Browsing University of Hertfordshire by Author "Galván-Madrid, Roberto"

Now showing items 1-5 of 5

    • A 1.3 mm SMA Survey of 29 Variable Young Stellar Objects 

      Liu, Hauyu Baobab; Dunham, Michael M.; Pascucci, Ilaria; Bourke, Tyler L.; Hirano, Naomi; Longmore, Steven; Andrews, Sean; Carrasco-González, Carlos; Forbrich, Jan; Galván-Madrid, Roberto; Girart, Josep M.; Green, Joel D.; Juárez, Carmen; Kóspál, Ágnes; Manara, Carlo Felice; Palau, Aina; Takami, Michihiro; Testi, Leonardo; Vorobyov, Eduard I. (2018-04-01)
      Context. Young stellar objects (YSOs) may undergo periods of active accretion (outbursts), during which the protostellar accretion rate is temporarily enhanced by a few orders of magnitude. Whether or not these accretion ...

    • Cloud Structure of Three Galactic Infrared Dark Star-forming Regions from Combining Ground- and Space-based Bolometric Observations 

      Lin, Yuxin; Liu, Hauyu Baobab; Dale, James E.; Li, D.; Busquet, Gemma; Zhang, Zhi Yu; Ginsburg, Adam; Galván-Madrid, Roberto; Kovács, Attila; Koch, Eric; Qian, Lei; Wang, Ke; Longmore, Steve; Chen, Huei Ru; Walker, Daniel (2017-05-02)
      We have modified the iterative procedure introduced by Lin et al., to systematically combine the submillimeter images taken from ground-based (e.g., CSO, JCMT, APEX) and space (e.g., Herschel, Planck) telescopes. We applied ...

    • Constraints on photoevaporation models from (lack of) radio emission in the Corona Australis protoplanetary disks 

      Galván-Madrid, Roberto; Liu, Hauyu Baobab; Manara, Carlo Felice; Forbrich, Jan; Pascucci, Ilaria; Carrasco-González, Carlos; Goddi, Ciriaco; Hasegawa, Yasuhiro; Takami, Michihiro; Testi, Leonardo (2014-10-21)
      Photoevaporation due to high-energy stellar photons is thought to be one of the main drivers of protoplanetary disk dispersal. The fully or partially ionized disk surface is expected to produce free-free continuum emission ...

    • Molecular Cloud Evolution VI. Measuring cloud ages 

      Vázquez-Semadeni, Enrique; Zamora-Avilés, Manuel; Galván-Madrid, Roberto; Forbrich, Jan (2018-09-21)
      In previous contributions, we have presented an analytical model describing the evolution and star formation rate (SFR) of molecular clouds (MCs) undergoing hierarchical gravitational contraction. The cloud’s evolution is ...

    • Thermal Feedback in the High-mass Star- and Cluster-forming Region W51 

      Ginsburg, Adam; Goddi, Ciriaco; Kruijssen, J. M.Diederik; Bally, John; Smith, Rowan; Galván-Madrid, Roberto; Mills, Elisabeth A.C.; Wang, Ke; Dale, James E.; Darling, Jeremy; Rosolowsky, Erik; Loughnane, Robert; Testi, Leonardo; Bastian, Nate (2017-06-16)
      High-mass stars have generally been assumed to accrete most of their mass while already contracted onto the main sequence, but this hypothesis has not been observationally tested. We present ALMA observations of a 3 × 1.5 ...