Near-infrared line-strengths in elliptical galaxies: evidence for initial mass function variations?

Bibcode
2003MNRAS.339L..12C
DOI
10.1046/j.1365-8711.2003.06360.x
Cenarro, A. J.; Gorgas, J.; Vazdekis, A.; Cardiel, N.; Peletier, R. F.
Bibliographical reference

Monthly Notice of the Royal Astronomical Society, Volume 339, Issue 1, pp. L12-L16.

Advertised on:
2
2003
Number of authors
5
IAC number of authors
1
Citations
164
Refereed citations
148
Description
We present new relations between recently defined line-strength indices in the near-infrared (CaT*, CaT, PaT, MgI and sTiO) and central velocity dispersion (σ0) for a sample of 35 early-type galaxies, showing evidence for significant anti-correlations between CaII triplet indices (CaT* and CaT) and log σ0. These relations are interpreted in the light of our recent evolutionary synthesis model predictions, suggesting the existence of important Ca underabundances with respect to Fe and/or an increase of the dwarf to giant stars ratio along the mass sequence of elliptical galaxies.
Type
Refereed
Galaxies

It may interest you

  • Refereed
    Detection of Na in the atmosphere of the hot Jupiter HAT-P-55b
    The spectral signatures of optical absorbers, when combined with those of infrared molecules, play a critical role in constraining the cloud properties of exoplanet atmospheres. We aim to use optical transmission spectroscopy to confirm the tentative color signature previously observed by multiband photometry in the atmosphere of hot Jupiter HAT-P
    Kang, Huiyi et al.

    Advertised on:

    7
    2024
    Bibcode
    2024A&A...687A...9K
    Citations
    0
  • Refereed
    The COSMOS-Web ring: In-depth characterization of an Einstein ring lensing system at z ∼ 2
    Aims: We provide an in-depth analysis of the COSMOS-Web ring, an Einstein ring at z ≈ 2 that we serendipitously discovered during the data reduction of the COSMOS-Web survey and that could be the most distant lens discovered to date. Methods: We extracted the visible and near-infrared photometry of the source and the lens from more than 25 bands
    Mercier, W. et al.

    Advertised on:

    7
    2024
    Bibcode
    2024A&A...687A..61M
    Citations
    0
  • Refereed
    Migration and Evolution of giant ExoPlanets (MEEP). I. Nine Newly Confirmed Hot Jupiters from the TESS Mission
    Hot Jupiters were many of the first exoplanets discovered in the 1990s, but in the decades since their discovery the mysteries surrounding their origins have remained. Here we present nine new hot Jupiters (TOI-1855 b, TOI-2107 b, TOI-2368 b, TOI-3321 b, TOI-3894 b, TOI-3919 b, TOI-4153 b, TOI-5232 b, and TOI-5301 b) discovered by NASA's TESS
    Schulte, Jack et al.

    Advertised on:

    7
    2024
    Bibcode
    2024AJ....168...32S
    Citations
    0