Results 121 to 130 of about 53,340 (257)

Water Absorption in the Transmission Spectrum of the Water World Candidate GJ 9827 d

The Astrophysical Journal Letters, 2023
Recent work on the characterization of small exoplanets has allowed us to accumulate growing evidence that sub-Neptunes with radii greater than ∼2.5 R _⊕ often host H _2 /He-dominated atmospheres both from measurements of their low bulk densities and ...
Pierre-Alexis Roy, Björn Benneke, Caroline Piaulet, Michael A. Gully-Santiago, Ian J. M. Crossfield, Caroline V. Morley, Laura Kreidberg, Thomas Mikal-Evans, Jonathan Brande, Simon Delisle, Thomas P. Greene, Kevin K. Hardegree-Ullman, Travis Barman, Jessie L. Christiansen, Diana Dragomir, Jonathan J. Fortney, Andrew W. Howard, Molly R. Kosiarek, Joshua D. Lothringer   +18 more
doaj   +1 more source

Star Cluster Candidates in M81

, 2010
We present a catalog of extended objects in the vicinity of M81 based a set of 24 Hubble Space Telescope Advanced Camera for Surveys (ACS) Wide Field Camera (WFC) F814W (I-band) images. We have found 233 good globular cluster candidates; 92 candidate HII
Brian McLeod, Chandar, Chandar, Chandar, de Vaucouleurs, Driver, Freedman, Jay Strader, Jean P. Brodie, John P. Huchra, Julie B. Nantais, Okoń, Riess, Schröder   +13 more
core   +1 more source

HST Observations of Young Stellar Clusters in Nearby Galaxies [PDF]

arXiv, 2003
The HST data archive contains images of several nearby spirals, suitable for detailed studies of the properties of individual star clusters and their surroundings. By combining structural information derived from HST images with ground-based photometry, it is possible to study cluster properties as a function of age and mass.
arxiv  

The Progenitor of Supernova 2011dh Has Vanished [PDF]

, 2013
We conducted Hubble Space Telescope (HST) Snapshot observations of the Type IIb Supernova (SN) 2011dh in M51 at an age of ~641 days with the Wide Field Camera 3.
Cenko, S. Bradley, Clubb, Kelsey I., Filippenko, Alexei V., Fox, Ori D., Ganeshalingam, Mohan, Kelly, Patrick L., Shivvers, Isaac, Smith, Nathan, Van Dyk, Schuyler D., Zheng, WeiKang   +9 more
core   +2 more sources

HST-NICMOS Color Transformations and Photometric Calibrations [PDF]

, 1999
This paper presents color transformations for HST NICMOS camera 2 observations to the ground-based CIT/CTIO photometric system, using observations of nineteen moderately bright, red stars in Baade's window in the color range 0.7 < (J-K) < 1.6. We estimate an extension of the transformation to 0.4 < (J-K) < 3.0 with five standards observed by STScI ...
arxiv   +1 more source

The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample [PDF]

, 2011
We present ACS, NICMOS, and Keck AO-assisted photometry of 20 Type Ia supernovae SNe Ia from the HST Cluster Supernova Survey. The SNe Ia were discovered over the redshift interval 0.623 < z < 1.415.
A. Dey, A. Goobar, A. Gude, A. H. Gonzalez, A. S. Fruchter, A. Spadafora, Albrecht, Amanullah, B. Koester, Barbary, Barbary, Barbary, Barker, Beckwith, Blakeslee, Bohlin, Bohlin, Bohlin, Bohringer, Bouwens, Brodwin, Bundy, C. Lidman, C. Mullis, Conley, Contreras, D. G. Gilbank, D. J. Schlegel, D. Johnston, D. Rubin, D. Stern, Dahlen, Dawson, de Jong, Doi, Dunkley, E. Ellingson, E. Hsiao, E. V. Linder, Eisenhardt, Eisenstein, F. Munshi, G. Aldering, G. Goldhaber, Garnavich, Gilbank, Gladders, H. Hoekstra, H. K. C. Yee, H. K. Fakhouri, Hamuy, Heyer, Hicken, Hicken, Hilton, Hilton, Holtzman, Hsiao, Hsiao, Huang, J. Botyanszki, J. Melbourne, J. Meyers, J. Rhodes, Jee, Jee, K. Barbary, K. Konishi, K. S. Dawson, K. Tokita, Kaiser, Kelly, Kessler, Knop, Koekemoer, Komatsu, Kowalski, Kuznetsova, L. F. Barrientos, L. Faccioli, L. Lubin, L. Wang, Lampeitl, Liddle, M. Brodwin, M. D. Gladders, M. Doi, M. Donahue, M. J. Jee, M. Kowalski, M. Postman, M. Strovink, M. Wagner, Mei, Melbourne, Melbourne, Meyers, Miknaitis, Mobasher, Morokuma, N. Connolly, N. Kashikawa, N. Panagia, N. Suzuki, N. Takanashi, N. Yasuda, Navarro, P. Eisenhardt, P. Ripoche, P. Rosati, Peng, Perlmutter, Postman, R. Amanullah, Riess, Riess, Riess, Riess, Riess, Riess, Riess, Ripoche, Rosati, S. A. Stanford, S. Deustua, S. Perlmutter, Sand, Schlegel, Schmidt, Smith, Spergel, Sullivan, T. Hattori, T. Morokuma, T. Oda, T. Pritchard, Tremonti, V. Fadeyev, V. Stanishev, Wood-Vasey, X. Huang, Y. Ihara   +141 more
core   +5 more sources

Supernova Remnants and the Interstellar Medium of M83: Imaging & Photometry with WFC3 on HST

, 2010
We present Wide Field Camera 3 images taken with the Hubble Space Telescope within a single field in the southern grand design star-forming galaxy M83. Based on their size, morphology and photometry in continuum-subtracted H$ $, [\SII], H$ $, [\OIII] and [\OII] filters, we have identified 60 supernova remnant candidates, as well as a handful of young
Dopita, Michael A., Blair, William P., Long, Knox S., Mutchler, Max, Whitmore, Bradley C., Kuntz, Kip D., Balick, Bruce, Bond, Howard E., Calzetti, Daniela, Carollo, Marcella, Disney, Michael, Frogel, Jay A., O'Connell, Robert, Hall, Donald, Holtzman, Jon A., Kimble, Randy A., MacKenty, John, McCarthy, Patrick, Paresce, Francesco, Saha, Abhijit, Silk, Joe, Sirianni, Marco, Trauger, John, Walker, Alistair R., Windhorst, Rogier, Young, Erick   +25 more
openaire   +2 more sources

Star formation histories of resolved galaxies [PDF]

, 2007
The impact of HST photometry and European astronomy in studies concerning the star formation histories of resolved galaxies is described. Our current knowledge of the star formation history of systems within 10-20 Mpc, as derived from the colour-magnitude diagrams of their resolved stellar populations, is reviewed, as well as the impact of these ...
arxiv   +1 more source

The Solar Neighborhood XXXI: Discovery of an Unusual Red+White Dwarf Binary at ~25 Parsecs via Astrometry and UV Imaging

, 2013
We report the discovery of a nearby M5.0V dwarf at 24.6 pc, SCR 1848-6855, that is orbited by an unusual companion causing an astrometric perturbation of more than 200 milli-arcseconds.
Gies, Douglas R., Henry, Todd J., Ianna, Philip A., Jao, Wei-Chun, Riedel, Adric R., Subasavage, John P., Winters, Jennifer G.   +6 more
core   +1 more source

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