Results 111 to 120 of about 53,340 (257)
Self-consistent Combined HST, K-band, and Spitzer Photometric Catalogs of the BUFFALO Survey Fields
The Astrophysical Journal Supplement SeriesThis article presents new astronomical source catalogs using data from the BUFFALO Survey. These catalogs contain detailed information for over 100,000 astronomical sources in the six BUFFALO clusters: A370, A2744, AS1063, MACS 0416, MACS 0717, and MACS ...
Amanda Pagul +16 more
doaj +1 more source
JWST-TST Proper Motions. I. High-precision NIRISS Calibration and Large Magellanic Cloud Kinematics
The Astrophysical Journal, 2023 We develop and disseminate effective point-spread functions and geometric-distortion solutions for high-precision astrometry and photometry with the JWST NIRISS instrument. We correct field dependencies and detector effects, and assess the
Mattia Libralato +29 more
doaj +1 more source
Synthetic photometry of globular clusters: Uncertainties on synthetic colors [PDF]
, 2018 Synthetic photometry is a great tool for studying globular clusters, especially for understanding the nature of their multiple populations. Our goal is to quantify the errors on synthetic photometry that are caused by uncertainties on stellar and observational/calibration parameters.
arxiv +1 more source
AGES OF M33 STAR CLUSTERS BASED ON THEHUBBLE SPACE TELESCOPE/WFPC2 PHOTOMETRY [PDF]
The Astrophysical Journal, 2009 We present a result of age estimation for star clusters in M33. We obtain color-magnitude diagrams (CMDs) of resolved stars in 242 star clusters from the HST/WFPC2 images. We estimate ages of 100 star clusters among these, by fitting the Padova theoretical isochrones to the observational CMDs. Age distribution of the star clusters shows a dominant peak
Won-Kee Park +2 more
openaire +3 more sources
The Astrophysical Journal LettersWe present high-definition observations with the James Webb Space Telescope (JWST) of >1000 Cepheids in a geometric anchor of the distance ladder, NGC 4258, and in five hosts of eight Type Ia supernovae, a far greater sample than previous studies with ...
Adam G. Riess +9 more
doaj +1 more source
Pulsar Astronomy: the HST Contribution [PDF]
arXiv, 2000 HST observations have contributed significantly to our knowledge on the behaviour of Isolated Neutron Stars (INSs) as optical emitters. First, HST has been instrumental both to discover new optical counterparts (PSR B1055-52, PSR B1929+10, PSR B0950+08) and to confirm proposed identifications (PSR B0656+14).
arxiv
HST Grism Observations of a Gravitationally Lensed Redshift 10 Galaxy [PDF]
, 2018 We present deep spectroscopic observations of a Lyman-break galaxy candidate (hereafter MACS1149-JD) at $z\sim9.5$ with the $\textit{Hubble}$ Space Telescope ($\textit{HST}$) WFC3/IR grisms. The grism observations were taken at 4 distinct position angles,
Bradač, Maruša +13 more
core +4 more sources
UV-optical Emission of AB Aur b Is Consistent with Scattered Stellar Light
The Astronomical Journal, 2023 The proposed protoplanet AB Aur b is a spatially concentrated emission source imaged in the millimeter-wavelength disk gap of the Herbig Ae/Be star AB Aur. Its near-infrared spectrum and absence of strong polarized light have been interpreted as evidence
Yifan Zhou +14 more
doaj +1 more source
The Importance of Nebular Continuum and Line Emission in Observations of Young Massive Star Clusters
, 2009 In this spectroscopic study of infant massive star clusters, we find that continuum emission from ionized gas rivals the stellar luminosity at optical wavelengths. In addition, we find that nebular line emission is significant in many commonly used broad-
Adelman-McCarthy +26 more
core +1 more source
HST/ACS PHOTOMETRY OF OLD STARS IN NGC 1569: THE STAR FORMATION HISTORY OF A NEARBY STARBURST [PDF]
The Astronomical Journal, 2012 50 pages, including 17 figures.
Francesca Annibali +7 more
openaire +4 more sources