Results 81 to 90 of about 62,204 (222)

Optimising Spectroscopic and Photometric Galaxy Surveys: Efficient Target Selection and Survey Strategy [PDF]

, 2013
The next generation of spectroscopic surveys will have a wealth of photometric data available for use in target selection. Selecting the best targets is likely to be one of the most important hurdles in making these spectroscopic campaigns as successful ...
Abdalla, F. B., Annis, J., Frieman, J. A., Jouvel, S., Kirk, D., Kron, R., Lahav, O., Lin, H.   +7 more
core   +1 more source

Preimpact Detection of Chelyabinsk‐Type Objects in the Thermal Infrared: Possibilities and Limitations

Advances in Astronomy, Volume 2025, Issue 1, 2025.
The Chelyabinsk meteor entered Earth’s atmosphere on 15 February 2013, producing a shock wave that injured about 1500 people and damaged thousands of buildings. Despite its relatively large size (∼20 m), the progenitor asteroid approached Earth undetected. Its apparent radiant was too close to the Sun for standard ground‐based near‐Earth asteroid (NEA)
Thomas Müller, Luca Conversi, Javier Licandro, Marco Delbo, Alan Fitzsimmons, Karri Muinonen, Marcel Popescu, Paolo Tanga, Richard Moissl, Michael Kueppers   +9 more
wiley   +1 more source

High-z Stellar Masses Can Be Recovered Robustly with JWST Photometry

The Astrophysical Journal Letters
Robust inference of galaxy stellar masses from photometry is crucial for constraints on galaxy assembly across cosmic time. Here, we test a commonly used spectral energy distribution (SED) fitting code using simulated galaxies from the S phinx ^20 ...
R. K. Cochrane, H. Katz, R. Begley, C. C. Hayward, P. N. Best   +4 more
doaj   +1 more source

The incidence of the host galaxy in microvariability observations of quasars [PDF]

, 2000
The incidence of a host galaxy in aperture photometry of active galactic nuclei is studied by means of actual and simulated CCD observations. Our goal is to evaluate the importance of spurious variations, introduced by seeing fluctuations during the ...
Cellone, Sergio Aldo, Combi, Jorge Ariel, Romero, Gustavo Esteban   +2 more
core   +2 more sources

Spectroscopic Confirmation of an Ultra-Massive Galaxy in a Protocluster at $z \sim 4.9$

The Open Journal of Astrophysics
We present spectroscopic confirmation of an ultra-massive galaxy (UMG) with $\log(M_\star/M_\odot) = 10.98 \pm 0.07$ at $z_\mathrm{spec} = 4.8947$ in the Extended Groth Strip (EGS), based on deep observations of Ly$\alpha$ emission with Keck/DEIMOS.
Stephanie M. Urbano Stawinski, M. C. Cooper, Ben Forrest, Adam Muzzin, Danilo Marchesini, Gillian Wilson, Percy Gomez, Ian McConachie, Z. Cemile Marsan, Marianna Annuziatella, Wenjun Chang   +10 more
doaj   +1 more source

J-PAS: A neural network approach to single stellar population characterisation

Astronomy & Astrophysics
J-PAS (Javalambre Physics of the Accelerating Universe Astrophysical Survey) will present a groundbreaking photometric survey covering 8500 deg2 of the visible sky from Javalambre, capturing data in 56 narrow-band filters.
Domínguez Sánchez H., Coelho P., Bruzual G., Hernán-Caballero A., López Sanjuan C., Fernandez-Ontiveros J. A., Díaz-García L. A., Suelves L., Álvarez-Candal A., Breda I., Gurung-López S., Placco V., Vega-Ferrero J., Vílchez J. M., Abramo R., Alcaniz J., Benitez N., Bonoli S., Carneiro S., Cenarro J., Cristóbal-Hornillos D., Dupke R., Ederoclite A., Hernández–Monteagudo C., Marín-Franch A., Mendes de Oliveira C., Moles M., Sodré L., Taylor K., Varela J., Vázquez Ramió H.   +30 more
doaj   +1 more source

The S4G-WISE View of Global Star Formation in the Nearby Universe

The Astrophysical Journal
In this work, we present source-tailored Wide-field Infrared Survey Explorer (WISE) mid-infrared photometry (at 3.4, 4.6, 12, and 23 μ m) of 2812 galaxies in the extended Spitzer Survey of Stellar Structure in Galaxies sample, and characterize the mid ...
M. E. Cluver, T. H. Jarrett, D. A. Dale, J.-D. T. Smith, M. J. I. Brown, W. van Kempen, E. Lengerer, R. Incoll, C. Davey, R. Holloway, J. Cameron, K. Sheth   +11 more
doaj   +1 more source

Direct Measurements of the Stellar Continua and Balmer/4000 Angstrom Breaks of Red z>2 Galaxies: Redshifts and Improved Constraints on Stellar Populations

, 2006
We use near-infrared (NIR) spectroscopy obtained with GNIRS on Gemini, NIRSPEC on KECK, and ISAAC on the VLT to study the rest-frame optical continua of three `Distant Red Galaxies' (having Js - Ks > 2.3) at z>2.
Danilo Marchesini, Eric Gawiser, Garth D. Illingworth, Gregory Rudnick, Hans‐Walter Rix, Ivo Labbe, Madau P., Marijn Franx, Mariska Kriek, Natascha M. Forster Schreiber, Paul van der Werf, Pieter G. van Dokkum, Ryan Quadri, Stijn Wuyts, Sune Toft   +14 more
core   +1 more source

Optical Identification of Cepheids in 19 Host Galaxies of Type Ia Supernovae and NGC 4258 with the Hubble Space Telescope [PDF]

, 2016
We present results of an optical search for Cepheid variable stars using the Hubble Space Telescope (HST) in 19 hosts of Type Ia supernovae (SNe Ia) and the maser-host galaxy NGC 4258, conducted as part of the SH0ES project (Supernovae and H0 for the ...
Amanullah, Rahman, Casertano, Stefano, Chornock, Ryan, Filippenko, Alexei V., Foley, Ryan J., Goobar, Ariel, Hoffmann, Samantha L., Macri, Lucas M., Riess, Adam G., Silverman, Jeffrey M., Tucker, Brad E., Welch, Douglas L., Yuan, Wenlong   +12 more
core   +3 more sources

Surface photometry of southern elliptical galaxies

The Astrophysical Journal Supplement Series, 1988
The results of a surface photometry survey for 131 elliptical galaxies in the southern hemisphere are presented. In this paper isophotal maps and major-axis profiles are shown, deriving for each galaxy in the sample structural parameters using the de Vaucouleurs law as useful parametric descriptor of the light distribution of elliptical galaxies.
R. R. de Carvalho, L. N. da Costa
openaire   +1 more source