28,072 research outputs found
A spectrophotometric catalogue of HII galaxies
We present a spectrophotometric catalogue of 90 emission-line galaxies (ELGs)
discovered during an objective - prism survey that aimed to search for dwarf
galaxies within the voids (Popescu et al. 1996, 1998). The paper presents line
ratios, equivalent widths and absolute fluxes for the emission-lines seen in
the spectra of the galaxies. A list of newly discovered Wolf-Rayet galaxies is
presented. Many objects included in the catalogue have low metallicity and the
extreme cases are proposed as candidates for very low metallicity galaxies.Comment: 14 pages, to appear in Astronomy and Astrophysics Suppl. Serie
EXPERIMENTAL INVESTIGATION OF INTERACTIONS IN WILLINGNESS TO PAY FOR CERTIFIED ORGANIC AND NON-GENETICALLY MODIFIED FOODS
Consumer/Household Economics,
Small-mass effects in heavy-to-light form factors
We present the heavy-to-light form factors with two different non-vanishing
masses at next-to-next-to-leading order and study its expansion in the small
mass. The leading term of this small-mass expansion leads to a factorized
expression for the form factor. The presence of a second mass results in a new
feature, in that the soft contribution develops a factorization anomaly. This
cancels with the corresponding anomaly in the collinear contribution. With the
generalized factorization presented here, it is possible to obtain the leading
small-mass terms for processes with large masses, such as muon-electron
scattering, from the corresponding massless amplitude and the soft
contribution.Comment: 20 pages, 4 figures, 1 ancillary file, published versio
- …