Browsing by Author "Krone-Martins, Alberto"

Now showing items 1-5 of 5

    • From Images to Features: Unbiased Morphology Classification via Variational Auto-Encoders and Domain Adaptation 

      Xu, Quanfeng; Shen, Shiyin; Souza, Rafael S. de; Chen, Mi; Ye, Renhao; She, Yumei; Chen, Zhu; Ishida, Emille E. O.; Krone-Martins, Alberto; Durgesh, Rupesh (2023-10-17)
      We present a novel approach for the dimensionality reduction of galaxy images by leveraging a combination of variational auto-encoders (VAE) and domain adaptation (DA). We demonstrate the effectiveness of this approach ...

    • Gaia GraL: Gaia DR2 gravitational lens systems – VIII. A radio census of lensed systems 

      Dobie, Dougal; Sluse, Dominique; Deller, Adam; Murphy, Tara; Krone-Martins, Alberto; Stern, Daniel; Wang, Ziteng; Wang, Yuanming; Bœhm, Céline; Djorgovski, S G; Galluccio, Laurent; Delchambre, Ludovic; Connor, Thomas; den Brok, Jakob Sebastiaan; Do Vale Cunha, Pedro H; Ducourant, Christine; Graham, Matthew J; Jalan, Priyanka; Klioner, Sergei A; Klüter, Jonas; Mignard, François; Negi, Vibhore; Petit, Quentin; Scarano Sergio, Jr; Slezak, Eric; Surdej, Jean; Teixeira, Ramachrisna; Walton, Dominic J; Wambsganss, Joachim (2024-03-01)
      We present radio observations of 24 confirmed and candidate strongly lensed quasars identified by the Gaia Gravitational Lenses working group. We detect radio emission from eight systems in 5.5 and 9 GHz observations with ...

    • Gaia GraL: Gaia DR2 Gravitational Lens Systems. VII. XMM-Newton Observations of Lensed Quasars 

      Connor, Thomas; Stern, Daniel; Krone-Martins, Alberto; Djorgovski, S. G.; Graham, Matthew J.; Walton, Dominic J.; Delchambre, Ludovic; Ducourant, Christine; Teixeira, Ramachrisna; Campion, Jean-François Le; Brok, Jakob Sebastian den; Dobie, Dougal; Galluccio, Laurent; Jalan, Priyanka; Klioner, Sergei A.; Klüter, Jonas; Mahabal, Ashish A.; Negi, Vibhore; Nierenberg, Anna; Petit, Quentin; Jr, Sergio Scarano; Slezak, Eric; Sluse, Dominique; Spíndola-Duarte, Carolina; Surdej, Jean; Wambsganss, Joachim (2022-03-03)
      We present XMM-Newton X-ray observations of nine confirmed lensed quasars at 1 ≲ z ≲ 3 identified by the Gaia Gravitational Lens program. Eight systems are strongly detected, with 0.3-8.0 keV fluxes F 0.3-8.0 ≳ 5 ×10-14 ...

    • A graph-based spectral classification of Type II supernovae 

      de Souza, Rafael S.; Thorp, Stephen; Galbany, Lluis; Ishida, Emille E.~O.; González-Gaitán, Santiago; Schmitz, Morgan A.; Krone-Martins, Alberto; Peters, Christina (2023-06-06)
      Given the ever-increasing number of time-domain astronomical surveys, employing robust, interpretative, and automated data-driven classification schemes is pivotal. Based on graph theory, we present new data-driven ...

    • Spectroscopic Confirmation of a Population of Isolated, Intermediate-mass Young Stellar Objects 

      Kuhn, Michael A.; Saber, Ramzi; Povich, Matthew S.; de Souza, Rafael S.; Krone-Martins, Alberto; Ishida, Emille E.~O.; Zucker, Catherine; Benjamin, Robert A.; Hillenbrand, Lynne A.; Castro-Ginard, Alfred; Zhou, Xingyu; Collaboration, COIN (2023-01-31)
      Wide-field searches for young stellar objects (YSOs) can place useful constraints on the prevalence of clustered versus distributed star formation. The Spitzer/IRAC Candidate YSO (SPICY) catalog is one of the largest ...