Results 121 to 130 of about 30,917 (231)

Distances of the bulge globular clusters Terzan 5, Liller 1, UKS 1, and Terzan 4 based on HST NICMOS photometry [PDF]

, 2007
S. Ortolani, B. Barbuy, E. Bica, M. Zoccali, A. Renzini   +4 more
openalex   +1 more source

HST/ACS Wide-Field Photometry of the Sombrero Galaxy Globular Cluster System

, 2006
18 pages, including 23 figures and 4 tables. Accepted for publication in AJ.
Spitler, L. R., Larsen, S. S., Strader, J., Brodie, J. P., Forbes, D. A., Beasley, M. A.   +5 more
openaire   +2 more sources

An Unexplained Origin for the Unusual Globular Cluster System in the Ultradiffuse Galaxy FCC 224

The Astrophysical Journal
We study the quiescent ultradiffuse galaxy FCC 224 in the Fornax cluster using Hubble Space Telescope (HST) imaging, motivated by peculiar properties of its globular cluster (GC) system revealed in shallower imaging.
Yimeng Tang, Aaron J. Romanowsky, Jonah S. Gannon, Steven R. Janssens, Jean P. Brodie, Kevin A. Bundy, Maria Luisa Buzzo, Enrique A. Cabrera, Shany Danieli, Anna Ferré-Mateu, Duncan A. Forbes, Pieter G. van Dokkum   +11 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

Hubble Space Telescope study of resolved red giant stars in the outer halos of nearby dwarf starburst galaxies

, 2011
[abridged] Aims. We observed the outer parts of NGC 1569 and NGC 4449, two of the closest and strongest dwarf starburst galaxies in the local universe, to characterize their stellar density and populations, and obtain new insights into the structure ...
A. Aloisi, A. J. Grocholski, A. Ryś, Aloisi, Alonso-García, Angeretti, Annibali, Barker, Bekki, Bellazzini, Boyer, Burstein, Cioni, Cole, Cooper, Dolphin, F. Annibali, Gelatt, Girardi, Grebel, Greggio, Grocholski, Holtzman, Hunter, Hunter, Jurić, Kobulnicky, Marigo, McQuinn, Noël, R. P. van der Marel, Robin, Schade, Schlegel, Sirianni, Stetson, Stinson, Thuan, Tikhonov, Tikhonov, Tolstoy, Tosi, Tosi, Vansevičius, Willett, Zolotov   +45 more
core   +1 more source

HSTPhotometry of Dwarf Elliptical Galaxies in Coma, and an Explanation for the Alleged Structural Dichotomy between Dwarf and Bright Elliptical Galaxies [PDF]

, 2003
Alister W. Graham, Rafael Guzmn
openalex   +1 more source

The Centers of Early-Type Galaxies with HST. V. New WFPC2 Photometry

, 2004
76 pages, 40 figures, submitted to the Astronomical Journal. The complete postscript version of the paper is available at http://www.noao.edu/noao/staff/lauer/nuker.html (the Nuker Team page)
Lauer, Tod, Faber, S.M., Gebhardt, Karl, Richstone, Douglas D.O., Tremaine, Scott, Ajhar, Edward A, Aller, Monique, Bender, Ralf, Dressler, Alan, Filippenko, Alexei A.V., Green, Richard, Grillmair, Carl J, Ho, Luis L.C., Kormendy, John, Magorrian, John, Pinkney, Jason, Siopis, Christos   +16 more
openaire   +2 more sources

A Low Metallicity Massive Contact Binary Star System Candidate in WLM Identified by Hubble and James Webb Space Telescope Imaging

The Astrophysical Journal
We present archival Hubble Space Telescope (HST) and JWST ultraviolet through near-infrared time series photometric observations of a massive minimal-contact binary candidate in the metal-poor galaxy Wolf–Lundmark–Melotte ( Z  = 0.14 Z _⊙ ).
Maude Gull, Daniel R. Weisz, Kareem El-Badry, Jan Henneco, Alessandro Savino, Meredith Durbin, Yumi Choi, Roger E. Cohen, Andrew A. Cole, Matteo Correnti, Julianne J. Dalcanton, Karoline M. Gilbert, Steven R. Goldman, Puragra Guhathakurta, Kristen B. W. McQuinn, Max J. B. Newman, Evan D. Skillman, Benjamin F. Williams   +17 more
doaj   +1 more source

A cross-calibration between Tycho-2 photometry and HST spectrophotometry

, 2005
11 pages, 4 figures, to appear in Publications of the Astronomical Society of the Pacific (June 2005 issue)
openaire   +2 more sources

The Type II SN 2025pht in NGC 1637: A Red Supergiant with Carbon-rich Circumstellar Dust as the First JWST Detection of a Supernova Progenitor Star

The Astrophysical Journal Letters
We present follow-up imaging and spectroscopy and pre-explosion imaging of SN 2025pht located in NGC 1637 at 12 Mpc. Our spectroscopy shows that SN 2025pht is a Type II supernova (SN) with broad lines of hydrogen and with minimal line-of-sight extinction
Charles D. Kilpatrick, Aswin Suresh, Kyle W. Davis, Maria R. Drout, Ryan J. Foley, Alexander Gagliano, Wynn V. Jacobson-Galán, Ravjit Kaur, Kirsty Taggart, Jason Vazquez   +9 more
doaj   +1 more source