Browsing by Author "Villanueva, S."

Now showing 1 - 5 of 5
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    Human mesenchymal stem cells derived from adipose tissue reduce functional and tissue damage in a rat model of chronic renal failure.
    (2013) Villanueva, S.; Céspedes Fierro, Carlos Mauricio.; Sáez Pedraza, Pablo José; Vio Lagos, Carlos P.
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    Inhibition of bFGF-receptor type 2 increases kidney damage and suppresses nephrogenic protein expression after ischemic acute renal failure
    (2008) Villanueva, S.; Céspedes Fierro, Carlos Mauricio.; González Parra, Alexis Antonio.; Roessler Barrón, Eric; Vio Lagos, Carlos P.
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    Mesenchymal stem cell injection ameliorates chronic renal failure in a rat model
    (2011) Villanueva, S.; Céspedes Fierro, Carlos Mauricio.; Sáez Pedraza, Pablo José; Vio Lagos, Carlos P.
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    TOI-222: a single-transit TESS candidate revealed to be a 34-d eclipsing binary with CORALIE, EulerCam, and NGTS
    (2019) Lendl, M.; Bouchy, F.; Gill, S.; Nielsen, L. D.; Turner, O.; Stassun, K.; Acton, J. S.; Anderson, D. R.; Armstrong, D. J.; Bayliss, D.; Belardi, C.; Bryant, E. M.; Burleigh, M. R.; Chaushev, A.; Casewell, S. L.; Cooke, B. F.; Eigmüller, P.; Gillen, E.; Goad, M. R.; Gunther, M. N.; Hagelberg, J.; Jenkins, J. S.; Louden, T.; Marmier, M.; McCormac, J.; Moyano, M.; Pollacco, D.; Raynard, L.; Tilbrook, R. H.; Udry, S.; Vines, J. I.; West, R. G.; Wheatley, P. J.; Ricker, G.; Vanderspek, R.; Latham, D. W.; Seager, S.; Winn, J.; Jenkins, J. M.; Addison, B.; Briceño, C.; Brahm, R.; Caldwell, D. A.; Doty, J.; Espinoza, N.; Goeke, B.; Henning, T.; Jordán, A.; Krishnamurthy, A.; Law, N.; Morris, R.; Okumura, J.; Mann, A. W.; Rodriguez, J. E.; Sarkis, P.; Schlieder, J.; Twicken, J. D.; Villanueva, S.; Wittenmyer, R. A.; Wright, D. J.; Ziegle, C.
    We report the period, eccentricity, and mass determination for the Transiting Exoplanet Survey Satellite (TESS) single-transit event candidate TOI-222, which displayed a single 3000 ppm transit in the TESS 2-min cadence data from Sector 2. We determine the orbital period via radial velocity measurements (P = 33.9 d), which allowed for ground-based photometric detection of two subsequent transits. Our data show that the companion to TOI-222 is a low-mass star, with a radius of $0.18_{-0.10}^{+0.39}$ R⊙ and a mass of 0.23 ± 0.01 M⊙. This discovery showcases the ability to efficiently discover long-period systems from TESS single-transit events using a combination of radial velocity monitoring coupled with high-precision ground-based photometry.
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    Two long-period transiting exoplanets on eccentric orbits: NGTS-20 b (TOI-5152 b) and TOI-5153 b
    (2022) Ulmer-Moll, S.; Lendl, M.; Gill, S.; Villanueva, S.; Hobson, M. J.; Bouchy, F.; Brahm, R.; Dragomir, D.; Grieves, N.; Mordasini, C.; Anderson, D. R.; Acton, J. S.; Bayliss, D.; Bieryla, A.; Burleigh, M. R.; Casewell, S. L.; Chaverot, G.; Eigmueller, P.; Feliz, D.; Gaudi, B. S.; Gillen, E.; Goad, M. R.; Gupta, A. F.; Gunther, M. N.; Henderson, B. A.; Henning, T.; Jenkins, J. S.; Jones, M.; Jordan, A.; Kendall, A.; Latham, D. W.; Mireles, I; Moyano, M.; Nadol, J.; Osborn, H. P.; Pepper, J.; Pinto, M. T.; Psaridi, A.; Queloz, D.; Quinn, S.; Rojas, F.; Sarkis, P.; Schlecker, M.; Tilbrook, R. H.; Torres, P.; Trifonov, T.; Udry, S.; Vines, J., I; West, R.; Wheatley, P.; Yao, X.; Zhao, Y.; Zhou, G.
    Context. Long-period transiting planets provide the opportunity to better understand the formation and evolution of planetary systems. Their atmospheric properties remain largely unaltered by tidal or radiative effects of the host star, and their orbital arrangement reflects a different and less extreme migrational history compared to close-in objects. The sample of long-period exoplanets with well-determined masses and radii is still limited, but a growing number of long-period objects reveal themselves in the Transiting Exoplanet Survey Satellite (TESS) data.