Zobrazeno 1 - 10
of 228
pro vyhledávání: '"Sonnenfeld , Alessandro"'
Autor:
Sheu, William, Shajib, Anowar J., Treu, Tommaso, Sonnenfeld, Alessandro, Birrer, Simon, Cappellari, Michele, Oldham, Lindsay J., Tan, Chin Yi
We present a new measurement of the dark and luminous matter distribution of massive elliptical galaxies, and their evolution with redshift, by combining strong lensing and dynamical observables. Our sample of 58 lens galaxies covers a redshift range
Externí odkaz:
http://arxiv.org/abs/2408.10316
Autor:
Sonnenfeld, Alessandro
Publikováno v:
A&A 690, A325 (2024)
Strong gravitational lensing observations can provide extremely valuable information on the structure of galaxies, but their interpretation is made difficult by selection effects, which, if not accounted for, introduce a bias between the properties o
Externí odkaz:
http://arxiv.org/abs/2407.04771
Autor:
Sonnenfeld, Alessandro
Publikováno v:
A&A 688, A129 (2024)
Quadruply-imaged strongly lensed quasars (quads) are routinely used for measurements of the expansion rate of the Universe with time delays. It has recently been suggested that any quad lens is subject to a Malmquist-like bias that causes the inferre
Externí odkaz:
http://arxiv.org/abs/2406.17027
Publikováno v:
A&A 690, A390 (2024)
The statistics of Einstein radii for a sample of strong lenses can provide valuable constraints on the underlying mass distribution. The correct interpretation, however, relies critically on the modelling of the selection of the sample, which has pro
Externí odkaz:
http://arxiv.org/abs/2406.17019
Autor:
More, Anupreeta, Canameras, Raoul, Jaelani, Anton T., Shu, Yiping, Ishida, Yuichiro, Wong, Kenneth C., Inoue, Kaiki Taro, Schuldt, Stefan, Sonnenfeld, Alessandro
Efficient algorithms are being developed to search for strong gravitational lens systems owing to increasing large imaging surveys. Neural networks have been successfully used to discover galaxy-scale lens systems in imaging surveys such as the Kilo
Externí odkaz:
http://arxiv.org/abs/2405.12975
Autor:
Dogruel, M. Burak, Taylor, Edward, Cluver, Michelle, Colless, Matthew, de Graaff, Anna, Sonnenfeld, Alessandro, Lucey, John R., D'Eugenio, Francesco, Howlett, Cullan, Said, Khaled
Empirical correlations connecting starlight to galaxy dynamics (e.g., the fundamental plane (FP) of elliptical/quiescent galaxies and the Tully--Fisher relation of spiral/star-forming galaxies) provide cosmology-independent distance estimation and ar
Externí odkaz:
http://arxiv.org/abs/2405.10866
Autor:
Gawade, Priyanka, More, Anupreeta, More, Surhud, Kimura, Akisato, Sonnenfeld, Alessandro, Oguri, Masamune, Yoshida, Naoki
Strong lensing of background galaxies provides important information about the matter distribution around lens galaxies. Traditional modelling of such strong lenses is both time and resource intensive. Fast and automated analysis methods are the need
Externí odkaz:
http://arxiv.org/abs/2404.18897
Autor:
Tan, Chin Yi, Shajib, Anowar J., Birrer, Simon, Sonnenfeld, Alessandro, Treu, Tommaso, Wells, Patrick, Williams, Devon, Buckley-Geer, Elizabeth J., Drlica-Wagner, Alex, Frieman, Joshua
The mass distribution in massive elliptical galaxies encodes their evolutionary history, thus providing an avenue to constrain the baryonic astrophysics in their evolution. The power-law assumption for the radial mass profile in ellipticals has been
Externí odkaz:
http://arxiv.org/abs/2311.09307
A constant stellar mass-to-light ratio $M_\star/L$ has been widely-used in studies of galaxy dynamics and strong lensing, which aim at disentangling the mass distributions of dark matter and baryons. However, systematic biases arising from constant $
Externí odkaz:
http://arxiv.org/abs/2311.07442
Autor:
Dogruel, M. Burak, Taylor, Edward N., Cluver, Michelle, D'Eugenio, Francesco, de Graaff, Anna, Colless, Matthew, Sonnenfeld, Alessandro
In this empirical work, we aim to quantify the systematic uncertainties in stellar mass $(M_\star)$ estimates made from spectral energy distribution (SED) fitting through stellar population synthesis (SPS), for galaxies in the local Universe, by usin
Externí odkaz:
http://arxiv.org/abs/2306.10693