Results 1 to 10 of about 88,017 (272)

M Dwarfs from Hubble Space Telescope Star Counts. IV [PDF]

, 2001
We study a sample of about 1400 disk M dwarfs that are found in 148 fields observed with the Wide Field Camera 2 (WFC2) on the Hubble Space Telescope and 162 fields observed with pre-repair Planetary Camera 1 (PC1), of which 95 of the WFC2 fields are ...
Andrew Gould, Baraffe I., Burstein D., Chris Flynn, Hawkins M. R. S., John N. Bahcall, Samir Salim, Zheng Zheng   +7 more
core   +3 more sources

MEASURING THE HUBBLE CONSTANT WITH THE HUBBLE SPACE TELESCOPE [PDF]

Proceedings of the International Astronomical Union, 1995
AbstractTen years ago our team completed the Hubble Space Telescope Key Project on the extragalactic distance scale. Cepheids were detected in some 25 galaxies and used to calibrate four secondary distance indicators that reach out into the expansion field beyond the noise of galaxy peculiar velocities.
Freedman, W., Kennicutt, R., Mould, J.
openaire   +4 more sources

Maximum Entropy Estimates of Hubble Constant from Planck Measurements [PDF]

Entropy
A maximum entropy (ME) methodology was used to infer the Hubble constant from the temperature anisotropies in cosmic microwave background (CMB) measurements, as measured by the Planck satellite.
David P. Knobles, Mark F. Westling
doaj   +2 more sources

[ITAL]HUBBLE SPACE TELESCOPE[/ITAL][ITAL]Hubble Space Telescope[/ITAL] WFPC2 Imaging of Cassiopeia A [PDF]

The Astronomical Journal, 2001
The young SNR Cassiopeia A was imaged with WFPC-2 through four filters selected to capture the complete velocity range of the remnant's main shell in several important emission lines.
Robert A. Fesen, Jon A. Morse, Roger A. Chevalier, Kazimierz J. Borkowski, Christopher L. Gerardy, Stephen S. Lawrence, Sidney van den Bergh   +6 more
openaire   +5 more sources

Hubble Space Telescope observations of M31 associations [PDF]

Monthly Notices of the Royal Astronomical Society, 1997
Magnier, E.A., Hodge, P., Battinelli, P., Lewin, W.H.G., van Paradijs, J.A.   +4 more
openaire   +5 more sources

50 Years in Space Science

Perspectives of Earth and Space Scientists, 2022
These are my personal recollections of my 50‐year involvement in planning NASA space projects, including the Voyager Missions, The Hubble Space Telescope, the International Space Station, the Space Shuttle, the Falcon Space X launcher, and the James Webb
Charles F. Kennel
doaj   +1 more source

Constraint on the equation of state parameter (ω) in non-minimally coupled f(Q) gravity

Physics Letters B, 2021
We study observational constraints on the modified symmetric teleparallel gravity, the non-metricity f(Q) gravity, which reproduces background expansion of the universe.
Sanjay Mandal, P.K. Sahoo
doaj   +1 more source

COSMOS: Hubble Space Telescope Observations [PDF]

The Astrophysical Journal Supplement Series, 2007
21 pages, 6 figures -- to appear in COSMOS ApJ Suppl.
Scoville, N., Abraham, R. G., Aussel, H., Barnes, J. E., Benson, A., Blain, A. W., Calzetti, D., Comastri, A., Capak, P., Carilli, C., Carlstrom, J. E., Carollo, C. M., Colbert, J., Daddi, E., Ellis, R. S., Elvis, M., Ewald, S. P., Fall, M., Franceschini, A., Giavalisco, M., Green, W., Griffiths, R. E., Guzzo, L., Hasinger, G., Impey, C., Kneib, J. -P., Koda, J., Koekemoer, A., Lefevre, O., Lilly, S., Liu, C. T., Mccracken, H. J., Massey, R., Mellier, Y., Miyazaki, S., Mobasher, B., Mould, J., Norman, C., Refregier, A., Renzini, A., Rhodes, J., Rich, M., Sanders, D. B., Schiminovich, D., Schinnerer, E., Scodeggio, M., Sheth, K., Shopbell, P. L., Taniguchi, Y., Tyson, N. D., Urry, C. M., van Waerbeke, L., Vettolani, P., White, S. D. M., Yan, L.   +54 more
openaire   +9 more sources

HST Low-resolution Stellar Library

The Astrophysical Journal Supplement Series, 2023
In order to provide fundamental stellar spectra that extend into the UV, Hubble Space Telescope’s Space Telescope Imaging Spectrograph targeted 556 stars via proposals GO9088, GO9786, GO10222, and GO13776.
Tathagata Pal, Islam Khan, Guy Worthey, Michael D. Gregg, David R. Silva   +4 more
doaj   +1 more source

What the Upper Atmospheres of Giant Planets Reveal

Remote Sensing, 2022
The upper atmospheres of the Giant Planets, Jupiter, Saturn, Uranus and Neptune are transition regions between meteorological layers and outer space. As a result of their exceptionally rarefied nature, they are highly sensitive and therefore revealing ...
James O’Donoghue, Tom Stallard
doaj   +1 more source