SIMBAD references

2009ApJ...692..502V - Astrophys. J., 692, 502-510 (2009/February-2)

Examining dust grain models using the reddening and X-ray dust halo of Terzan 2.

VALENCIC L.A., SMITH R.K., DWEK E., GRAESSLE D. and DAME T.M.

Abstract (from CDS):

We use the X-ray dust halo of the low-mass X-ray binary 4U 1724-307, located in the globular cluster Terzan 2, to probe the interstellar medium along this line of sight (LOS). The X-ray dust halo arises from X-rays scattering off of interstellar dust grains. Using a low optical depth sight line to determine the Chandra ACIS point-spread function, we extracted the radial profile as a function of energy and used it to determine the H column density (NH) and cloud location along the LOS for several dust grain models, including the commonly-used models of MRN and WD. The resulting NH values were used to determine the reddening E(B - V), which was then compared with the average E(B - V) for this sight line found by other workers. We found that for this LOS, only the ZDA BARE-AC-S, BARE-GR-FG, and BARE-GR-S models yield reddenings within 1σ of the literature average.

Abstract Copyright:

Journal keyword(s): dust, extinction - globular clusters: individual: Terzan 2 - X-rays: ISM

Simbad objects: 11

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2020.09.19-11:37:16

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