Infrared studies of H II regions - The Sharpless regions S148, 184, 198, 206 and 269

Bibcode
1991MNRAS.249..385P
Pismis, Paris; Mampaso, Antonio
Bibliographical reference

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, April 1, 1991, p. 385-403. Research supported by Universidad Nacional Autonoma de Mexico and Ministerio de Educacion y Ciencia of Spain.

Advertised on:
4
1991
Number of authors
2
IAC number of authors
1
Citations
15
Refereed citations
15
Description
The results of a combined near-infrared and IRAS mapping study of five H II regions are presented for which fairly complete information at optical and radio wavelengths previously existed. The near-infrared observations, carried out with the 2.1-m telescope at Observatorio de San Pedro Martir (Mexico), made it possible to study the stellar content at the core of each nebula, while an analysis of extended near-infrared emission zones showed these to arise mainly from ionized gas (S148 and S206) or through scattering and thermal emission from dust grains surrounding a massive young star (S269-IRS2). The analysis of IRAS data, on the other hand, suggests that two different populations of grains contribute to the observed 12- to 100-micron fluxes, and these are modeled with a small sized, PAH-type, grain component plus the 'standard' interstellar silicate grains.
Type
Refereed
H II regions
Star formation
Stellar cores

It may interest you

  • Refereed
    TESS and ESPRESSO discover a super-Earth and a mini-Neptune orbiting the K-dwarf TOI-238*
    The number of super-Earth and mini-Neptune planet discoveries has increased significantly in the last two decades thanks to transit and radial velocity (RV) surveys. When it is possible to apply both techniques, we can characterise the internal composition of exoplanets, which in turn provides unique insights on their architecture, formation and
    D'Odorico, V. et al.

    Advertised on:

    5
    2024
    Bibcode
    2024A&A...685A..56S
    Citations
    0
  • Refereed
    Dramatic Drop in the X-Ray Polarization of Swift J1727.8–1613 in the Soft Spectral State
    Black hole X-ray binaries exhibit different spectral and timing properties in different accretion states. The X-ray outburst of a recently discovered and extraordinarily bright source, Swift J1727.8–1613, has enabled the first investigation of how the X-ray polarization properties of a source evolve with spectral state. The 2–8 keV polarization
    Svoboda, Jiří et al.

    Advertised on:

    5
    2024
    Bibcode
    2024ApJ...966L..35S
    Citations
    0
  • Refereed
    Overmassive Black Holes at Cosmic Noon: Linking the Local and the High-redshift Universe
    We report for the first time a sample of 12 supermassive black holes (SMBHs) hosted by low-mass galaxies at cosmic noon, i.e., in a redshift range consistent with the peak of star formation history: z ∼ 1–3. These black holes are 2 orders of magnitude too massive for the stellar content of their hosts when compared with the local relation for
    Mezcua, Mar et al.

    Advertised on:

    5
    2024
    Bibcode
    2024ApJ...966L..30M
    Citations
    0