Astrophysical: Radial velocity

  • Publication
    Dynamical evidence for a black hole in the x-ray transient QZ VUL (=GS 2000+25)
    We report the spectroscopic detection of the secondary star in the x-ray transient QZ Vul (=GS 2000+25). Cross-correlation of individual spectra against K-type...
  • Publication
    Effect of atmospheric extinction on solar radial velocity measurements
    Effects of differential extinction across the Earth's atmosphere on astronomical photometry are reviewed. Under the same circumstances when a rotating extended...
  • Publication
    Effects of interstellar absorptions on MG II chromospheric emissions
    The Mg II chromospheric emissions in cool stars were analyzed using high resolution IUE archive spectra. The ways in which interstellar (IS) absorptions can...
  • Publication
    Geometry of the Draco C1 Symbiotic Binary
    Draco C1 is a known symbiotic binary star system composed of a carbon red giant and a hot, compact companion—likely a white dwarf—belonging to the Draco dwarf...
  • Publication
    Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy
    Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres of terrestrial planets via follow-up...
  • Publication
    Global acoustic oscillations on Alpha Bootis
    A two-week time series of precise radial velocity measurements of Alpha Bootis (Arcturus) covering 7-8 hr per night is reported. The radial barycentric velocity...
  • Publication
    H II region spectroscopy and two dimensional stellar photometry of the barred Seyfert NGC 1566
    Radial velocities of 14 H II regions were obtained using reticon spectroscopy at H-alpha for the barred spiral NGC 1566. The same spectra also yield N II/H and...
  • Publication
    Hyades Member K2-136c: The Smallest Planet in an Open Cluster with a Precisely Measured Mass
    K2-136 is a late-K dwarf (0.742 ± 0.039 M ⊙) in the Hyades open cluster with three known, transiting planets and an age of 650 ± 70 Myr. Analyzing K2 photometry...
  • News
    IAC scientists complete an unprecedented study of the masses of over 500 clusters of galaxies
    A team of researchers from the cosmology group at the Instituto de Astrofísica de Canarias has obtained one of the most accurate measurements of the masses of...