Browsing by Author "Winn, JN"

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    HD 213885b: a transiting 1-d-period super-Earth with an Earth-like composition around a bright (V=7.9) star unveiled by TESS
    (2020) Espinoza, N; Brahm Scott, Rafael; Henning, T; Jordán Colzani, Andrés Cristóbal; Dorn, C; Rojas, F; Sarkis, P; Kossakowski, D; Schlecker, M; Diaz, MR; Jenkins, JS; Aguilera-Gomez, C; Jenkins, JM; Twicken, JD; Collins, KA; Lissauer, J; Armstrong, DJ; Adibekyan, V; Barrado, D; Barros, SCC; Battley, M; Bayliss, D; Bouchy, F; Bryant, EM; Cooke, BF; Demangeon, ODS; Dumusque, X; Figueira, P; Giles, H; Lillo-Box, J; Lovis, C; Nielsen, LD; Pepe, F; Pollaco, D; Santos, NC; Sousa, SG; Udry, S; Wheatley, PJ; Turner, O; Marmier, M; Segransan, D; Ricker, G; Latham, D;; Seager, S; Winn, JN; Kielkopf, JF; Hart, R; Wingham, G; Jensen, ELN; Helminiak, Krzysztof Grzegorz; Tokovinin, A; Briceno, C; Ziegler, C; Law, NM; Mann, AW; Daylan, T; Doty, JP; Guerrero, N; Boyd, P; Crossfield, I; Morris, RL; Henze, CE; Chacon, AD
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    Mass and dust in the disk of a spiral lens galaxy
    (2003) Winn, JN; Hall, PB; Schechter, PL
    Gravitational lensing is a potentially important probe of spiral galaxy structure, but only a few cases of lensing by spiral galaxies are known. We present Hubble Space Telescope and Magellan observations of the two-image quasar PMN J2004-1349, revealing that the lens galaxy is a spiral galaxy. One of the quasar images passes through a spiral arm of the galaxy and suffers 3 mag of V-band extinction. Using simple lens models, we show that the mass quadrupole is well aligned with the observed galaxy disk. A more detailed model with components representing the bulge and disk gives a bulge-to-disk mass ratio of 0.16+/-0.05. The addition of a spherical dark halo, tailored to produce an overall. at rotation curve, does not change this conclusion.
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    TOI-954 b and K2-329 b: Short-period Saturn-mass Planets that Test whether Irradiation Leads to Inflation
    (2021) Sha, LZ; Huang, CLX; Shporer, A; Rodriguez, JE; Vanderburg, A; Brahm, R; Hagelberg, J; Matthews, EC; Ziegler, C; Livingston, JH; Stassun, KG; Wright, DJ; Crane, JD; Espinoza, N; Bouchy, F; Bakos, GA; Collins, KA; Zhou, GR; Bieryla, A; Hartman, JD; Wittenmyer, RA; Nielsen, LD; Plavchan, P; Bayliss, D; Sarkis, P; Tan, TG; Cloutier, R; Mancini, L; Jordan, A; Wang, SR; Henning, T; Narita, N; Penev, K; Teske, JK; Kane, SR; Mann, AW; Addison, BC; Tamura, M; Horner, J; Barbieri, M; Burt, JA; Diaz, MR; Crossfield, IJM; Dragomir, D; Drass, H; Feinstein, AD; Zhang, H; Hart, R; Kielkopf, JF; Jensen, ELN; Montet, BT; Ottoni, G; Schwarz, RP; Rojas Henríquez, Felipe Ignacio; Nespral, D; Torres Miranda, Pascal Jose; Mengel, MW; Udry, S; Zapata, A; Snoddy, E; Okumura, J; Ricker, GR; Vanderspek, RK; Latham, DW; Winn, JN; Seager, S; Jenkins, JM; Colon, KD; Henze, CE; Krishnamurthy, A; Ting, EB; Vezie, M; Villanueva, S
    We report the discovery of two short-period Saturn-mass planets, one transiting the G subgiant TOI-954 (TIC 44792534, V = 10.343, T = 9.78) observed in TESS sectors 4 and 5 and one transiting the G dwarf K2-329 (EPIC 246193072, V = 12.70, K = 10.67) observed in K2 campaigns 12 and 19. We confirm and characterize these two planets with a variety of ground-based archival and follow-up observations, including photometry, reconnaissance spectroscopy, precise radial velocity, and high-resolution imaging. Combining all available data, we find that TOI-954 b has a radius of 0.852(-0.062)(+0.053) R-J and a mass of 0.174(-0.017)(+0.018) M-J and is in a 3.68 day orbit, while K2-329 b has a radius of 0.774(-0.024)(+0.026) R-J and a mass if 0.260(-0.022)(+0.020) M-J and is in a 12.46 day orbit. As TOI-954 b is 30 times more irradiated than K2-329 b but more or less the same size, these two planets provide an opportunity to test whether irradiation leads to inflation of Saturn-mass planets and contribute to future comparative studies that explore Saturn-mass planets at contrasting points in their lifetimes.