Results 111 to 120 of about 30,917 (231)

HST Time-Series Photometry of the Transiting Planet of HD 209458

, 2001
We have observed 4 transits of the planet of HD 209458 using the STIS spectrograph on HST. Summing the recorded counts over wavelength between 582 nm and 638 nm yields a photometric time series with 80 s time sampling and relative precision of about 1.1E-4 per sample.
Brown, Timothy M., Charbonneau, David, Gilliland, Ronald L., Noyes, Robert W., Burrows, Adam   +4 more
openaire   +2 more sources

Stellar Metallicities and Gradients in the Faint M31 Satellites Andromeda XVI and Andromeda XXVIII

The Astrophysical Journal
We present ∼300 stellar metallicity measurements in two faint M31 dwarf galaxies, Andromeda XVI ( M _V = −7.5) and Andromeda XXVIII ( M _V = –8.8), derived using metallicity-sensitive calcium H and K narrowband Hubble Space Telescope imaging.
Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Michelle L. M. Collins, Alessandro Savino, Michael Boylan-Kolchin, Patrick Côté, Andrew E. Dolphin, Nicolas Longeard, Mario L. Mateo, Francisco J. Mercado, Nathan R. Sandford, Evan D. Skillman   +13 more
doaj   +1 more source

Large Amplitude Photometric Variability of the Candidate Protoplanet TMR-1C

, 2010
In their HST/NICMOS observations, Terebey et al. 1998 detected a candidate protoplanet, TMR-1C, that lies at a separation of about 10" (~1000 AU) from the Class I protobinary TMR-1 (IRAS 04361+2547).
Allard, B. Riaz, Barrado y Navascués, Barrado y Navascués, Bate, Bouvier, Béjar, Caballero, Caballero, Carpenter, Carpenter, Close, Comerón, Doppmann, Ducourant, E. L. Martín, Hawkins, Kama, Kraus, Kusakabe, Luhman, Luhman, Luhman, Marley, Martín, Minniti, Park, Persson, Scholz, Scholz, Terebey, Terebey, Terebey, Winn, Zapatero Osorio, Zapatero Osorio   +35 more
core   +1 more source

Stellar Metallicities and Gradients in the Isolated, Quenched Low-mass Galaxy Tucana

The Astrophysical Journal
We measure the metallicities of 374 red giant branch (RGB) stars in the isolated, quenched dwarf galaxy Tucana using Hubble Space Telescope narrowband (F395N) calcium H and K imaging.
Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Francisco J. Mercado, Alessandro Savino, Michael Boylan-Kolchin, Patrick Côté, Andrew E. Dolphin, Nicolas Longeard, Mario L. Mateo, Jenna Samuel, Nathan R. Sandford   +12 more
doaj   +1 more source

Stellar Populations of Luminous Evolved Galaxies at z~1.5

, 2007
Observational evidence has been mounting over the past decade that at least some luminous (~2 L*) galaxies have formed nearly all of their stars within a short period of time only 1-2x10^9 years after the Big Bang.
Alan Stockton, Bolzonella M., Bower R. G., Daddi E., Elizabeth J. McGrath, Gabriela Canalizo, Moller C. S., Motohara K., Saracco P.   +8 more
core   +1 more source

HST Photometry for the Halo Stars in the Leo Elliptical NGC 3377

, 2007
40 pages, 17 ...
Harris, W. E., Harris, G. L. H., Layden, A. C., Stetson, P. B.   +3 more
openaire   +2 more sources

Deep Hubble Space Telescope Photometry of Large Magellanic Cloud and Milky Way Ultrafaint Dwarfs: A Careful Look into the Magnitude–Size Relation

The Astrophysical Journal
We present deep Hubble Space Telescope photometry of 10 targets from Treasury Program GO-14734, including six confirmed ultrafaint dwarf (UFD) galaxies, three UFD candidates, and one likely globular cluster.
Hannah Richstein, Nitya Kallivayalil, Joshua D. Simon, Christopher T. Garling, Andrew Wetzel, Jack T. Warfield, Roeland P. van der Marel, Myoungwon Jeon, Jonah C. Rose, Paul Torrey, Anna Claire Engelhardt, Gurtina Besla, Yumi Choi, Marla Geha, Puragra Guhathakurta, Evan N. Kirby, Ekta Patel, Elena Sacchi, Sangmo Tony Sohn   +18 more
doaj   +1 more source

HST Observations of Globular Clusters in M31.I:Surface Photometry of 13 Objects

, 1993
We present the initial results of a study of globular clusters in M31, using the Faint Object Camera (FOC) on the Hubble Space Telescope (HST). The sample of objects consists of 13 clusters spanning a range of properties. Three inde- pendent image deconvolution techniques were used in order to compensate for the optical problems of the HST, leading to ...
Pecci, F. Fusi, Battistini, P., Bendinelli, O., Bònoli, F., Cacciari, C., Djorgovski, S., Federici, L., Ferraro, F. R., Parmeggiani, G., Weir, N., Zavatti, F.   +10 more
openaire   +2 more sources

Characterization of the DART Ejecta Using Computer Modeling of the Ground-based and HST Photopolarimetric Data

The Planetary Science Journal
Among the published observations of the DART ejecta, we have identified a set of quasi-simultaneous data acquired on 2022 October 4–5, using different but complementary techniques: polarimetry (FORS2 at the Very Large Telescope (VLT)), spectroscopy (MUSE
Ludmilla Kolokolova, Johannes Markkanen, Quentin Ludet, Zuri Gray, Stefano Bagnulo, Cyrielle Opitom, Brian Murphy   +6 more
doaj   +1 more source

The first direct detection of a gravitational micro-lens toward the Galactic bulge

, 2007
We present a direct detection of the gravitational lens that caused the microlensing event MACHO-95-BLG-37. This is the first fully resolved microlensing system involving a source in the Galactic bulge, and the second such system in general. The lens and
A. Wood, Baraffe I., Bessell M. S., Chang K., Kozlowski S., P. R. Woźniak, Perryman M. A. C., S. Kozłowski, S. Mao, Udalski A., Wozniak P.   +10 more
core   +1 more source