https://phys.org/news/2020-04-rotating-galaxies-galore-results-alpine.html Rotating galaxies galore: New results from ALPINE reveal what appear to be spiral galaxies in the infant universe by Whitney Clavin, California Institute of Technology Please Register or Log in to view the hidden image! New results from an ambitious sky survey program, called ALPINE, reveal that rotating disk-shaped galaxies may have existed in large numbers earlier in the universe than previously thought. The ALPINE program, formally named "ALMA Large Program to Investigate C+ at Early Times," uses data obtained from 70 hours of sky observations with the ALMA observatory (Atacama Large Millimeter/submillimeter Array) in Chile, in combination with data from previous observations by a host of other telescopes, including the W. M. Keck Observatory in Hawaii and NASA's Hubble and Spitzer space telescopes. Specifically, the survey looked at a patch of sky containing dozens of remote galaxies. more at link................ the paper: https://iopscience.iop.org/article/10.3847/1538-4365/ab7ccd The ALPINE–ALMA [C ii] Survey: Multiwavelength Ancillary Data and Basic Physical Measurements: Abstract We present the ancillary data and basic physical measurements for the galaxies in the ALMA Large Program to Investigate C+ at Early Times (ALPINE) survey—the first large multiwavelength survey that aims at characterizing the gas and dust properties of 118 main-sequence galaxies at redshifts 4.4 < z < 5.9 via the measurement of [Please Register or Log in to view the hidden image!] emission at Please Register or Log in to view the hidden image! (64% at >3.5σ) and the surrounding far-infrared continuum in conjunction with a wealth of optical and near-infrared data. We outline in detail the spectroscopic data and selection of the galaxies as well as the ground- and space-based imaging products. In addition, we provide several basic measurements including stellar masses, star formation rates (SFR), rest-frame ultra-violet (UV) luminosities, UV continuum slopes (β), and absorption line redshifts, as well as Hα emission derived from Spitzer colors. We find that the ALPINE sample is representative of the 4 < z < 6 galaxy population selected by photometric methods and only slightly biased toward bluer colors (Δβ ~ 0.2). Using [Please Register or Log in to view the hidden image!] as tracer of the systemic redshift (confirmed for one galaxy at z = 4.5 out of 118 for which we obtained optical [Please Register or Log in to view the hidden image!]λ3727Å emission), we confirm redshifted Lyα emission and blueshifted absorption lines similar to findings at lower redshifts. By stacking the rest-frame UV spectra in the [Please Register or Log in to view the hidden image!] rest frame, we find that the absorption lines in galaxies with high specific SFR are more blueshifted, which could be indicative of stronger winds and outflows.
