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

Bibcode
1991MNRAS.249..385P
Pismis, Paris; Mampaso, Antonio
Referencia bibliográfica

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.

Fecha de publicación:
4
1991
Número de autores
2
Número de autores del IAC
1
Número de citas
15
Número de citas referidas
15
Descripción
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.
Tipo
Con árbitro
Regiones H II
Formación estelar
Corazones estelares

Te puede interesar

  • Con árbitro
    Constraints on compact objects from the Dark Energy Survey 5-yr supernova sample
    Gravitational lensing magnification of Type Ia supernovae (SNe Ia) allows information to be obtained about the distribution of matter on small scales. In this paper, we derive limits on the fraction $\alpha$ of the total matter density in compact objects (which comprise stars, stellar remnants, small stellar groupings, and primordial black holes)
    Shah, P. et al.

    Fecha de publicación:

    1
    2025
    Bibcode
    2025MNRAS.536..946S
    Número de citas
    0
  • Con árbitro
    Multiband Optical Variability of the Blazar 3C 454.3 on Diverse Timescales
    Due to its peculiar and highly variable nature, the blazar 3C 454.3 has been extensively monitored by the WEBT team. Here, we present for the first time these long-term optical flux and color variability results using data acquired in B, V, R, and I bands over a time span of about two decades. We include data from WEBT collaborators and public
    Dogra, Karan et al.

    Fecha de publicación:

    1
    2025
    Bibcode
    2025ApJS..276....1D
    Número de citas
    0
  • Con árbitro
    Calibrating the Clock of JWST
    JWST, despite not being designed to observe astrophysical phenomena that vary on rapid timescales, can be an unparalleled tool for such studies. If timing systematics can be controlled, JWST will be able to open up the subsecond infrared timescale regime. Rapid time-domain studies, such as lag measurements in accreting compact objects and solar
    Dhillon, V. S. et al.

    Fecha de publicación:

    1
    2025
    Bibcode
    2025AJ....169...21S
    Número de citas
    0