Search

Now showing items 41-50 of 1901

A flat trend of star-formation rate with X-ray luminosity of galaxies hosting AGN in the SCUBA-2 Cosmology Legacy Survey

Ramasawmy, Joanna; Stevens, Jason; Martin, Garreth; Geach, James E. (2019-07-01)

Feedback processes from active galactic nuclei (AGN) are thought to play a crucial role in regulating star formation in massive galaxies. Previous studies using Herschel have resulted in conflicting conclusions as to whether ...

Constraints on positron annihilation kinematics in the inner Galaxy

Siegert, Thomas; Crocker, Roland M.; Diehl, Roland; Krause, Martin G. H.; Panther, Fiona H.; Pleintinger, Moritz M. M.; Weinberger, Christoph (2019-07-01)

Context. The annihilation of cosmic positrons with electrons in the interstellar medium results in the strongest persistent γ-ray line signal in the sky. For the past 50 yr, this 511 keV emission - predominantly from the ...

Ongoing astrometric microlensing events from VVV and Gaia

McGill, Peter; Smith, Leigh C.; Evans, N. Wyn; Belokurov, Vasily; Lucas, Philip W. (2019-07)

We extend predictive microlensing event searches using the Vista Variables in the Via Lactea survey and the second Gaia data release. We identify two events with maxima in 2019 that require urgent follow-up. First, we ...

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

Smith, Matthew W. L.; Clark, Christopher J. R.; Looze, Ilse De; Lamperti, Isabella; Saintonge, Amélie; Wilson, Christine D.; Accurso, Gioacchino; Brinks, Elias; Bureau, Martin; Chung, Eun Jung; Cigan, Phillip J.; Clements, David L.; Dharmawardena, Thavisha; Fanciullo, Lapo; Gao, Yang; Gao, Yu; Gear, Walter K.; Gomez, Haley L.; Greenslade, Joshua; Hwang, Ho Seong; Kemper, Francisca; Lee, Jong Chul; Li, Cheng; Lin, Lihwai; Liu, Lijie; Molnár, Dániel Cs; Mok, Angus; Pan, Hsi-An; Sargent, Mark; Scicluna, Peter; Smith, Connor M. A.; Urquhart, Sheona; Williams, Thomas G.; Xiao, Ting; Yang, Chentao; Zhu, Ming (2019-07-01)

We present the SCUBA-2 850μ m 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 μ m. We provide details of ...

Unveiling the 100 pc scale nuclear radio structure of NGC 6217 with e-MERLIN and the VLA

Williams, David R. A.; McHardy, Ian M.; Baldi, Ranieri D.; Beswick, Robert J.; Pahari, Mayukh; Argo, Megan K.; Beri, Aru; Boorman, Peter; Brinks, Elias; Dullo, Bililign T.; Fenech, Danielle M.; Ineson, Judith; Kharb, Preeti; Knapen, Johan H.; Muxlow, Tom W. B.; Westcott, Jonathan (2019-07-01)

We present high-sensitivity 1.51 GHz e-MERLIN (e-Multi-Element Radio-Linked Interferometer Network) radio images of the nearby galaxy NGC6217. We resolve the compact radio source at the centre of NGC6217 for the first time, ...

Efficient Follow-Up of Exoplanet Transits Using Small Telescopes

Beck, Peter; Robson, Luke; Gallaway, Mark; Jones, Hugh R. A.; Campbell, David (2019-06-21)

Here, we introduce an online tool for the prediction of exoplanet transit light curves. Small telescopes can readily capture exoplanet transits under good weather conditions when the combination of a bright star and a large ...

Automated, unsupervised inversion of multiwavelength lidar data with TiARA : Assessment of retrieval performance of microphysical parameters using simulated data

Mueller, Detlef; Chemyakin, Eduard V.; Kolgotin, Alexei V.; Ferrare, Richard A.; Hostetler, Chris A.; Romanov, A. (2019-06-18)

We evaluate the retrieval performance of the automated, unsupervised inversion algorithm, Tikhonov Advanced Regularization Algorithm (TiARA), which is used for the autonomous retrieval of microphysical parameters of ...

Search for nearby Earth analogs I. 15 planet candidates found in PFS data

Feng, Fabo; Crane, Jeffrey D.; Wang, Sharon Xuesong; Teske, Johanna K.; Shectman, Stephen A.; Díaz, Matías R.; Thompson, Ian B.; Jones, Hugh R. A.; Butler, R. Paul (2019-06-17)

The radial velocity (RV) method plays a major role in the discovery of nearby exoplanets. To efficiently find planet candidates from the data obtained in high-precision RV surveys, we apply a signal diagnostic framework ...

A High Speed Particle Phase Discriminator (PPD-HS) for the classification of airborne particles, as tested in a continuous flow diffusion chamber

Mahrt, Fabian; Wieder, Jorg; Dietlicher, Remo; Smith, Helen R.; Stopford, Chris; Kanji, Zamin (2019-06-14)

A new instrument, the High Speed Particle Phase Discriminator (PPD-HS) developed at the University of Hertfordshire, for sizing individual cloud hydrometeors and determining their phase is described herein. PPD-HS performs ...

An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field : Source catalogue and properties

Stach, S. M.; Dudzevičiūtė, U.; Smail, I.; Swinbank, A. M.; Geach, J. E.; An, F. X.; Almaini, O.; Arumugam, V.; Blain, A. W.; Chapman, S. C.; Conselice, C. J.; Cooke, E. A.; Coppin, K. E. K.; Cunha, E. da; Dunlop, J. S.; Farrah, D.; Gullberg, B.; Hodge, J. A.; Ivison, R. J.; Kocevski, Dale D.; Michałowski, M. J.; Miyaji, Takamitsu; Scott, D.; Wardlow, J. L.; Weiss, Axel; Werf, P. van der (2019-06-06)

We present the catalogue and basic properties of sources in AS2UDS, an 870-\mum continuum survey with the Atacama Large Millimetre/sub-millimetre Array (ALMA) of 716 single-dish sub-millimetre sources detected in the ...

1
. . .
2
3
4
5
6
7
8
. . .
191