Search Publications
Missions
Journals
Publication Years
A new photometric study of Herbig Ae/Be stars in the infrared
Zhang, P.; Chen, P. S.; Shan, H. G.
In this paper we collected almost all HAeBe stars known so far (253 sources in total) to photometrically study their infrared properties. The 2MASS, WISE, IRAS and AKARI data are employed to make analyses. It is shown from several two-color diagrams that from 1 µm to 60 µm infrared radiations from circumstellar disks with the power law…
Firedec: a two-channel finite-resolution image deconvolution algorithm
Jablonka, P.; Meylan, G.; Courbin, F. +2 more
We present a two-channel deconvolution method that decomposes images into a parametric point-source channel and a pixelized extended-source channel. Based on the central idea of the deconvolution algorithm proposed by Magain et al. (1998, ApJ, 494, 472), the method aims at improving the resolution of the data rather than at completely removing the…
Recurrent pulsations in Saturn's high latitude magnetosphere
Hospodarsky, G. B.; Kurth, W. S.; Mitchell, D. G. +5 more
Over the course of about 6 h on Day 129, 2008, the UV imaging spectrograph (UVIS) on the Cassini spacecraft observed a repeated intensification and broadening of the high latitude auroral oval into the polar cap. This feature repeated at least 5 times with about a 1 h period, as it rotated in the direction of corotation, somewhat below the planeta…
IROCKS: Spatially Resolved Kinematics of z ∼ 1 Star-forming Galaxies
Juneau, Stéphanie; Salim, Samir; Armus, Lee +4 more
We present results from the Intermediate Redshift OSIRIS Chemo-Kinematic Survey (IROCKS) for sixteen z ∼ 1 and one z ∼ 1.4 star-forming galaxies. All galaxies were observed with OSIRIS with the laser guide star adaptive optics system at Keck Observatory. We use rest-frame nebular Hα emission lines to trace morphologies and kinematics of ionized ga…
The mass fraction of AGN and the Fundamental Plane of black hole activity from a large X-ray-selected sample of LINERs
Best, P. N.; Nisbet, D. M.
A sample of 576 X-ray-selected LINERs was constructed by combining data from the 3XMM-DR4 and SDSS-DR7 catalogues. The sample was used to investigate the fraction of galaxies hosting a LINER, finding that the fraction is a strong function of both stellar mass and black hole mass (increasing as {f_LINER ∝ M^{1.6 ± 0.2}_{*}} and {f_LINER ∝ M^{0.6 ± …
ROSETTA lander Philae: Touch-down reconstruction
Roll, Reinhard; Witte, Lars
The landing of the ROSETTA-mission lander Philae on November 12th 2014 on Comet 67 P/Churyumov-Gerasimenko was planned as a descent with passive landing and anchoring by harpoons at touch-down. Actually the lander was not fixed at touch-down to the ground due to failing harpoons. The lander internal damper was actuated at touch-down for 42.6 mm wi…
HST imaging of the dusty filaments and nucleus swirl in NGC4696 at the centre of the Centaurus Cluster
Fabian, A. C.; Reynolds, C. S.; Pinto, C. +14 more
Narrow-band HST imaging has resolved the detailed internal structure of the 10 kpc diameter H α+[N II] emission line nebulosity in NGC4696, the central galaxy in the nearby Centaurus cluster, showing that the dusty, molecular, filaments have a width of about 60 pc. Optical morphology and velocity measurements indicate that the filaments are dragge…
Decimetre-scaled spectrophotometric properties of the nucleus of comet 67P/Churyumov-Gerasimenko from OSIRIS observations
Jorda, L.; Lamy, P. L.; Bertaux, J. -L. +55 more
We present the results of the photometric and spectrophotometric properties of the 67P/Churyumov-Gerasimenko nucleus derived with the Optical, Spectroscopic and Infrared Remote Imaging System instrument during the closest fly-by over the comet, which took place on 2015 February 14 at a distance of ∼6 km from the surface. Several images covering th…
Properties of massive star-forming clumps with infall motions
Zhou, Jian-Jun; Wu, Gang; Esimbek, Jarken +7 more
In this work, we aim to characterize high-mass clumps with infall motions. We selected 327 clumps from the Millimetre Astronomy Legacy Team 90-GHz survey, and identified 100 infall candidates. Combined with the results of He et al., we obtained a sample of 732 high-mass clumps, including 231 massive infall candidates and 501 clumps where infall is…
The Peculiar Debris Disk of HD 111520 as Resolved by the Gemini Planet Imager
Matthews, Brenda C.; Duchêne, Gaspard; Oppenheimer, Rebecca +33 more
Using the Gemini Planet Imager, we have resolved the circumstellar debris disk around HD 111520 at a projected range of ∼30-100 AU in both total and polarized H-band intensity. The disk is seen edge-on at a position angle of 165° along the spine of emission. A slight inclination and asymmetric warp are covariant and alter the interpretation of the…