Zobrazeno 1 - 10
of 10 007
pro vyhledávání: '"Douglas, N."'
The origin of planetary mass objects (PMOs) wandering in young star clusters remains enigmatic, especially when they come in pairs. They could represent the lowest-mass object formed via molecular cloud collapse or high-mass planets ejected from thei
Externí odkaz:
http://arxiv.org/abs/2410.21180
Recon-all-clinical: Cortical surface reconstruction and analysis of heterogeneous clinical brain MRI
Autor:
Gopinath, Karthik, Greve, Douglas N., Magdamo, Colin, Arnold, Steve, Das, Sudeshna, Puonti, Oula, Iglesias, Juan Eugenio
Surface-based analysis of the cerebral cortex is ubiquitous in human neuroimaging with MRI. It is crucial for cortical registration, parcellation, and thickness estimation. Traditionally, these analyses require high-resolution, isotropic scans with g
Externí odkaz:
http://arxiv.org/abs/2409.03889
Massive stars may form in or be captured into AGN disks. Recent 1D studies employing stellar-evolution codes have demonstrated the potential for rapid growth of such stars through accretion up to a few hundred $M_\odot$. We perform 3D radiation hydro
Externí odkaz:
http://arxiv.org/abs/2408.12017
Star-forming regions, characterized by dense environments, experience frequent encounters that significantly influence binary systems, leading to their hardening, softening, or ionization. We extend the Hut \& Bahcall formalism to derive an analytica
Externí odkaz:
http://arxiv.org/abs/2407.20416
Migration commonly occurs during the epoch of planet formation. For emerging gas giant planets, it proceeds concurrently with their growth through the accretion of gas from their natal protoplanetary disks. Similar migration process should also be ap
Externí odkaz:
http://arxiv.org/abs/2406.12716
Context. About 25% -- 50% of white dwarfs are found to be contaminated by heavy elements, which are believed to originate from external sources such as planetary materials. Elemental abundances suggest that most of the pollutants are rocky objects an
Externí odkaz:
http://arxiv.org/abs/2405.17853
Autor:
Chen, Yi-Xian, Lin, Douglas N. C.
Gravitational instability in the outskirts of Active Galactic Nuclei (AGN) disks lead to disk fragmentation and formation of super-massive (several 10^2Msun) stars with potentially long lifetimes. Alternatively, stars can be captured ex-situ and grow
Externí odkaz:
http://arxiv.org/abs/2404.08780
Autor:
Nayakshin, Sergei, de Miera, Fernando Cruz Saenz, Kospal, Agnes, Calovic, Aleksandra, Eisloffel, Jochen, Lin, Douglas N. C.
In the classical grouping of large magnitude episodic variability of young accreting stars, FUORs outshine their stars by a factor of $\sim$ 100, and can last for up to centuries; EXORs are dimmer, and last months to a year. A disc Hydrogen ionisatio
Externí odkaz:
http://arxiv.org/abs/2403.04439
Dust trapping in the global pressure bump induced by magnetospheric truncation offers a promising formation mechanism for close-in super-Earths/sub-Neptunes. These planets likely form in evolved protoplanetary discs, where the gas temperature at the
Externí odkaz:
http://arxiv.org/abs/2402.14463
Autor:
Zhuang, Ming-Yang, Yang, Qian, Shen, Yue, Adamow, Monika, Friedel, Douglas N., Gruendl, R. A., Liu, Xin, Martini, Paul, Abbott, Timothy M. C., Anderson, Scott F., Assef, Roberto J., Bauer, Franz E., Bielby, Rich, Brandt, W. N., Burke, Colin J., Casares, Jorge, Chen, Yu-Ching, De Rosa, Gisella, Drlica-Wagner, Alex, Dwelly, Tom, Eltvedt, Alice, Alvarez, Gloria Fonseca, Fu, Jianyang, Fuentes, Cesar, Graham, Melissa L., Grier, Catherine J., Golovich, Nathan, Hall, Patrick B., Hartigan, Patrick, Horne, Keith, Koekemoer, Anton M., Krumpe, Mirko, Li, Jennifer I., Lidman, Chris, Malik, Umang, Mangian, Amelia, Merloni, Andrea, Ricci, Claudio, Salvato, Mara, Sharp, Rob, Stone, Zachary, Trilling, David E., Tucker, Brad E., Wen, Di, Wideman, Zachary, Xue, Yongquan, Yu, Zhefu, Zucker, Catherine
High-quality Extragalactic Legacy-field Monitoring (HELM) is a long-term observing program that photometrically monitors several well-studied extragalactic legacy fields with the Dark Energy Camera (DECam) imager on the CTIO 4m Blanco telescope. Sinc
Externí odkaz:
http://arxiv.org/abs/2402.06052