SIMBAD references

2003A&A...398..983B - Astronomy and Astrophysics, volume 398, 983-991 (2003/2-2)

Interstellar H2 in M 33 detected with FUSE.

BLUHM H., DE BOER K.S., MARGGRAF O., RICHTER P. and WAKKER B.P.

Abstract (from CDS):

Fuse spectra of the four brightest HII regions in M 33 show absorption by interstellar gas in the Galaxy and in M 33. On three lines of sight molecular hydrogen in M 33 is detected. This is the first measurement of diffuse H2 in absorption in a Local Group galaxy other than the Magellanic Clouds. A quantitative analysis is difficult because of the low signal to noise ratio and the systematic effects produced by having multiple objects in the Fuse aperture. We use the M 33 Fuse data to demonstrate in a more general manner the complexity of interpreting interstellar absorption line spectra towards multi-object background sources. We derive H2 column densities of ≃1016 to 1017cm–2 along 3 sight lines (NGC 588, NGC 592, NGC 595). Because of the systematic effects, these values most likely represent upper limits and the non-detection of H2 towards NGC 604 does not exclude the existence of significant amounts of molecular gas along this sight line.

Abstract Copyright:

Journal keyword(s): galaxies: individual: M 33 - ISM: abundances - ISM: molecules - ultraviolet: ISM

Status at CDS:  

Simbad objects: 7

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2020.05.30-02:06:09

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