Results 61 to 70 of about 30,917 (231)

Probing the Outskirts of an Extrasolar Planet with HST Time-Series Photometry [PDF]

Symposium - International Astronomical Union, 2004
We observed 4 planetary transits of HD 209458 with the STIS spectrograph on HST, and generated a photometric time series with extremely rapid cadence and high precision. We use these data to better constrain the orbital, stellar, and planetary parameters, and to search for circumplanetary rings and planetary satellites.
David Charbonneau, Timothy M. Brown, Ronald L. Gilliland, Robert W. Noyes, Adam Burrows   +4 more
openaire   +1 more source

On the nature of the progenitors of three type II-P supernovae: 2004et, 2006my and 2006ov

, 2010
The pre-explosion observations of the type II-P supernovae 2006my, 2006ov and 2004et, are re-analysed. In the cases of supernovae 2006my and 2006ov we argue that the published candidate progenitors are not coincident with their respective supernova sites
Crockett, R. M., Eldridge, J. J., Mattila, S., Maund, J. R., Pastorello, A., Smartt, S. J., Stephens, A. W.   +6 more
core   +1 more source

The UNCOVER Survey: A First-look HST + JWST Catalog of 60,000 Galaxies near A2744 and beyond

The Astrophysical Journal Supplement Series, 2023
In 2022 November, the James Webb Space Telescope (JWST) returned deep near-infrared images of A2744—a powerful lensing cluster capable of magnifying distant, incipient galaxies beyond it.
John R. Weaver, Sam E. Cutler, Richard Pan, Katherine E. Whitaker, Ivo Labbé, Sedona H. Price, Rachel Bezanson, Gabriel Brammer, Danilo Marchesini, Joel Leja, Bingjie Wang, Lukas J. Furtak, Adi Zitrin, Hakim Atek, Iryna Chemerynska, Dan Coe, Pratika Dayal, Pieter van Dokkum, Robert Feldmann, Natascha M. Förster Schreiber, Marijn Franx, Seiji Fujimoto, Yoshinobu Fudamoto, Karl Glazebrook, Anna de Graaff, Jenny E. Greene, Stéphanie Juneau, Susan Kassin, Mariska Kriek, Gourav Khullar, Michael V. Maseda, Lamiya A. Mowla, Adam Muzzin, Themiya Nanayakkara, Erica J. Nelson, Pascal A. Oesch, Camilla Pacifici, Casey Papovich, David J. Setton, Alice E. Shapley, Heath V. Shipley, Renske Smit, Mauro Stefanon, Edward N. Taylor, Andrea Weibel, Christina C. Williams   +45 more
doaj   +1 more source

Astrometry with Hubble Space Telescope: A Parallax of the Fundamental Distance Calibrator RR Lyrae [PDF]

, 2001
We present an absolute parallax and relative proper motion for the fundamental distance scale calibrator, RR Lyr. We obtain these with astrometric data from FGS 3, a white-light interferometer on HST. We find $\pi_{abs} = 3.82 \pm 0.2$ mas.
A. J. Bradley, A. L. Whipple, B. E. McArthur, Benedict G. F., Bergeat J., C. L. Slesnick, D. Story, E. Nelan, Feast M. W., Feast M. W., Fernley J., G. Fritz Benedict, Groenewegen M. A. T., Groenewegen M. A. T., Guinan E. F., Hanson R. B., J. Lee, J. Rhee, Kovacs G., L. H. Wasserman, L. W. Fredrick, Laney C. D., Luri X., Maloney F. P., Monet D. G., O. G. Franz, P. D. Hemenway, P. J. Shelus, Paczynski B., Paltoglou G., Perryman M. A. C., R. J. Patterson, R. L. Duncombe, Schmidt-Kaler Th., Standish E. M., Jr., Stanek K. Z., T. E. Harrison, Udalski A., Udalski A., Udalski A., Udalski A., van Leeuwen F., W. H. Jefferys, W. van Altena, Wood P. R.   +44 more
core   +3 more sources

All-sky Faint DA White Dwarf Spectrophotometric Standards for Astrophysical Observatories: The Complete Sample

The Astrophysical Journal, 2023
Hot DA white dwarfs (DAWDs) have fully radiative pure hydrogen atmospheres that are the least complicated to model. Pulsationally stable, they are fully characterized by their effective temperature T _eff and surface gravity $\mathrm{log}\,g$ , which can
Tim Axelrod, Abhijit Saha, Thomas Matheson, Edward W. Olszewski, Ralph C. Bohlin, Annalisa Calamida, Jenna Claver, Susana Deustua, Jay B. Holberg, Ivan Hubeny, John W. Mackenty, Konstantin Malanchev, Gautham Narayan, Sean Points, Armin Rest, Elena Sabbi, Christopher W. Stubbs   +16 more
doaj   +1 more source

A Long‐Term Study of Jupiter's Equatorial Winds at the Top of the Troposphere

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract Jupiter's equatorial atmosphere is covered by dense hazes that extend from the main cloud level to the lower stratosphere. These hazes are variable in optical depth and brightness, although the causes of these variations are unknown. James Webb Space Telescope (JWST) observations of the equatorial hazes in 2022 in near‐infrared wavelengths ...
M. Sánchez‐Arregui, A. Antuñano, R. Hueso, A. Sánchez‐Lavega   +3 more
wiley   +1 more source

SYMBIOTIC NOVA V1016 CYG AS INTERACTING BINARY

Odessa Astronomical Publications, 2017
Long-term UBV photoelectric and photographic photometry of the symbiotic nova V1016 Cyg is discussed. The pre-outburst brightening in 1949, main nova-like outburst in 1964 and two small brightenings in 1980 and 1994 suggest 15.1 ± 0.2 years period of ...
S. Parimucha, D. Chochol, T. Pribulla
doaj   +1 more source

CLASH: z ~ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7-4431 [PDF]

, 2013
We present a quintuply lensed z ~ 6 candidate discovered in the field of the galaxy cluster RXC J2248.7-4431 (z ~ 0.348) targeted within the Cluster Lensing and Supernova survey with Hubble (CLASH) and selected in the deep HST Frontier Fields survey ...
Balestra, I., Bartelmann, M., Benitez, N., Bouwens, R., Bradley, L., Broadhurst, T., Coe, D., Donahue, M., Drory, N., Eichner, T., Ford, H., Greisel, N., Grillo, C., Halkola, A., Host, O., Infante, L., Jimenez-Teja, Y., Jouvel, S., Kelson, D., Koekemoer, A., Kuchner, U., Lahav, O., Lemze, D., Medezinski, E., Melchior, P., Meneghetti, M., Merten, J., Molino, A., Monna, A., Moustakas, J., Moustakas, L., Nonino, M., Postman, M., Rosati, P., Seitz, S., Snigula, J., Suyu, S. H., Umetsu, K., Zheng, W., Zitrin, A.   +39 more
core   +2 more sources

JWST Imaging of the Closest Globular Clusters—VI. The Lowest‐Mass Objects in M 4 and the Galactic Bulge

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin, R. Gerasimov, A. Calamida, M. Libralato, M. Scalco, D. Nardiello, M. Griggio, D. Apai, J. Anderson, A. Bellini, A. Burgasser   +10 more
wiley   +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