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We present a new 3D point-based detector model, named Shift-SSD, for precise 3D object detection in autonomous driving. Traditional point-based 3D object detectors often employ architectures that rely on a progressive downsampling of…

计算机视觉与模式识别 · 计算机科学 2024-03-12 Zhili Chen , Kien T. Pham , Maosheng Ye , Zhiqiang Shen , Qifeng Chen

We present an overview of, and first science results from, the Magellanic Edges Survey (MagES), an ongoing spectroscopic survey mapping the kinematics of red clump and red giant branch stars in the highly substructured periphery of the…

星系天体物理 · 物理学 2020-07-22 L. R. Cullinane , A. D. Mackey , G. S. Da Costa , S. E. Koposov , V. Belokurov , D. Erkal , A. Koch , A. Kunder , D. M. Nataf

We have developed a new model for analysing light curves of planetary transits when there are starspots on the stellar disc. Because the parameter space contains a profusion of local minima we developed a new optimisation algorithm which…

地球与行星天体物理 · 物理学 2015-06-12 Jeremy Tregloan-Reed , John Southworth , C. Tappert

We present 3D kinematic observations of stars within the central 0.5 pc of the Milky Way nuclear star cluster using adaptive optics imaging and spectroscopy from the Keck telescopes. Recent observations have shown that the cluster has a…

星系天体物理 · 物理学 2015-06-17 T. Do , G. D. Martinez , S. Yelda , A. M. Ghez , J. Bullock , M. Kaplinghat , J. R. Lu , A. G. H. Peter , K. Phifer

We present kinematical analyses of 22 Galactic globular clusters using the Hubble Space Telescope proper motion (HSTPROMO) catalogues recently presented in Bellini et al. (2014). For most clusters, this is the first proper-motion study ever…

星系天体物理 · 物理学 2015-06-23 Laura L. Watkins , Roeland P. van der Marel , Andrea Bellini , Jay Anderson

High-resolution Hubble Space Telescope (HST) archive imaging and high-dispersion spectroscopy are used to study the complex morphological and kinematical structure of the planetary nebula, NGC 2818. We analyze narrow band H{\alpha}, [O…

太阳与恒星天体物理 · 物理学 2015-06-04 Roberto Vázquez

It has been suggested since recent time that the magnitude of the interaction between galaxies could be measured from the level of kinematic disturbance of their outer regions with respect to the innermost ones. Here, I proved that the…

星系天体物理 · 物理学 2026-01-26 Andrés E. Piatti

We utilize the Sloan Digital Sky Survey (SDSS) extended Baryon Oscillation Spectroscopic Survey (eBOSS) and Baryon Oscillation Spectroscopic Survey (BOSS) catalogs with precise spectroscopic redshifts to estimate the kinematic redshift…

宇宙学与河外天体物理 · 物理学 2024-11-14 Prabhakar Tiwari , Dominik J. Schwarz , Gong-Bo Zhao , Ruth Durrer , Martin Kunz , Hamsa Padmanabhan

Aims. This is the second in a series of papers that attempt to unveil the kinematic structure of the Galactic bulge through studying radial velocities and proper motions. We report here ~15000 new proper motions for three low…

星系天体物理 · 物理学 2015-06-19 Mario Soto , Hugo Zeballos , Konrad Kuijken , R. Michael Rich , Andrea Kunder , Tri Astraatmadja

Abandoning the assumption that light traces mass, I seek the location of the center of the Local Group of galaxies based solely on kinematic data and the plausible assumption of infall. The available set of positions and radial velocities…

星系天体物理 · 物理学 2015-06-22 Alan B. Whiting

Using young open clusters and O--B2-type stars in~\emph{Gaia}~DR3, we investigate the kinematics of the local spiral structure. In general, the young sources in the outer spiral arms may present larger peculiar motions than those in the…

星系天体物理 · 物理学 2023-08-25 Dejian Liu , Ye Xu , Chaojie Hao , Shuaibo Bian , Zehao Lin , Yingjie Li , Jingjing Li

A new method to extract high resolution angular distributions from kinematical coincidence measurements in binary reactions is presented. Kinematic is used to extract the center of mass angular distribution from the measured energy spectrum…

This paper reports the discovery of evidence for physical contact between the Galactic circumnuclear disk (CND) and an exterior giant molecular cloud. The central 10 pc of our Galaxy has been imaged in the HCN J=1-0, HCO+ J=1-0, CS J=2-1,…

星系天体物理 · 物理学 2017-01-18 Shunya Takekawa , Tomoharu Oka , Kunihiko Tanaka

Within the central 10pc of our Galaxy lies a dense nuclear star cluster (NSC), and similar NSCs are found in most nearby galaxies. Studying the structure and kinematics of NSCs reveals the history of mass accretion of galaxy nuclei. Because…

This paper discusses the location of a sample of planetary nebulae on the HR diagram. We determine the internal velocity fields of 14 planetary nebulae from high-resolution echelle spectroscopy, with the help of photoionization models. The…

天体物理学 · 物理学 2008-11-26 Krzysztof Gesicki , Agnes Acker , Albert A. Zijlstra

We present the third installment of the Yale/San Juan Southern Proper Motion Catalog, SPM3. Absolute proper motions, positions, and photographic B,V photometry are given for roughly 10.7 million objects, primarily stars, down to a magnitude…

天体物理学 · 物理学 2009-11-10 T. M. Girard , D. I. Dinescu , W. F. van Altena , I. Platais , D. G. Monet , C. E. Lopez

We have derived absolute proper motions of the entire Galactic bulge region from VIRAC and Gaia. We present these as both integrated on-sky maps and, after isolating standard candle red clump (RC) stars, as a function of distance using RC…

星系天体物理 · 物理学 2019-12-06 Jonathan P. Clarke , Christopher Wegg , Ortwin Gerhard , Leigh C. Smith , Phil W. Lucas , Shola M. Wylie

With the objective of improving the registration of LiDAR point clouds produced by kinematic scanning systems, we propose a novel trajectory adjustment procedure that leverages on the automated extraction of selected reliable 3D…

机器人学 · 计算机科学 2022-01-04 Aurélien Brun , Davide Antonio Cucci , Jan Skaloud

We have measured gas and stellar velocity dispersions in 5 circumnuclear starforming regions (CNSFRs) and the nucleus of the barred spiral galaxy NGC 3351. The stellar dispersions have been obtained from high resolution spectra of the CaT…

We compile and analyze ~200 trigonometric parallaxes and proper motions of molecular masers associated with very young high-mass stars. These measurements strongly suggest that the Milky Way is a four-arm spiral. Fitting log-periodic…