We have obtained an image of the candidate protogalaxy MS 1512-cB58 through a narrow passband filter centered on Hα redshifted to z = 2.72. MS 1512-cB58 shows excess emission that is spatially extended, has a rest equivalent width of 56.7 Å, and luminosity of 3 × 1043 h−275 ergs s-1 (q0 = 0.1). Assuming that the excess emission arises from nebular Hα associated with H II regions, the observed luminosity implies a star formation rate of 285 M☉ yr-1 (neglecting any possible magnification by gravitational lensing). By comparison, the luminosity of the stellar continuum at 1500 Å, along with models for the spectral energy distribution, indicate a star formation rate about a factor of 12 greater. We discuss plausible explanations for this discrepancy and possible future observations that may clarify the situation.
We have derived star formation rates (SFRs), gas-phase oxygen abundances and effective dust absorption optical depths for a sample of galaxies drawn from the Stromlo—APM redshif...
We present observations of SDSSp J104433.04--012502.2, a luminous quasar at z=5.80 discovered from Sloan Digital Sky Survey (SDSS) multicolor imaging data. This object was selec...
We present deep photometry obtained with the HST in an outer LMC field. A well-defined main sequence is seen down to V > 26. We derive a luminosity function from the data and...
We present a simulation of the spatial, luminosity and spectral distributions of four types of stellar objects. We simulate: (1) Galactic stars, based on a Galactic structure mo...
view Abstract Citations (1562) References (242) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Pre-Main-Sequence Evolution in the Taurus-Auriga...
Social media, news, blog, policy document mentions