Results 101 to 110 of about 53,340 (257)
, 2005 We have used the Advanced Camera for Surveys aboard the Hubble Space Telescope to obtain F435W, F555W and F814W single-epoch images of six fields in the spiral galaxy NGC 300.
Fabio Bresolin +7 more
core +1 more source
The Astronomical Journal, 2023 Wide-field and deep DECam multiband photometry, combined with HST data for the core of the Galactic globular cluster NGC 2808, allowed us to study the distribution of various stellar subpopulations and stars in different evolutionary phases out to the ...
Christian I. Johnson +9 more
doaj +1 more source
The Tolman Surface Brightness Test for the Reality of the Expansion. II. The Effect of the Point-Spread Function and Galaxy Ellipticity on the Derived Photometric Parameters [PDF]
, 2001 To complete the Tolman surface brightness test on the reality of the expansion of the Universe, we need to measure accurately the surface brightness profiles of the high-redshift galaxy sample.
Allan Sandage +3 more
core +2 more sources
A Snapshot Survey of Nearby Supernovae with the Hubble Space Telescope
The Astrophysical JournalOver recent decades, robotic (or highly automated) searches for supernovae (SNe) have discovered several thousand events, many of them in quite nearby galaxies (distances < 30 Mpc).
Raphael Baer-Way +14 more
doaj +1 more source
The extended structure of the dwarf irregular galaxy Sagittarius [PDF]
, 2014 We present a detailed study of the stellar and HI structure of the dwarf irregular galaxy Sagittarius. We use new deep and wide field photometry to trace the surface brightness profile of the galaxy out to ~5.0' (corresponding to ~1600 pc) and down to ...
Battaglia, G. +8 more
core +3 more sources
ИССЛЕДОВАНИЕ АКТИВНОСТИ ЯДРА СЕЙФЕРТОВСКОЙ ГАКТИКИ NGC 7469 ЗА ПЕРИОД НАБЛЮДЕНИЙ С1990-2008 ГГ.
Odessa Astronomical Publications, 2011 We combine many published photometrical observations of the Seyfert Galaxy (SG) NGC 7469 and also new results from Hubble Space Telescope which can be used for future research of some properties of the activity of the nuclear of the SG.
Л. С. Уголькова +1 more
doaj +1 more source
Hazy with a Chance of Star Spots: Constraining the Atmosphere of Young Planet K2-33b
The Astronomical Journal, 2022 Although all-sky surveys have led to the discovery of dozens of young planets, little is known about their atmospheres. Here, we present multiwavelength transit data for the super-Neptune sized exoplanet, K2-33b—the youngest (∼10 Myr) transiting ...
Pa Chia Thao +12 more
doaj +1 more source
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. +16 more
core +2 more sources
Dwarf irregular galaxy Leo A extends even farther, according to HST WFC3 photometry [PDF]
Astronomy & Astrophysics, 2018 Context. Leo A is an isolated gas-rich dwarf irregular galaxy of low stellar mass and metallicity residing at the outskirts of the Local Group. Ages of the stellar populations in Leo A range from ~10 Myr to ~10 Gyr. A large stellar halo (up to the deprojected distance of ~1.7 kpc) was discovered based on Subaru wide-field photometry of red giant branch
Alina Leščinskaitė +4 more
openaire +1 more source
A Near-infrared Survey of Candidate Haumea Family Members
The Astronomical JournalThe Haumea family is the only known dynamical family in the trans-Neptunian region. To date, 10 family members have been unambiguously identified using near-infrared (NIR) spectral or photometric data in combination with their strong dynamical proximity ...
Benjamin C. N. Proudfoot +7 more
doaj +1 more source