Results 131 to 140 of about 53,340 (257)

On the Progenitor of the Type IIb Supernova 2016gkg [PDF]

, 2016
We present a detection in pre-explosion Hubble Space Telescope (HST) imaging of a point source consistent with being the progenitor star of the Type IIb supernova (SN IIb) 2016gkg. Post-explosion imaging from the Keck Adaptive Optics system was used to perform relative astrometry between the Keck and HST imaging.
arxiv   +1 more source

Stellar Metallicities and Gradients in the Isolated, Quenched Low-mass Galaxy Tucana

The Astrophysical Journal
We measure the metallicities of 374 red giant branch (RGB) stars in the isolated, quenched dwarf galaxy Tucana using Hubble Space Telescope narrowband (F395N) calcium H and K imaging.
Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Francisco J. Mercado, Alessandro Savino, Michael Boylan-Kolchin, Patrick Côté, Andrew E. Dolphin, Nicolas Longeard, Mario L. Mateo, Jenna Samuel, Nathan R. Sandford   +12 more
doaj   +1 more source

Supernova 1998bw - The final phases

, 2002
The probable association with GRB 980425 immediately put SN 1998bw at the forefront of supernova research. Here, we present revised late-time BVRI light curves of the supernova, based on template images taken at the VLT.
A. V. Filippenko, B. Leibundgut, Balberg, Bessell, C. Fransson, C. Kozma, Cappellaro, Clayton, Clocchiatti, F. Patat, Filippenko, Fitzpatrick, Fransson, Fruchter, Fynbo, Galama, Gardner, Höflich, Iwamoto, J. C. Wheeler, J. Sollerman, Kozma, Kulkarni, Lundqvist, Maeda, Mazzali, McKenzie, N. Panagia, Nakamura, P. Challis, P. Garnavich, P. Lundqvist, Patat, R. P. Kirshner, Rejkuba, S. T. Holland, Schechter, Schlegel, Schmidt, Schmidt, Sollerman, Sollerman, Stetson, Stetson, Tan, Weiler, Wilson, Woosley, Woosley   +48 more
core   +1 more source

Satellites of satellites: the power of combining HST photometry and Gaia

, 2019
In the prevailing Lambda Cold Dark Matter cosmology, galaxies grow continuously in mass through hierarchical assembly of smaller systems, and dark matter halos host substructures down to the resolution limit of the simulations. Hierarchical evolution should occur at all scales, implying that the satellites of the Milky Way should also have companions ...
openaire   +3 more sources

J-band Red Giant Branch Tip Magnitudes for the Distance Indicator [PDF]

arXiv, 2017
The tip of the red giant branch is one of the widely used distance measurement methods for the relatively nearby galaxies where the bright individual stars are resolved. Most of the earlier works have used the Photometry in the I-band such as HST ACS/WFC F814W or F850LP for the RGB tip method.
arxiv  

HST Observations of Globular Clusters in M31.I:Surface Photometry of 13 Objects

, 1993
We present the initial results of a study of globular clusters in M31, using the Faint Object Camera (FOC) on the Hubble Space Telescope (HST). The sample of objects consists of 13 clusters spanning a range of properties. Three inde- pendent image deconvolution techniques were used in order to compensate for the optical problems of the HST, leading to ...
Pecci, F. Fusi, Battistini, P., Bendinelli, O., Bònoli, F., Cacciari, C., Djorgovski, S., Federici, L., Ferraro, F. R., Parmeggiani, G., Weir, N., Zavatti, F.   +10 more
openaire   +2 more sources

Deep Hubble Space Telescope Photometry of Large Magellanic Cloud and Milky Way Ultrafaint Dwarfs: A Careful Look into the Magnitude–Size Relation

The Astrophysical Journal
We present deep Hubble Space Telescope photometry of 10 targets from Treasury Program GO-14734, including six confirmed ultrafaint dwarf (UFD) galaxies, three UFD candidates, and one likely globular cluster.
Hannah Richstein, Nitya Kallivayalil, Joshua D. Simon, Christopher T. Garling, Andrew Wetzel, Jack T. Warfield, Roeland P. van der Marel, Myoungwon Jeon, Jonah C. Rose, Paul Torrey, Anna Claire Engelhardt, Gurtina Besla, Yumi Choi, Marla Geha, Puragra Guhathakurta, Evan N. Kirby, Ekta Patel, Elena Sacchi, Sangmo Tony Sohn   +18 more
doaj   +1 more source

An HST survey of 33 T8 to Y1 brown dwarfs: NIR photometry and multiplicity of the coldest isolated objects [PDF]

, 2023
C. Fontanive, L. R. Bedin, Matthew De Furio, Beth Biller, Jay Anderson, M. Bonavita, Katelyn Allers, B. Pantoja   +7 more
openalex   +1 more source

PHAST. The Panchromatic Hubble Andromeda Southern Treasury. I. Ultraviolet and Optical Photometry of over 90 Million Stars in M31

The Astrophysical Journal
The Panchromatic Hubble Andromeda Southern Treasury (PHAST) is a large 195-orbit Hubble Space Telescope program imaging ∼0.45 deg ^2 of the southern half of M31's star-forming disk at optical and near-ultraviolet (NUV) wavelengths.
Zhuo Chen, Benjamin Williams, Dustin Lang, Andrew Dolphin, Meredith Durbin, Julianne J. Dalcanton, Adam Smercina, Léo Girardi, Claire E. Murray, Eric F. Bell, Martha L. Boyer, Richard D’Souza, Karoline Gilbert, Karl Gordon, Puragra Guhathakurta, Francois Hammer, L. Clifton Johnson, Tod R. Lauer, Margaret Lazzarini, Jeremiah W. Murphy, Ekta Patel, Amanda Quirk, Mariangelly Díaz Rodríguez, Julia Christine Roman-Duval, Robyn E. Sanderson, Anil Seth, Tobin M. Wainer, Daniel R. Weisz   +27 more
doaj   +1 more source

A Multiwavelength, Multiepoch Monitoring Campaign of Accretion Variability in T Tauri Stars from the ODYSSEUS Survey. III. Optical Spectra

The Astrophysical Journal
Classical T Tauri Stars (CTTSs) are highly variable stars that possess gas- and dust-rich disks from which planets form. Much of their variability is driven by mass accretion from the surrounding disk, a process that is still not entirely understood.
John Wendeborn, Catherine C. Espaillat, Thanawuth Thanathibodee, Connor E. Robinson, Caeley V. Pittman, Nuria Calvet, James Muzerolle, Fredrick M. Walter, Jochen Eislöffel, Eleonora Fiorellino, Carlo F. Manara, Ágnes Kóspál, Péter Ábrahám, Rik Claes, Elisabetta Rigliaco, Laura Venuti, Justyn Campbell-White, Pauline McGinnis, Manuele Gangi, Karina Mauco, Filipe Gameiro, Antonio Frasca, Zhen Guo   +22 more
doaj   +1 more source