Search Publications
Scaling relations for globular cluster systems in early-type galaxies
Bassino, Lilia P.; Caso, Juan P.; Ennis, Ana I. +1 more
The formation and growth of globular cluster systems (GCSs) is closely related to the evolutionary processes experienced by their host galaxies. In particular, their radial distributions scale with several properties of the galaxies and their haloes. We performed a photometric study, by means of HST/ACS archival data of several intermediate lumino…
Spitzer Transit Follow-up of Planet Candidates from the K2 Mission
Gorjian, Varoujan; Tamura, Motohide; Knutson, Heather A. +21 more
We present precision 4.5 µ {{m}} Spitzer transit photometry of eight planet candidates discovered by the K2 mission: K2-52 b, K2-53 b, EPIC 205084841.01, K2-289 b, K2-174 b, K2-87 b, K2-90 b, and K2-124 b. The sample includes four sub-Neptunes and two sub-Saturns, with radii between 2.6 and 18 {R}\oplus and equilibrium temperatur…
HST Resolves Stars in a Tiny Body Falling on the Dwarf Galaxy DDO 68
Cignoni, M.; Tosi, M.; Calzetti, D. +9 more
We present new Hubble Space Telescope imaging of a stream-like system associated with the dwarf galaxy DDO 68, located in the Lynx-Cancer void at a distance of D ∼ 12.65 Mpc from us. The stream, previously identified in deep Large Binocular Telescope images as a diffuse low surface brightness structure, is resolved into individual stars in the F60…
KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin
Bieryla, Allyson; Latham, David W.; Berlind, Perry +53 more
We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of P =1.3866529+/- 0.0000027 days, a radius of {R}P={1.285}-0.071+0.12 {R}J, and a relatively large mass …
JINGLE, a JCMT legacy survey of dust and gas for galaxy evolution studies: II. SCUBA-2 850 µm data reduction and dust flux density catalogues
Lamperti, Isabella; Saintonge, Amélie; Clark, Christopher J. R. +33 more
We present the SCUBA-2 850µm component of JINGLE, the new JCMT large survey for dust and gas in nearby galaxies, which with 193 galaxies is the largest targeted survey of nearby galaxies at 850 µm. We provide details of our SCUBA-2 data reduction pipeline, optimized for slightly extended sources, and including a calibration model adjus…
Signatures of Magnetic Reconnection at the Footpoints of Fan-shaped Jets on a Light Bridge Driven by Photospheric Convective Motions
Cao, Wenda; Nóbrega-Siverio, Daniel; Li, Dong +5 more
Dynamical jets are generally found on light bridges (LBs), which are key to studying sunspot decay. So far, their formation mechanism is not fully understood. In this paper, we used state-of-the-art observations from the Goode Solar Telescope, the Interface Region Imaging Spectrograph, the Spectro-polarimeter on board Hinode, and the Atmospheric I…
Dust properties in the cold and hot gas phases of the ATLAS3D early-type galaxies as revealed by AKARI
Kaneda, H.; Murata, K.; Yamagishi, M. +6 more
Context. The properties of the dust in the cold and hot gas phases of early-type galaxies (ETGs) are key to understanding ETG evolution.
Aims: We aim to conduct a systematic study of the dust in a large sample of local ETGs, focusing on relations between the dust and the molecular, atomic, and X-ray gas of the galaxies, as well as their envir…
Are Solar Energetic Particle Events and Type II Bursts Associated with Fast and Narrow Coronal Mass Ejections?
Gopalswamy, N.; Kahler, S. W.; Ling, A. G.
Gradual solar energetic (E >10 MeV) particle (SEP) events and metric through kilometric wavelength type II radio bursts are usually associated with shocks driven by fast (V ≥900 kms−1) and wide (W ≥60∘) coronal mass ejections (FW CMEs). This criterion was established empirically by several studies from solar cycle 23. The …
Discovery of a pulsar-powered bow shock nebula in the Small Magellanic Cloud supernova remnant DEM S5
Haberl, F.; Filipović, M. D.; Kothes, R. +32 more
We report the discovery of a new Small Magellanic Cloud pulsar wind nebula (PWN) at the edge of the supernova remnant (SNR) DEM S5. The pulsar powered object has a cometary morphology similar to the Galactic PWN analogues PSR B1951+32 and `the mouse'. It is travelling supersonically through the interstellar medium. We estimate the pulsar kick velo…
Suprathermal Ion Backgrounds of Solar Energetic Particle Events
Kahler, S. W.; Ling, A. G.
Gradual solar energetic particle (SEP) events result from the acceleration of low-energy suprathermal seed particles to high (E > 10 MeV nuc-1) energies by shocks driven by coronal mass ejections (CMEs). Several studies suggest connections between suprathermal particles measured in situ at 1 au and the seed particles accelerated near…