Results 31 to 40 of about 64,703 (265)

Photometric Redshifts with the LSST II: The Impact of Near-Infrared and Near-Ultraviolet Photometry

, 2020
Accurate photometric redshift (photo-$z$) estimates are essential to the cosmological science goals of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST).
Connolly, Andrew J., Côté, Patrick, Daniel, Scott F., Fabbro, Sébastien, Graham, Melissa L., Ivezić, Željko, Jones, R. Lynne, Jurić, Mario, Kalmbach, J. Bryce, Morrison, Christopher B., Schmidt, Samuel J., Wang, Winnie, Yoachim, Peter   +12 more
core   +1 more source

Stochastic 2-D Galaxy disk Evolution Models. Resolved Stellar Populations in the Galaxy M33

Open Astronomy, 2015
We improved the stochastic 2-D galaxy disk models (Mineikis & Vansevičius 2014a) by introducing enriched gas outflows from galaxies and synthetic color-magnitude diagrams of stellar populations.
Mineikis T., Vansevičius V.
doaj   +1 more source

Merging galaxies in isolated environments I. Multiband photometry, classification, stellar masses, and star formation rates

, 2019
Extragalactic surveys provide significant statistical data for the study of crucial galaxy parameters used to constrain galaxy evolution, e.g. stellar mass (M$_*$) and star formation rate (SFR), under different environmental conditions.
Calderón-Castillo, Paula, Chang, Yu-Yen, Hughes, Thomas M., Leiton, Roger, Nagar, Neil M., Orellana, Gustavo, Yi, Sukyoung   +6 more
core   +1 more source

SGAS 143845.1+145407: A Big, Cool Starburst at Redshift 0.816 [PDF]

, 2012
We present the discovery and a detailed multi-wavelength study of a strongly-lensed luminous infrared galaxy at z=0.816. Unlike most known lensed galaxies discovered at optical or near-infrared wavelengths this lensed source is red, r-Ks = 3.9 [AB ...
Abramson, Louis E., Bans, Alissa, Baxter, Eric J., Bayliss, Matthew B., Benford, Dominic J., Dahle, Hakon, Finkelstein, Keely D., Gladders, Michael D., Helsby, Jennifer E., Kelson, Daniel D., Koester, Benjamin P., Monson, Andrew J., Murphy, David, Persson, S. E., Rigby, Jane R., Sharon, Keren, Wuyts, Eva   +16 more
core   +3 more sources

Probing Cosmic Dawn: Modelling the Assembly History, SEDs, and Dust Content of Selected $z\sim9$ Galaxies [PDF]

, 2019
The presence of spectroscopically confirmed Balmer breaks in galaxy spectral energy distributions (SEDs) at $z>9$ provides one of the best probes of the assembly history of the first generations of stars in our Universe.
Devriendt, Julien, Ellis, Richard S., Katz, Harley, Laporte, Nicolas, Slyz, Adrianne   +4 more
core   +2 more sources

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, EarlyView.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

A photometric and spectroscopic study of the new dwarf spheroidal galaxy in Hercules

, 2009
Our aim is to provide as clean and as complete a sample as possible of red giant branch stars that are members of the Hercules dSph galaxy. With this sample we explore the velocity dispersion and the metallicity of the system.
A. Koch, Anthony-Twarog, Battaglia, Belokurov, Belokurov, Belokurov, Belokurov, Bertin, Bonanos, Bond, Calamida, Carretta, Carretta, Clem, Cole, Coleman, D. Adén, D. B. Zucker, D. Faria, E. K. Grebel, Faria, G. F. Gilmore, Gallagher, Gilbert, Gilmore, Grebel, Helmi, Hilker, Howell, I. Lundström, Irwin, Jordi, Keller, Kirby, Kirby, Kleyna, Kniazev, Koch, Koch, Koch, Koch, Koch, Koch, Lanfranchi, Lind, M. I. Wilkinson, Marigo, Martin, N. W. Evans, Olsen, Olsen, Olsen, Olsen, Olsen, Olsen, Olszewski, Pasquini, Richtler, Robin, Rutledge, Rutledge, S. Feltzing, Schiavon, Schlegel, Schuster, Schuster, Shetrone, Siegel, Simon, Strigari, Tonry, Ural, V. Belokurov, VandenBerg, Walker, Walker, Walsh, Walsh, Zinn, Zucker, Zucker   +80 more
core   +1 more source

The Resolved Outer Population of NGC6822 with WFPC2 [PDF]

, 1999
We present F336W (U), F439W (B), F555W (V), and F675W (R) Wide Field Planetary Camera 2 (WFPC2) photometry of two outer regions of the Local Group dwarf irregular galaxy NGC6822. The NE region is ~13 arcmin from the galaxy centre, while the W region lies
B. Cavanagh, Bertelli G., J. B. Hutchings, L. Bianchi, McAlary C. W.   +4 more
core   +3 more sources

Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei

Astronomische Nachrichten, EarlyView.
ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley   +1 more source

The Bochum Survey of the Southern Galactic Disk: III. Complete Data Release

Astronomische Nachrichten, Volume 347, Issue 3, March 2026.
ABSTRACT The Southern Galactic Disk Survey (GDS) monitored a mosaic of 268 fields along a 6°$$ {6}^{{}^{\circ}} $$‐wide stripe in the southern Galactic disk with simultaneous observations in r′$$ {r}^{\prime } $$ and i′$$ {i}^{\prime } $$ (7m≲r′,i′≲18m$$ {7}^{\mathrm{m}}\lesssim {r}^{\prime },{i}^{\prime}\lesssim {18}^{\mathrm{m}} $$) from September ...
Julia Blex, Moritz Hackstein, Christian Westhues, Michael Ramolla, Markus Demleitner, Dominik J. Bomans, Kerstin Weis, Christofer Fein, Rolf Chini   +8 more
wiley   +1 more source