Results 81 to 90 of about 53,340 (257)

Pulsating stars and the distance scale

EPJ Web of Conferences, 2017
I present an overview of the latest results from the SH0ES project, which obtained homogeneous Hubble Space Telescope (HST) photometry in the optical and near-infrared for ∼ 3500 and ∼ 2300 Cepheids, respectively, across 19 supernova hosts and 4 ...
Macri Lucas
doaj   +1 more source

A High-Resolution Hubble Space Telescope Study of Apparent Lyman Continuum Leakers at $z\sim3$ [PDF]

, 2015
We present $U_{336}V_{606}J_{125}H_{160}$ follow-up $HST$ observations of 16 $z\sim3$ candidate LyC emitters in the HS1549+1919 field. With these data, we obtain high spatial-resolution photometric redshifts of all sub-arcsecond components of the LyC ...
Mostardi, Robin E., Reddy, Naveen A., Shapley, Alice E., Siana, Brian, Steidel, Charles C., Trainor, Ryan F.   +5 more
core   +2 more sources

JWST imaging of the closest globular clusters—I. Possible infrared excess among white dwarfs in NGC 6397

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We present James Webb Space Telescope observations of the globular cluster NGC 6397 and use them to extend to infrared wavelengths the characterization of the cluster's entire white dwarf (WD) cooling sequence (CS). The data allows us to probe fundamental astrophysical WD properties and to search for evidence in their colors for (or against ...
L. R. Bedin, D. Nardiello, M. Salaris, M. Libralato, P. Bergeron, A. J. Burgasser, D. Apai, M. Griggio, M. Scalco, J. Anderson, R. Gerasimov, A. Bellini   +11 more
wiley   +1 more source

The Sloan Lens ACS Survey. IX. Colors, Lensing and Stellar Masses of Early-type Galaxies

, 2009
We present the current photometric dataset for the Sloan Lens ACS (SLACS) Survey, including HST photometry from ACS, WFPC2, and NICMOS. These data have enabled the confirmation of an additional 15 grade `A' (certain) lens systems, bringing the number of ...
A. S. Bolton, Auger, Bell, Bernardi, Bolton, Bolton, Bolton, Bundy, Conroy, Gavazzi, Gavazzi, Graves, K. Bundy, Koopmans, Koopmans, Kormann, L. A. Moustakas, L. V. E. Koopmans, M. W. Auger, Markwardt, P. J. Marshall, Peng, R. Gavazzi, Rozo, Rusin, Rusin, Skilling, Stoughton, T. Treu, Thomas, Treu, Treu, Treu   +32 more
core   +3 more sources

Cloud Atlas: High-Contrast Time-Resolved Observations of Planetary-Mass Companions [PDF]

, 2019
Directly-imaged planetary-mass companions offer unique opportunities in atmospheric studies of exoplanets. They share characteristics of both brown dwarfs and transiting exoplanets, therefore, are critical for connecting atmospheric characterizations for
Apai, Dániel, Bedin, Luigi R., Burgasser, Adam J., Cowan, Nicolas B., karalidi, Theodora, Lew, Ben W. P., Lowrance, Patrick J., Manjavacas, Elena, Marley, Mark S., Metchev, Stanimir, Miels-Páez, Paulo A., Radigan, Jacqueline, Schneider, Glenn, Zhou, Yifan   +13 more
core   +4 more sources

Cloud Atlas: High-precision HST/WFC3/IR Time-resolved Observations of Directly Imaged Exoplanet HD 106906b [PDF]

, 2020
HD 106906b is an ~11M_(Jup), ~15 Myr old directly imaged exoplanet orbiting at an extremely large distance from its host star. The wide separation (7 11) between HD 106906b and its host star greatly reduces the difficulty in direct-imaging observations,
Apai, Dániel, Bedin, Luigi R., Burgasser, Adam J., Cowan, Nicolas B., Karalidi, Theodora, Lew, Ben W. P., Lowrance, Patrick J., Manjavacas, Elena, Metchev, Stanimir, Miles-Páez, Paulo A., Radigan, Jacqueline, Schneider, Glenn, Zhou, Yifan   +12 more
core   +3 more sources

Gaia23ckh: Symbiotic outburst of the assumed Mira variable V390 Sco

Astronomische Nachrichten, Volume 345, Issue 5, June 2024.
Abstract The poorly studied variable star V390 Sco, previously classified as a Mira pulsator, was detected in a brightening event by the ESA Gaia satellite in September 2023. This work presents an analysis of available archival multifrequency photometric data of this target, along with our spectroscopic observations. Our findings lead to the conclusion
Jaroslav Merc, Peter Velez, Stéphane Charbonnel, Olivier Garde, Pascal Le Dû, Lionel Mulato, Thomas Petit, Jan Skowron   +7 more
wiley   +1 more source

Properties of the Photometric Components of Lenticular Galaxies

Advances in Astronomy, Volume 2012, Issue 1, 2012., 2012
After almost one century since their definition, the origin of lenticular galaxies is still a matter of debate. Several formation processes have been proposed in order to explain the wide variety of their observational properties. These properties could indicate that the class of lenticulars is a family formed by galaxies with different formations and ...
J. Alfonso L. Aguerri, Elias Brinks
wiley   +1 more source

Probing the Hill Sphere of (486958) 2014 MU$_{69}$: HST FGS Observations During the July 17, 2017 Stellar Occultation [PDF]

, 2018
We observed the July 17, 2017 stellar occultation of HD 168233 by the Kuiper Belt Object (486958) 2014 MU$_{69}$, the close flyby target of the extended New Horizons mission. Rather than capture a solid body occultation by the KBO itself, our program aimed to constrain the opacity of rings, moons, or other debris in the nearby environment.
arxiv   +1 more source

Exomoon Phase Curves: Toroidal Exosphere Simulations of Exo‐Ios Orbiting 8 Exoplanets in Alkali Spectroscopy

Journal of Geophysical Research: Planets, Volume 129, Issue 3, March 2024.
Abstract Toroidal atmospheres and exospheres characterized at exoplanets may be fueled by volcanically active exomoons, often referred to as exo‐Ios. We study the neutral outgassing and volatile evolution of a close‐orbiting, evaporating satellite at eight candidate exoplanet‐exomoon systems WASP‐49,‐96,‐69,‐17 b, XO‐2N b, HAT‐P‐1 b, HD‐189733 b, and ...
M. Meyer zu Westram, A. V. Oza, A. Galli
wiley   +1 more source