Results 51 to 60 of about 30,917 (231)

The Globular Cluster System in the Inner Region of the Giant Elliptical Galaxy NGC 4472 [PDF]

, 2000
We present a study of globular clusters in the inner region of the giant elliptical galaxy NGC 4472, based on the HST WFPC2 archive data. We have found about 1560 globular cluster candidates at the galactocentric radius r < 4 arcmin.
Eunhyeuk Kim, Murali C., Murali C., Murali C., Myung Gyoon Lee   +4 more
core   +3 more sources

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

Photometry and spectroscopy of faint candidate spectrophotometric standard DA white dwarfs [PDF]

, 2019
We present precise photometry and spectroscopy for 23 candidate spectrophotometric standard white dwarfs. The selected stars are distributed in the Northern hemisphere and around the celestial equators and are all fainter than r ~ 16.5 mag.
Axelrod, T., Bohlin, R., Calamida, A., Claver, J., Deustua, S., Holberg, J., Hubeny, I., Mackenty, J., Matheson, T., Narayan, G., Olszewski, E., Points, S., Rest, A., Sabbi, E., Saha, A., Shanahan, C., Stubbs, C. W.   +16 more
core   +2 more sources

Stochastic 2-D Galaxy disk Evolution Models. Resolved Stellar Populations in the Galaxy M33

Open Astronomy, 2015
We improved the stochastic 2-D galaxy disk models (Mineikis & Vansevičius 2014a) by introducing enriched gas outflows from galaxies and synthetic color-magnitude diagrams of stellar populations.
Mineikis T., Vansevičius V.
doaj   +1 more source

Optical Identification of Cepheids in 19 Host Galaxies of Type Ia Supernovae and NGC 4258 with the Hubble Space Telescope [PDF]

, 2016
We present results of an optical search for Cepheid variable stars using the Hubble Space Telescope (HST) in 19 hosts of Type Ia supernovae (SNe Ia) and the maser-host galaxy NGC 4258, conducted as part of the SH0ES project (Supernovae and H0 for the ...
Amanullah, Rahman, Casertano, Stefano, Chornock, Ryan, Filippenko, Alexei V., Foley, Ryan J., Goobar, Ariel, Hoffmann, Samantha L., Macri, Lucas M., Riess, Adam G., Silverman, Jeffrey M., Tucker, Brad E., Welch, Douglas L., Yuan, Wenlong   +12 more
core   +3 more sources

Mid-Cycle Changes in Eta Carinae

, 2010
In late 2006, ground-based photometry of $\eta$ Car plus the Homunculus showed an unexpected decrease in its integrated apparent brightness, an apparent reversal of its long-term brightening.
Altamore, Andrea Mehner, Biretta, Cassatella, Corcoran, Davidson, Davidson, Davidson, Davidson, Davidson, Feinstein, Feinstein, Fernandez-Lajus, Hillier, Hillier, Hofmann, Humphreys, Humphreys, Ishibashi, John C. Martin, Kashi, Kashi, Koornneef, Kris Davidson, Martin, Martin, Martin, Martin, Mattei, Mehner, Nielsen, Osterbrock, Pian, Roberta M. Humphreys, Smith, Smith, Soker, Sterken, van Genderen, Weigelt   +39 more
core   +1 more source

The Age of the Inner Halo Globular Cluster NGC 6652 [PDF]

, 2000
HST (V,I) photometry has been obtained for the inner halo globular cluster NGC 6652. The photometry reaches approximately 4 mag below the turn-off and includes a well populated horizontal branch.
Ata Sarajedini, Bessell M. S., Brian Chaboyer, Carretta E., Chaboyer B., Ferraro F. R., Kaluzny J., Ortolani S., Salaris M., Taft E. Armandroff, Weiss A.   +10 more
core   +3 more sources

Hubble Space Telescope Spectroscopy of Brown Dwarfs Discovered with the Wide-field Infrared Survey Explorer [PDF]

, 2015
We present a sample of brown dwarfs identified with the {\it Wide-field Infrared Survey Explorer} (WISE) for which we have obtained {\it Hubble Space Telescope} ({\it HST}) Wide Field Camera 3 (WFC3) near-infrared grism spectroscopy.
Cushing, Michael C., Eisenhardt, Peter R., Gelino, Christopher R., Griffith, Roger L., Kirkpatrick, J. Davy, Mace, Gregory N., Marsh, Kenneth A., Schneider, Adam C., Skrutskie, M. F., Wright, Edward L.   +9 more
core   +4 more sources

Photometric Confirmation of MACHO Large Magellanic Cloud Microlensing Events

, 2005
We present previously unpublished photometry of three Large Magellanic Cloud (LMC) microlensing events and show that the new photometry confirms the microlensing interpretation of these events.
Andrew C. Becker, Ansari R., Austin Tomaney, Beaulieu J. P., Cook K., David P. Bennett, della Valle M., Lasserre T., Udalski A., Udalski A., Woniak P. R.   +10 more
core   +1 more source

Photometric catalog of nearby globular clusters (I) [PDF]

, 2000
We present the first part of the first large and homogeneous CCD color-magnitude diagram (CMD) data base, comprising 52 nearby Galactic globular clusters (GGC) imaged in the V and I bands using only two telescopes (one for each hemisphere).
Aparicio, A., Piotto, G., Rosenberg, A., Saviane, I.   +3 more
core   +3 more sources