et al.

    Advertised on:

    4
    2024
    Bibcode
    2024ESS.....562419A
    Citations
    0
  • Non-refereed
    Nodal Precession of a Hot Jupiter Transiting the Edge of a Late A-Type Star TOI-1518

    TOI-1518b, a hot Jupiter around a late A-type star, is one of the few planetary systems that transit the edge of the stellar surface (the impact parameter b~0.9) among hot Jupiters around hot stars (Cabot et al. 2021). The host star's high rotation speed (Vsini s~85 km s -1) and the planet's nearly polar orbit (λ~120 deg) may cause a nodal

    Watanabe, Noriharu et al.

    Advertised on:

    4
    2024
    Bibcode
    2024ESS.....561705W
    Citations
    0