Results 41 to 50 of about 62,204 (222)

Classifying Astronomical Transients Using Only Host Galaxy Photometry

The Astrophysical Journal, 2023
The Legacy Survey of Space and Time (LSST) at the Vera C. Rubin Observatory will discover tens of thousands of extragalactic transients each night. The high volume of alerts demands immediate classification of transient types in order to prioritize ...
Marina Kisley, Yu-Jing Qin, Ann Zabludoff, Kobus Barnard, Chia-Lin Ko   +4 more
doaj   +1 more source

The void galaxy survey: photometry, structure and identity of void galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
We analyze photometry from deep B-band images of 59 void galaxies in the Void Galaxy Survey (VGS), together with their near-infrared 3.6$ $m and 4.5$ $m Spitzer photometry. The VGS galaxies constitute a sample of void galaxies that were selected by a geometric-topological procedure from the SDSS DR7 data release, and which populate the deep interior ...
B. Beygu, R. F. Peletier, J. M. van der Hulst, T. H Jarrett, K. Kreckel, R. van de Weygaert, J. H. van Gorkom, M. A. Aragon-Calvo   +7 more
openaire   +4 more sources

The central region of the Fornax cluster -- I. A catalog and photometric properties of galaxies in selected CCD fields [PDF]

, 1998
We present a photometric catalog (based on V and I photometry) of galaxies in the central regions of the Fornax galaxy cluster. Our 11 CCD fields cover 0.17 degrees in total.
Hilker, M., Infante, L., Kissler-Patig, M., Quintana, H., Richtler, T.   +4 more
core   +3 more sources

PERICLES: A Set of Empirical Rotational Isochrones Modeled on Cool Dwarfs in Open Clusters and Wide Binaries

Astronomische Nachrichten, Volume 347, Issue 1, January 2026.
ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley   +1 more source

Bayesian Posteriors with Stellar Population Synthesis on GPUs

The Open Journal of Astrophysics
Models of Stellar Population Synthesis (SPS) provide a predictive framework for the spectral energy distribution (SED) of a galaxy. SPS predictions can be computationally intensive, creating a bottleneck for attempts to infer the physical properties of ...
Georgios Zacharegkas, Andrew Hearin, Andrew Benson   +2 more
doaj   +1 more source

Climate Emergency and Different Ways to Fail? The Fermi Paradox, the Simulation Hypothesis, Agency and Hope

Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.
ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley   +1 more source

One Galaxy Sample to Rule Them All: Halo Occupation Distribution Modeling of DES Year 3 Source Galaxies

The Astrophysical Journal
For the joint analysis of second-order weak-lensing and galaxy clustering statistics, so-called 3 × 2 analyses, the selection and characterization of optimal galaxy samples is a major area of research.
Andrés N. Salcedo, Tim Eifler, Peter Behroozi   +2 more
doaj   +1 more source

Accuracy of photometric redshifts for future weak lensing surveys from space

, 2012
Photometric redshifts are a key tool to extract as much information as possible from planned cosmic shear experiments. In this work we aim to test the performances that can be achieved with observations in the near-infrared from space and in the optical ...
Abdalla, Abdalla, Beckwith, Benitez, Bertin, Bolzonella, Bordoloi, Capak, Coe, Collister, Dahlen, Els, Erben, F. Bellagamba, Feldmann, Hildebrandt, Kaiser, Kitching, Kuijken, L. Moscardini, M. Bolzonella, M. Meneghetti, Magnier, Mei, Melchior, Menanteau, Meneghetti, Meneghetti, Rafelski, Rowan-Robinson, Schock, Tokovinin, Umetsu, Way   +33 more
core   +1 more source

Herschel Far-Infrared and Sub-millimeter Photometry for the KINGFISH Sample of Nearby Galaxies [PDF]

, 2011
New far-infrared and sub-millimeter photometry from the Herschel Space Observatory is presented for 61 nearby galaxies from the Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel (KINGFISH) sample.
A. D. Bolatto, A. E. Miller, A. F. Crocker, A. K. Leroy, Aguirre, B. A. Groves, B. D. Johnson, B. R. Brandl, B. T. Draine, Benford, Bolatto, C. D. Wilson, C. W. Engelbracht, C.-N. Hao, D. A. Dale, D. Calzetti, Dale, Dale, Dale, Dale, Draine, Draine, E. J. Montiel, E. J. Murphy, E. Schinnerer, Engelbracht, F. S. Tabatabaei, F. Walter, Finkbeiner, G. Aniano, G. Helou, H. Roussel, H.-W. Rix, J. Koda, J. L. Hinz, J.-D. T. Smith, K. D. Gordon, K. M. Sandstrom, K. V. Croxall, Kennicutt, Kovács, L. Armus, L. K. Hunt, Li, M. G. Wolfire, M. Galametz, M. Sauvage, Moustakas, N. Rahman, O. Krause, Ott, P. Beirão, P. N. Appleton, Pascale, Pilyugin, R. A. Skibba, R. C. Kennicutt, Roussel, S. E. Meidt, S. Zibetti, Schlegel, Skibba, Smith, Walter, Walter, Weingartner, Y. Li   +66 more
core   +4 more sources

JWST Imaging of the Closest Globular Clusters—VI. The Lowest‐Mass Objects in M 4 and the Galactic Bulge

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin, R. Gerasimov, A. Calamida, M. Libralato, M. Scalco, D. Nardiello, M. Griggio, D. Apai, J. Anderson, A. Bellini, A. Burgasser   +10 more
wiley   +1 more source