Zobrazeno 1 - 10
of 114
pro vyhledávání: '"JANSSENS, A. R."'
Autor:
Janssens, Steven R., Forbes, Duncan A., Romanowsky, Aaron J., Gannon, Jonah, Pfeffer, Joel, Couch, Warrick J., Brodie, Jean P., Harris, William E., Durrell, Patrick R., Bekki, Kenji
We present Hubble Space Telescope ACS/WFC and WFC3/UVIS imaging for a sample of 50 low surface brightness (LSB) galaxies in the $\sim$10$^{15}$ M$_{\odot}$ Perseus cluster, which were originally identified in ground-based imaging. We measure the stru
Externí odkaz:
http://arxiv.org/abs/2409.07518
Publikováno v:
Research Notes of the American Astronomical Society, 8, 202 (2024)
Two low surface brightness (LSB) dwarf galaxies were identified recently as having little or no dark matter (DM), provoking widespread interest in their formation histories. These galaxies also host populous systems of star clusters that are on avera
Externí odkaz:
http://arxiv.org/abs/2408.12663
Autor:
Shen, Zili, Bowman, William P., van Dokkum, Pieter, Abraham, Roberto G., Pasha, Imad, Keim, Michael A., Liu, Qing, Lokhorst, Deborah M., Janssens, Steven R., Chen, Seery
The Dragonfly Telephoto Array employs a unique design to detect very large and diffuse galaxies, which might be missed with conventional telescopes. The Dragonfly Ultrawide Survey (DFUWS) is a new wide-field survey which will cover 10,000 deg$^2$ of
Externí odkaz:
http://arxiv.org/abs/2407.05200
Autor:
Pfeffer, Joel, Janssens, Steven R., Buzzo, Maria Luisa, Gannon, Jonah S., Bastian, Nate, Bekki, Kenji, Brodie, Jean P., Couch, Warrick J., Crain, Robert A., Forbes, Duncan A., Kruijssen, J. M. Diederik, Romanowsky, Aaron J.
Observational surveys have found that the dynamical masses of ultra-diffuse galaxies (UDGs) correlate with the richness of their globular cluster (GC) system. This could be explained if GC-rich galaxies formed in more massive dark matter haloes. We u
Externí odkaz:
http://arxiv.org/abs/2403.14873
Autor:
Buzzo, Maria Luisa, Forbes, Duncan A., Jarrett, Thomas H., Marleau, Francine R., Duc, Pierre-Alain, Brodie, Jean P., Romanowsky, Aaron J., Gannon, Jonah S., Janssens, Steven R., Pfeffer, Joel, Ferré-Mateu, Anna, Haacke, Lydia, Couch, Warrick J., Lim, Sungsoon, Sánchez-Janssen, Rubén
We use spectral energy distribution (SED) fitting to place constraints on the stellar populations of 59 ultra-diffuse galaxies (UDGs) in the low-to-moderate density fields of the MATLAS survey. We use the routine PROSPECTOR, coupled with archival dat
Externí odkaz:
http://arxiv.org/abs/2402.12033
Autor:
Liu, Qing, Abraham, Roberto G., Martin, Peter G., Bowman, William P., van Dokkum, Pieter, Janssens, Steven R., Chen, Seery, Keim, Michael A., Lokhorst, Deborah, Pasha, Imad, Shen, Zili, Zhang, Jielai
Unbiased sky background modeling is crucial for the analysis of deep wide-field images, but it remains a major challenge in low surface brightness astronomy. Traditional image processing algorithms are often designed to produce artificially flat back
Externí odkaz:
http://arxiv.org/abs/2306.07922
Autor:
Buzzo, Maria Luisa, Forbes, Duncan A., Brodie, Jean P., Janssens, Steven R., Couch, Warrick J., Romanowsky, Aaron J., Gannon, Jonah S.
Prompted by the many controversial claims involving the NGC 1052 group, including that it hosts two dark matter-free galaxies with overluminous and monochromatic globular cluster (GC) systems, here we map out the large-scale structure (LSS) of GCs ov
Externí odkaz:
http://arxiv.org/abs/2303.16375
Autor:
Janssens, Steven R., Romanowsky, Aaron J., Abraham, Roberto, Brodie, Jean P., Couch, Warrick J., Forbes, Duncan A., Laine, Seppo, Martínez-Delgado, David, van Dokkum, Pieter G.
We investigate the isolated, quiescent ultra-diffuse galaxy (UDG) DGSAT I and its globular cluster (GC) system using two orbits of Hubble Space Telescope Advanced Camera for Surveys imaging in the F606W and F814W filters. This is the first study of G
Externí odkaz:
http://arxiv.org/abs/2209.09910
Autor:
Li, Dayi, Eadie, Gwendolyn M., Abraham, Roberto G., Brown, Patrick E., Harris, William E., Janssens, Steven R., Romanowsky, Aaron J., van Dokkum, Pieter, Danieli, Shany
We introduce a new method for detecting ultra-diffuse galaxies by searching for over-densities in intergalactic globular cluster populations. Our approach is based on an application of the log-Gaussian Cox process, which is a commonly used model in t
Externí odkaz:
http://arxiv.org/abs/2204.05487
Autor:
Janssens, Monique R. E.1 (AUTHOR) moniquejanssens@ethischbedrijf.nl
Publikováno v:
Animals (2076-2615). Sep2024, Vol. 14 Issue 18, p2643. 11p.
