The Onset of Photoionization in Post-AGB Stars

Bibcode
2002RMxAC..12..157M
Manchado, A.; Domínguez-Tagle, C.; García-Hernández, D. A.; Prada, F.; García-Lario, P.; Conway, G.
Referencia bibliográfica

Ionized Gaseous Nebulae, a Conference to Celebrate the 60th Birthdays of Silvia Torres-Peimbert and Manuel Peimbert, Mexico City, November 21-24, 2000 (Eds. W. J. Henney, J. Franco, M. Martos, & M. Peña) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 12, pp. 157-157 (2002) (http://www.astroscu.unam.mx/~rmaa/)

Fecha de publicación:
2
2002
Número de autores
6
Número de autores del IAC
1
Número de citas
0
Número de citas referidas
0
Descripción
During the post-AGB phase the dust shell detaches from the central star and dust temperatures varies between 100 and 200 K. In order to study the onset of photo-ionization in post-AGB stars, IRSPEC near-infrared spectroscopy of 40 IRAS sources from the Point Source Catalogue was conducted. In 27 of the post-AGB observed Br gamma is detected. In addition, molecular emission lines of H[2] 1-0 S(1) and 2-1 S(1) were detected in 11 objects. The observations show that all the sources but one, with molecular emission, exhibit photo-ionization. A detailed description and discussion of the results are presented.
Tipo
Sin árbitro
Materia circunestelar
Nebulosas planetarias

Te puede interesar

  • Sin árbitro
    Innovative solution for upgrading commercial bearings for use in cryogenic instruments
    Infrared instruments for astronomy require many bearings for motion that must move in cryogenic conditions. There are poor and expensive options for this, and the companies with qualified bearings only supply after a long time. To attend these constrains, the Instituto de Astrofísica de Canarias (IAC) started to develop a procedure to upgrade
    Luján, Alejandro et al.

    Fecha de publicación:

    8
    2024
    Bibcode
    2024SPIE13100E..73L
    Número de citas
    0
  • Sin árbitro
    The Gravitational-wave Optical Transient Observer (GOTO)
    The Gravitational-wave Optical Transient Observer (GOTO) is a project dedicated to identifying optical counterparts to gravitational-wave detections using a network of dedicated, wide-field telescopes. After almost a decade of design, construction, and commissioning work, the GOTO network is now fully operational with two antipodal sites: La Palma
    Dyer, Martin J. et al.

    Fecha de publicación:

    8
    2024
    Bibcode
    2024SPIE13094E..1XD
    Número de citas
    1
  • Sin árbitro
    Latest optical and mechanical upgrades in the GREGOR Infrared Spectrograph for simultaneous spectral observations
    The GREGOR Infrared Spectrograph (GRIS) can perform spectropolarimetric observations in the infrared. The spectrograph has a Czerny-Turner design and offered traditional long-slit observations since 2014. Later on, in 2018, it was upgraded with an Integral Field Unit (IFU) based on a slicer mirror, which has slicers of 100-μm width. The latter
    Regalado Olivares, S. et al.

    Fecha de publicación:

    8
    2024
    Bibcode
    2024SPIE13100E..5IR
    Número de citas
    0