Zobrazeno 1 - 10
of 281
pro vyhledávání: '"Andy Lawrence"'
Autor:
Chelsea L. MacLeod, Paul J. Green, Scott F. Anderson, Alastair Bruce, Michael Eracleous, Matthew Graham, David Homan, Andy Lawrence, Amy LeBleu, Nicolas P. Ross, John J. Ruan, Jessie Runnoe, Daniel Stern, William Burgett, Kenneth C. Chambers, Nick Kaiser, Eugene Magnier, Nigel Metcalfe
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 2, p 114 (2023)
Externí odkaz:
https://doaj.org/article/44cdb202734a4a86933eec7abb766bd5
Autor:
M. Pursiainen, Andy Lawrence, Iair Arcavi, Lluís Galbany, Jesper Sollerman, Claudia P. Gutiérrez, P. Short, Mariusz Gromadzki, Matt Nicholl, Giacomo Cannizzaro, T.-W. Chen, Peter G. Jonker, Francesca Onori, Stefano Benetti, G. Leloudas, Joseph P. Anderson, David Young, D. B. Malesani, P. Charalampopoulos, Thomas Wevers, Cosimo Inserra, T. E. Müller-Bravo
Publikováno v:
Astronomy & Astrophysics, 659, 1-30
Charalampopoulos, P, Leloudas, G, Malesani, D B, Wevers, T, Arcavi, I, Nicholl, M, Pursiainen, M, Lawrence, A, Anderson, J P, Benetti, S, Cannizzaro, G, Chen, T W, Galbany, L, Gromadzki, M, Gutiérrez, C P, Inserra, C, Jonker, P G, Müller-Bravo, T E, Onori, F, Short, P, Sollerman, J & Young, D R 2022, ' A detailed spectroscopic study of tidal disruption events ', Astronomy and Astrophysics, vol. 659, A34 . https://doi.org/10.1051/0004-6361/202142122
Astronomy & Astrophysics, 659, pp. 1-30
Charalampopoulos, P, Leloudas, G, Malesani, D B, Wevers, T, Arcavi, I, Nicholl, M, Pursiainen, M, Lawrence, A, Anderson, J P, Benetti, S, Cannizzaro, G, Chen, T W, Galbany, L, Gromadzki, M, Gutiérrez, C P, Inserra, C, Jonker, P G, Müller-Bravo, T E, Onori, F, Short, P, Sollerman, J & Young, D R 2022, ' A detailed spectroscopic study of tidal disruption events ', Astronomy and Astrophysics, vol. 659, A34 . https://doi.org/10.1051/0004-6361/202142122
Astronomy & Astrophysics, 659, pp. 1-30
Spectroscopically, tidal disruption events (TDEs) are characterized by broad (∼104 km s−1) emission lines and show a large diversity as well as different line profiles. After carefully and consistently performing a series of data reduction tasks
Publikováno v:
Homan, D, Macleod, C L, Lawrence, A, Ross, N P & Bruce, A 2020, ' Behaviour of the MgII 2798AA Line Over the Full Range of AGN Variability ', Monthly Notices of the Royal Astronomical Society, vol. 496, no. 1, pp. 309-327 . https://doi.org/10.1093/mnras/staa1467
We investigate the responsiveness of the 2798AA Mg II broad emission line in AGN on timescales of several years. Our study is based on a sample of extremely variable AGN as well as a broad population sample. The observed response of the line in previ
Autor:
David T. Maltby, Michael R. Merrifield, Omar Almaini, W. G. Hartley, Andy Lawrence, E. Elmer, Paul Hirst, I. Botti
Publikováno v:
Elmer, E, Almaini, O, Merrifield, M, Hartley, W G, Maltby, D T, Lawrence, A, Botti, I & Hirst, P 2020, ' Long-term NIR Variability in the UKIDSS Ultra Deep Survey : a new probe of AGN activity at high redshift ', Monthly Notices of the Royal Astronomical Society, vol. 493, no. 2, pp. 3026-3035 . https://doi.org/10.1093/mnras/staa381
We present the first attempt to select AGN using long-term NIR variability. By analysing the K-band light curves of all the galaxies in the UKIDSS Ultra Deep Survey, the deepest NIR survey over ~1 sq degree, we have isolated 393 variable AGN candidat
Autor:
Matt Nicholl, Daniel Lanning, Paige Ramsden, Brenna Mockler, Andy Lawrence, Phil Short, Evan J Ridley
Publikováno v:
Nicholl, M, Lanning, D, Ramsden, P, Mockler, B, Lawrence, A, Short, P & Ridley, E J 2022, ' Systematic light-curve modelling of TDEs : statistical differences between the spectroscopic classes ', Monthly Notices of the Royal Astronomical Society, vol. 515, no. 4, pp. 5604-5616 . https://doi.org/10.1093/mnras/stac2206
With the sample of observed tidal disruption events (TDEs) now reaching several tens, distinct spectroscopic classes have emerged: TDEs with only hydrogen lines (TDE-H), only helium lines (TDE-He), or hydrogen in combination with He II and often N II
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1166750447e8e17b04ad019f16ce9db
http://arxiv.org/abs/2201.02649
http://arxiv.org/abs/2201.02649
Autor:
Andy Lawrence, Meredith L. Rawls, Moriba Jah, Aaron Boley, Federico Di Vruno, Simon Garrington, Michael Kramer, Samantha Lawler, James Lowenthal, Jonathan McDowell, Mark McCaughrean
The shell bound by the Karman line at a height of 80 to 100km above the Earth's surface, and Geosynchronous Orbit, at 36,000km, is defined as the orbital space surrounding the Earth. It is within this region, and especially in Low Earth Orbit (LEO),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5f59b2db64fa58debf3e88721015291
Autor:
Andy Lawrence, Dominic J. Campopiano, Maria Stiblarikova, Irene De Silvestro, Catherine A McKenna
Publikováno v:
Mckenna, C A, Štiblariková, M, De Silvestro, I, Campopiano, D J & Lawrence, A L 2021, ' N-Phenylputrescine (NPP): A Natural Product Inspired Amine Donor for Biocatalysis ', Green Chemistry . https://doi.org/10.1039/D1GC02387J
The synthesis of chiral amines in enantioenriched form is a keystone reaction in applied chemical synthesis. There is a strong push to develop greener and more sustainable alternatives to the metal-catalysed methods currently used in the pharmaceutic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::214d805892d3012a8b45f2d18125648b
https://www.pure.ed.ac.uk/ws/files/251779857/20220204_Campopiano_d1gc02387j_VoR.pdf
https://www.pure.ed.ac.uk/ws/files/251779857/20220204_Campopiano_d1gc02387j_VoR.pdf
The bicyclo[2.2.2]diazaoctane alkaloids are a vast group of natural products which have been the focus of attention from the scientific community for several decades. This interest stems from their broad range of biological activities, their diverse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10a6cbfa36250b1469ea1f9390b1734f
https://doi.org/10.33774/chemrxiv-2021-mpvpg
https://doi.org/10.33774/chemrxiv-2021-mpvpg
Autor:
David J. Axon, Martin Elvis, Bradley M. Peterson, Rene W. Goosmann, Andrew Robinson, Andy Lawrence, R Campos, P. Lira, Makoto Kishimoto
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 507 (1), pp.579-593. ⟨10.1093/mnras/stab1751⟩
Lira, P, Kishimoto, M, Goosmann, R W, Campos, R, Axon, D, Elvis, M, Lawrence, A, Peterson, B M & Robinson, A 2021, ' Spectropolarimetry of NGC 3783 and Mrk 509: Evidence for powerful nuclear winds in Seyfert 1 Galaxies ', Monthly Notices of the Royal Astronomical Society, vol. 507, no. 1, pp. 579-593 . https://doi.org/10.1093/mnras/stab1751
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 507 (1), pp.579-593. ⟨10.1093/mnras/stab1751⟩
Lira, P, Kishimoto, M, Goosmann, R W, Campos, R, Axon, D, Elvis, M, Lawrence, A, Peterson, B M & Robinson, A 2021, ' Spectropolarimetry of NGC 3783 and Mrk 509: Evidence for powerful nuclear winds in Seyfert 1 Galaxies ', Monthly Notices of the Royal Astronomical Society, vol. 507, no. 1, pp. 579-593 . https://doi.org/10.1093/mnras/stab1751
We present results from high signal-to-noise optical spectropolarimetric observations of the Seyfert 1 galaxies NGC783 and Mrk509 in the 3500-7000 A range. We find complex structure in the polarized emission for both objects. In particular, Position
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f678d73aa3252fe3e2c59e7561b15b5
https://hal.archives-ouvertes.fr/hal-03337662
https://hal.archives-ouvertes.fr/hal-03337662
Publikováno v:
Microbiology
Uroporphyrinogen III, the universal progenitor of macrocyclic, modified tetrapyrroles, is produced from aminolaevulinic acid (ALA) by a conserved pathway involving three enzymes: porphobilinogen synthase (PBGS), hydroxymethylbilane synthase (HmbS) an