Results of a chemodynamical study of the W-R ring nebula NGC 6888 around the WN6 star WR 136 are presented; the observations combine high spatial and spectral...
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PublicaciónOn the chemodynamics of Wolf-Rayet ring nebulae - NGC 6888
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PublicaciónOn the determination of temperatures of ionizing stars in H II regions
Following earlier work by Shields and Searle and by Mathis, the authors define a radiation softness parameter η = (O+/O++)(S++/S+), which they recommend as a...
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NoticiaPosible evidencia de formación planetaria en la Nebulosa de Orión
Una investigación internacional, dirigida por científicos del Instituto de Astrofísica de Canarias (IAC), ha mostrado la existencia de compuestos sólidos de...
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PublicaciónRadio and infrared structures of type I post-main sequence nebulae
High-resolution VLA radio mapping at 1.46, 4.84, and 15.0 GHz is presented together with NIR J,H,K,L, and M mapping and photometry of a broad range of type I...
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PublicaciónRadio mapping of type I post-main-sequence nebulae
Type I post-main-sequence nebulae appear to be characterised by a range of unusual, and in certain cases extreme physical characteristics, including high...
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PublicaciónSpatially resolved spectroscopy of WR ring nebulae. I - NGC 2359 and RCW 78
We report detailed spatially resolved spectroscopy of the WR nebulae NGC 2359 and RCW 78 surrounding the WN 5 HD 56925 and WN 8 HD 117688 stars. The aim of this...
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PublicaciónSpatially resolved spectroscopy of WR ring nebulae. II - M1-67
Detailed, high spatial resolution spectroscopy of the WR ring nebula M1-67 surrounding the WN 8 star WR 124 is presented. Abundances for 4 positions in M1-67...
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PublicaciónSpectroscopic study of gas outflows in the bipolar nebula S106
High resolution bidimensional optical spectroscopy in H-alpha line, N II forbidden line at 6548 and 6583 A, and S II forbidden line at 6717 and 6713 A, of the...
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PublicaciónSpectroscopy of ring nebulae around Wolf-Rayet stars in M33
We present high and low resolution spectroscopic observations for a sample of seven ring nebulae around Wolf-Rayet (WR) stars in M33: MC 27, MC 44, MC 46, MC 51...