Bibcode
Cox, N. L. J.; Cami, Jan; Farhang, Amin; Smoker, Jonathan; Monreal-Ibero, A.; Lallement, Rosine; Sarre, Peter J.; Marshall, Charlotte C. M.; Smith, Keith T.; Evans, Christopher J.; Royer, Pierre; Linnartz, Harold; Cordiner, Martin A.; Joblin, Christine; van Loon, Jacco Th.; Foing, Bernard H.; Bhatt, Neil H.; Bron, Emeric; Elyajouri, Meriem; de Koter, Alex; Ehrenfreund, Pascale; Javadi, Atefeh; Kaper, Lex; Khosroshadi, Habib G.; Laverick, Mike; Le Petit, Franck; Mulas, Giacomo; Roueff, Evelyne; Salama, Farid; Spaans, Marco
Referencia bibliográfica
Astronomy and Astrophysics, Volume 606, id.A76
Fecha de publicación:
10
2017
Revista
Número de citas
51
Número de citas referidas
46
Descripción
The carriers of the diffuse interstellar bands (DIBs) are largely
unidentified molecules ubiquitously present in the interstellar medium
(ISM). After decades of study, two strong and possibly three weak
near-infrared DIBs have recently been attributed to the C60^+
fullerene based on observational and laboratory measurements. There is
great promise for the identification of the over 400 other known DIBs,
as this result could provide chemical hints towards other possible
carriers. In an effort tosystematically study the properties of the DIB
carriers, we have initiated a new large-scale observational survey: the
ESO Diffuse Interstellar Bands Large Exploration Survey (EDIBLES). The
main objective is to build on and extend existing DIB surveys to make a
major step forward in characterising the physical and chemical
conditions for a statistically significant sample of interstellar
lines-of-sight, with the goal to reverse-engineer key molecular
properties of the DIB carriers. EDIBLES is a filler Large Programme
using the Ultraviolet and Visual Echelle Spectrograph at the Very Large
Telescope at Paranal, Chile. It is designed to provide an
observationally unbiased view of the presence and behaviour of the DIBs
towards early-spectral-type stars whose lines-of-sight probe the
diffuse-to-translucent ISM. Such a complete dataset will provide a deep
census of the atomic and molecular content, physical conditions,
chemical abundances and elemental depletion levels for each sightline.
Achieving these goals requires a homogeneous set of high-quality data in
terms of resolution (R 70 000-100 000), sensitivity (S/N up to 1000
per resolution element), and spectral coverage (305-1042 nm), as well as
a large sample size (100+ sightlines). In this first paper the goals,
objectives and methodology of the EDIBLES programme are described and an
initial assessment of the data is provided.
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