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Hola, he encontrado en un archivo el espectro de una supernova. Me gustaría que me ayudáseis a entender qué significa lo que aparece en el grafico y si tiene algún significado en cuanto a energía oscura o aceleración de la expansión. (el grafico está sacado de: http://arxiv.org/PS_cache/astro-ph/p.../9712212v1.pdf pág 13)
El pie de grafico dice lo siguiente (está en inglés):
Spectrum of SN 1997ap, after binning by 12.5 °A, placed within a time series of spectra of “normal” SNe Ia 17,18,19,20,21 (the spectrum of SN 1993O was provided courtesy of the Caltán/Tololo Supernova Survey), as they would appear redshifted to z = 0.83. The spectra show the evolution of spectral features between 7 restframe days before and 2 days after restframe B-band maximum light. SN 1997ap matches best at 2 ± 2 days before maximum light. The symbol indicates an atmospheric absorption line and * indicates a
region affected by night sky line subtraction residuals. The redshift of z = 0.83 ± 0.005 was determined from the supernova spectrum itself, since there are no host galaxy lines detected.
Muchas gracias!
Imagen:
El pie de grafico dice lo siguiente (está en inglés):
Spectrum of SN 1997ap, after binning by 12.5 °A, placed within a time series of spectra of “normal” SNe Ia 17,18,19,20,21 (the spectrum of SN 1993O was provided courtesy of the Caltán/Tololo Supernova Survey), as they would appear redshifted to z = 0.83. The spectra show the evolution of spectral features between 7 restframe days before and 2 days after restframe B-band maximum light. SN 1997ap matches best at 2 ± 2 days before maximum light. The symbol indicates an atmospheric absorption line and * indicates a
region affected by night sky line subtraction residuals. The redshift of z = 0.83 ± 0.005 was determined from the supernova spectrum itself, since there are no host galaxy lines detected.
Muchas gracias!
Imagen:
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