Article

 

VARIABILITY OF THE EMISSION LINE FLUXES AND RATIOS OF HH 1/2 Public Deposited

https://scholar.colorado.edu/concern/articles/8c97kq95r
Abstract
  • Comparamos datos espectrofotom´etricos obtenidos en 1978 (por Brugel et al. 1981a) con los flujos de l´ıneas de emisi´on de im´agenes calibradas obtenidas con el Hubble Space Telescope (HST) en 1994 y 2014. Esta comparaci´on muestra que los cocientes de l´ıneas de emisi´on de estos objetos se han mantenido sorprendentemente invariantes durante los ´ultimos 36 a˜nos. Por otro lado, las intensidades de las l´ıneas s´ı han cambiado, y muestran un incremento por un factor de ≈ 4 para HH 2, y un decremento de ≈ 30% para HH 1. Estos resultados apoyan la idea de que HH 1 y 2 son cabezas de jets densos, viajando en un medio ambiente con densidad decreciente (para HH 1) o creciente (para HH 2). ABSTRACT We compare spectrophotometric data of HH 1 and 2 obtained in 1978 (by Brugel et al. 1981a) with the emission line fluxes from calibrated Hubble Space Telescope (HST) images obtained in 1994 and 2014. This comparison shows that the emission line ratios of these objects have remained surprisingly invariant during the past 36 years. On the other hand, the line intensities have indeed changed, with HH 2 brightening by a factor of ≈ 4 and HH 1 becoming ≈ 30% fainter. These results would be consistent with HH 1 and 2 being leading working surfaces of heavy jets travelling into an environment of decreasing (for HH 1) or increasing (HH 2) densities.
Creator
Date Issued
  • 2016-06-07
Academic Affiliation
Journal Title
Journal Volume
  • 52
File Extent
  • 347-355
Subject
Last Modified
  • 2019-12-05
Resource Type
Rights Statement
ISSN
  • 0185-1101
Language

Relationships

Items