Measuring the 2D baryon acoustic oscillation signal of galaxies in WiggleZ: cosmological constraints [0.03%]
二维bao标度测量及其宇宙学应用——wigglez巡天初步结果
Samuel R Hinton,Eyal Kazin,Tamara M Davis et al.
Samuel R Hinton et al.
We present results from the 2D anisotropic baryon acoustic oscillation (BAO) signal present in the final data set from the WiggleZ Dark Energy Survey. We analyse the WiggleZ data in two ways: first using the full shape of the 2D correlation...
The winds from HL Tau [0.03%]
HL Tau的星周盘风
P D Klaassen,J C Mottram,L T Maud et al.
P D Klaassen et al.
Outflowing motions, whether a wind launched from the disc, a jet launched from the protostar, or the entrained molecular outflow, appear to be a ubiquitous feature of star formation. These outwards motions have a number of root causes, and ...
Xian Chen,Germán Arturo Gómez-Vargas,James Guillochon
Xian Chen
A star wandering too close to a supermassive black hole (SMBH) will be tidally disrupted. Previous studies of such 'tidal disruption event' (TDE) mostly focus on the stellar debris that are bound to the system, because they give rise to lum...
Collision velocity of dust grains in self-gravitating protoplanetary discs [0.03%]
具有自引力的原行星盘中尘埃颗粒的碰撞速度
Richard A Booth,Cathie J Clarke
Richard A Booth
We have conducted the first comprehensive numerical investigation of the relative velocity distribution of dust particles in self-gravitating protoplanetary discs with a view to assessing the viability of planetesimal formation via direct c...
An apodized Kepler periodogram for separating planetary and stellar activity signals [0.03%]
一种分离行星和恒星活动信号的Kepler型аподизированная期图法
Philip C Gregory
Philip C Gregory
A new apodized Keplerian (AK) model is proposed for the analysis of precision radial velocity (RV) data to model both planetary and stellar activity (SA) induced RV signals. A symmetrical Gaussian apodization function with unknown width and...
Line-driven ablation of circumstellar discs - I. Optically thin decretion discs of classical Oe/Be stars [0.03%]
线驱动的经典Oe/Be星的光疏散盘的剥离效应Ⅰ——光学薄盘研究
Nathaniel Dylan Kee,Stanley Owocki,J O Sundqvist
Nathaniel Dylan Kee
The extreme luminosities of massive, hot OB stars drive strong stellar winds through line-scattering of the star's UV continuum radiation. For OB stars with an orbiting circumstellar disc, we explore here the effect of such line-scattering ...
FR II radio galaxies at low frequencies - I. Morphology, magnetic field strength and energetics [0.03%]
低频的FR II射电星系－Ⅰ．形态、磁场和能量学
Jeremy J Harwood,Judith H Croston,Huib T Intema et al.
Jeremy J Harwood et al.
Due to their steep spectra, low-frequency observations of Fanaroff-Riley type II (FR II) radio galaxies potentially provide key insights in to the morphology, energetics and spectrum of these powerful radio sources. However, limitations imp...
Forming supermassive black hole seeds under the influence of a nearby anisotropic multifrequency source [0.03%]
各向异性和多频率附近光源影响下超大质量黑洞种子的形成
John A Regan,Peter H Johansson,John H Wise
John A Regan
The photodissociation of H2 by a nearby anisotropic source of radiation is seen as a critical component in creating an environment in which a direct collapse black hole may form. Employing radiative transfer we model the effect of multifreq...
Direct collapse to supermassive black hole seeds: comparing the AMR and SPH approaches [0.03%]
直接坍缩形成超大质量黑洞种子：比较自适应网格和光滑粒子方法
Yang Luo,Kentaro Nagamine,Isaac Shlosman
Yang Luo
We provide detailed comparison between the adaptive mesh refinement (AMR) code enzo-2.4 and the smoothed particle hydrodynamics (SPH)/N-body code gadget-3 in the context of isolated or cosmological direct baryonic collapse within dark matte...
New methods to constrain the radio transient rate: results from a survey of four fields with LOFAR [0.03%]
用LOFAR对四个星天区进行的巡天研究得出新的限制_radio暂现源出现率的方法
D Carbone,A J van der Horst,R A M J Wijers et al.
D Carbone et al.
We report on the results of a search for radio transients between 115 and 190 MHz with the LOw-Frequency ARray (LOFAR). Four fields have been monitored with cadences between 15 min and several months. A total of 151 images were obtained, gi...