The primordial Helium abundance

Bibcode
2003como.conf..159L
Luridiana, V.
Bibliographical reference

The cosmological model, proceedings of the XXXVIIth Rencontres de Moriond, Edited by Y. Giraud-Héraud, C. Magneville, J. Tran Thanh Van, The Gioi Publishers (Vietnam), 159, 2003.

Advertised on:
10
2003
Number of authors
1
IAC number of authors
0
Citations
8
Refereed citations
3
Description
The primordial abundance of 4He, YP, is one of the hottest themes in present-day astronomy, mostly due to its cosmological relevance. The disagreement between different determinations has been currently reduced to the 1-2% level, but these differences are still large enough to have deep implications for Big-Bang nucleosynthesis. It is therefore crucial to estimate precisely the uncertainties involved in the measurement of YP. Here, I review the methods used in the determination of YP and the related uncertainties. I also discuss some recent results, and emphasize the assumptions underlying the differences among them.
Type
Non-refereed
Galaxies
Cosmological parameters
Early universe

It may interest you

  • Non-refereed
    The LiteBIRD mission to explore cosmic inflation
    LiteBIRD, the next-generation cosmic microwave background (CMB) experiment, aims for a launch in Japan's fiscal year 2032, marking a major advancement in the exploration of primordial cosmology and fundamental physics. Orbiting the Sun-Earth Lagrangian point L2, this JAXA-led strategic L-class mission will conduct a comprehensive mapping of the CMB
    Ghigna, T. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13092E..28G
    Citations
    0
  • Non-refereed
    Performance of MAGIC stellar intensity interferometer and expansion to MAGIC + CTAO-LST1 stellar intensity interferometer
    A new generation of optical intensity interferometers are emerging in recent years taking advantage of the existing infrastructure of Imaging Atmospheric Cherenkov Telescopes (IACTs). The MAGIC SII (Stellar Intensity Interferometer) in La Palma, Spain, has been operating since its first successful measurements in 2019 and its current design allows
    Cifuentes, Alejo et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13095E..27C
    Citations
    0
  • Non-refereed
    GTC adaptive optics integration in telescope and first commissioning results
    The Adaptive Optics (AO) of the Gran Telescopio Canarias (GTC) is a single conjugate postfocal system, integrated in one of the Nasmyth platforms of the telescope. GTC is located in the Observatory of Roque de Los Muchachos (ORM) in the island of La Palma, Spain. GTCAO is based on a single deformable mirror (DM) with 373 actuators, conjugated to
    Reyes García-Talavera, Marcos et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13097E..0ER
    Citations
    0