| |
Records |
Links |
|
Author |
Karl-Ludwig Klein, Sophie Musset, Nicole Vilmer, Carine Briand, Säm Krucker, Andrea Francesco Battaglia, Nina Dresing, Christian Palmroos, Dale E. Gary |
|
| |
Title |
The relativistic solar particle event on 28 October 2021: Evidence of particle acceleration within and escape from the solar corona |
Type |
Journal |
| |
Year  |
2023 |
Publication |
Astronomy & Astrophysics |
Abbreviated Journal |
|
|
| |
Volume |
663 |
Issue |
|
Pages |
A173 |
|
| |
Keywords |
|
|
| |
Abstract |
Aims. We analyse particle, radio, and X-ray observations during the first relativistic proton event of solar cycle 25 detected on Earth. The aim is to gain insight into the relationship between relativistic solar particles detected in space and the processes of acceleration and propagation in solar eruptive events.Methods. To this end, we used ground-based neutron monitor measurements of relativistic nucleons and space-borne measurements of electrons with similar speed to determine the arrival times of the first particles at 1 AU and to infer their solar release times. We compared the release times with the time histories of non-thermal electrons in the solar atmosphere and their escape to interplanetary space, as traced by radio spectra and X-ray light curves and images.Results. Non-thermal electrons in the corona are found to be accelerated in different regions. Some are confined in closed magnetic structures expanding during the course of the event. Three episodes of electron escape to the interplanetary space are revealed by groups of decametric-to-kilometric type III bursts. The first group appears on the low-frequency side of a type II burst produced by a coronal shock wave. The two latter groups are accompanied at higher frequencies by bursts with rapid drifts to both lower and higher frequencies (forward- or reverse-drifting bursts). They are produced by electron beams that propagate both sunward and anti-sunward. The first relativistic electrons and nucleons observed near Earth are released with the third group of type III bursts, more than ten minutes after the first signatures of non-thermal electrons and of the formation of the shock wave in the corona. Although the eruptive active region is near the central meridian, several tens of degrees east of the footpoint of the nominal Parker spiral to the Earth, the kilometric spectrum of the type III bursts and the in situ detection of Langmuir waves demonstrate a direct magnetic connection between the L1 Lagrange point and the field lines onto which the electron beams are released at the Sun.Conclusions. We interpret the forward- and reverse-drifting radio bursts as evidence of reconnection between the closed expanding magnetic structures of an erupting flux rope and ambient open magnetic field lines. We discuss the origin of relativistic particles near the Earth across two scenarios: (1) acceleration at the CME-driven shock as it intercepts interplanetary magnetic field lines rooted in the western solar hemisphere and (2) an alternative where the relativistic particles are initially confined in the erupting magnetic fields and get access to the open field lines to the Earth through these reconnection events. |
|
| |
Programme |
227 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
0004-6361, 1432-0746 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8441 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Kenta Ohara, Yuji Yagi, Shinji Yamashita, Ryo Okuwaki, Shiro Hirano, Yukitoshi Fukahata |
|
| |
Title |
Complex evolution of the 2016 Kaikoura earthquake revealed by teleseismic body waves |
Type |
Journal |
| |
Year |
2023 |
Publication |
Progress in Earth and Planetary Science |
Abbreviated Journal |
|
|
| |
Volume |
10 |
Issue |
1 |
Pages |
35 |
|
| |
Keywords |
Body waves Earthquake dynamics Earthquake source observation Waveform inversion |
|
| |
Abstract |
The 2016 Kaikoura earthquake, New Zealand, ruptured more than a dozen faults, making it difficult to prescribe a model fault for analyzing the event by inversion. To model this earthquake from teleseismic records, we used a potency density tensor inversion, which projects multiple fault slips onto a single model fault plane, reducing the non-uniqueness due to the uncertainty in selecting the faults’ orientations. The resulting distribution of potency-rate density tensors is consistent with observed surface ruptures. In its initial stage, the rupture propagated northeastward primarily at shallow depths. Later, the rupture propagated northeastward at greater depths beneath a gap in reported surface ruptures. The main rupture phase started in the northeastern part of the Kekerengu fault after 50 s and propagated bilaterally to the northeast and southwest. The non-double-couple component grew to a large fraction of the source elements as the rupture went through the junction of the Jordan Thrust and the Papatea fault, which suggests that the rupture branched into both faults as it back-propagated toward the southwest. The potency density tensor inversion sheds new light on the irregular evolution of this earthquake, which produced a fault rupture pattern of unprecedented complexity. Our source model of the 2016 Kaikoura earthquake (e.g., back-rupture propagation) could prompt research to determine a more realistic model with segmented faults using near-field data. |
|
| |
Programme |
133 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
2197-4284 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8531 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Kozue Shiomi, Katsufumi Sato, Charles A. Bost, Yves Handrich |
|
| |
Title |
Stay the course: maintenance of consistent orientation by commuting penguins both underwater and at the water surface |
Type |
Journal |
| |
Year |
2023 |
Publication |
Marine Biology |
Abbreviated Journal |
|
|
| |
Volume |
170 |
Issue |
4 |
Pages |
42 |
|
| |
Keywords |
Bearing Compass Diving bird Navigation Orientation |
|
| |
Abstract |
Many marine vertebrates traverse more than hundreds of kilometres of the ocean. To efficiently achieve such long-distance movements, the ability to maintain orientation in a three-dimensional space is essential; however, it remains unevaluated in most species. In this study, we examined the bearing distributions of penguins undertaking long-distance foraging trips and compared their bearing consistency between underwater and at the water surface, as well as between night and day, to quantify their orientation ability. The subject species, king penguins, Aptenodytes patagonicus, from Possession Island, Crozet archipelago (46°25′S, 51°45′E; January to March 2011), showed high bearing consistency both during dives and at the water surface whilst commuting towards/from their main foraging area, the Antarctic polar front. Their bearing consistency was particularly high during and after shallow dives, irrespective of the time of day. Meanwhile, their bearings tended to vary during and after deep dives, particularly in the middle of the trip, probably owing to underwater foraging movements. However, the overall directions of deep dives during the commuting phases were similar to those of shallow dives and post-dive periods at the water surface. These findings indicate that king penguins employ compass mechanism(s) that are equivalently reliable both underwater and at the water surface, at any time of the day. This orientation ability appears to enable them to achieve long-distance trips under strong temporal constraints. Further studies on the fine-scale bearing distributions of other diving vertebrates are needed to better understand movement strategies in marine environments. |
|
| |
Programme |
394 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
1432-1793 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8697 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Le Bris T., Barruol, G., Gimbert F., Le Meur E., Zigone, D. |
|
| |
Title |
Cryosismicité du glacier de l’Astrolabe : glissement basal, fracturation et modulation tidale |
Type |
Peer-reviewed symposium |
| |
Year |
2023 |
Publication |
19émes journées scientifiques du cnfra, 03-05 mai 2023, paris france |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
Communication n°466 |
Pages |
|
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Programme |
1214 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8669 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Le Scornec E. |
|
| |
Title |
Emperor penguin demography: contributions of recent capture-mark-recapture surveys |
Type |
Master 2 |
| |
Year |
2023 |
Publication |
Master 2 |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
|
Pages |
|
|
| |
Keywords |
|
|
| |
Abstract |
Cosupervision: Barbraud &Amp; le Bohec |
|
| |
Programme |
137 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8719 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Lemonnier C., Bize P., Stier A., Cillard A., Montblanc M., Robin J-p., Handrich Y., Bost C-a., Viblanc V. |
|
| |
Title |
Compensating for harsh conditions at sea: plasticity of king penguin foraging strategies facing an experimental increase in workload |
Type |
Peer-reviewed symposium |
| |
Year |
2023 |
Publication |
11th International Penguin Conference., 4-9 September 2023., Viña del Mar., Chile |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
|
Pages |
|
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Programme |
119 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8730 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Lemonnier C., Schull Q., Stier A., Boonstra R., Delahanty B., Lefol E., Durand L., Pardonnet S., Robin Jp., Criscuolo F., Bize P., Viblanc Va |
|
| |
Title |
Adaptive phenotypic programming to social density in king penguins |
Type |
Peer-reviewed symposium |
| |
Year |
2023 |
Publication |
11th international penguin conference., 4-9 september 2023., viña del mar., chile |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
|
Pages |
|
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Programme |
119 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8731 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Lenourry L. |
|
| |
Title |
Adélie penguin (Pygoscelis adeliae) colony structuration in space and time: identifying selective pressures that shape colonial reproductive strategies |
Type |
Master 2 |
| |
Year |
2023 |
Publication |
Master 2 |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
|
Pages |
|
|
| |
Keywords |
|
|
| |
Abstract |
Cosupervision: Bonadonna & Le Bohec |
|
| |
Programme |
137 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8718 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Lissa Gourillon |
|
| |
Title |
Evolution des deltas et prodeltas du Lovenbreen depuis 2009 |
Type |
Master 1 |
| |
Year |
2023 |
Publication |
Etudiante d'intechmer- stage de 5 mois- encadrante : a. baltzer |
Abbreviated Journal |
|
|
| |
Volume |
|
Issue |
|
Pages |
65 p |
|
| |
Keywords |
|
|
| |
Abstract |
|
|
| |
Programme |
1223 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
|
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8750 |
|
| Permanent link to this record |
| |
|
| |
|
Author |
Lizhou Sha, Andrew M Vanderburg, Chelsea X Huang, David J Armstrong, Rafael Brahm, Steven Giacalone, Mackenna L Wood, Karen A Collins, Louise D Nielsen, Melissa J Hobson, Carl Ziegler, Steve B Howell, Pascal Torres-Miranda, Andrew W Mann, George Zhou, Elisa Delgado-Mena, Felipe I Rojas, Lyu Abe, Trifon Trifonov, Vardan Adibekyan, Sérgio G Sousa, Sergio B Fajardo-Acosta, Tristan Guillot, Saburo Howard, Colin Littlefield, Faith Hawthorn, François-Xavier Schmider, Jan Eberhardt, Thiam-Guan Tan, Ares Osborn, Richard P Schwarz, Paul Strøm, Andrés Jordán, Gavin Wang, Thomas Henning, Bob Massey, Nicholas Law, Chris Stockdale, Elise Furlan, Gregor Srdoc, Peter J Wheatley, David Barrado Navascués, Jack J Lissauer, Keivan G Stassun, George R Ricker, Roland K Vanderspek, David W Latham, Joshua N Winn, Sara Seager, Jon M Jenkins, Thomas Barclay, Luke G Bouma, Jessie L Christiansen, Natalia Guerrero, Mark E Rose |
|
| |
Title |
TESS spots a mini- interior to a hot saturn in the TOI-2000 system |
Type |
Journal |
| |
Year |
2023 |
Publication |
Monthly Notices of the Royal Astronomical Society |
Abbreviated Journal |
|
|
| |
Volume |
524 |
Issue |
1 |
Pages |
1113-1138 |
|
| |
Keywords |
|
|
| |
Abstract |
Hot jupiters (P < 10 d, M > 60 M⊕) are almost always found alone around their stars, but four out of hundreds known have inner companion planets. These rare companions allow us to constrain the hot jupiter’s formation history by ruling out high-eccentricity tidal migration. Less is known about inner companions to hot Saturn-mass planets. We report here the discovery of the TOI-2000 system, which features a hot Saturn-mass planet with a smaller inner companion. The mini-neptune TOI-2000 b (2.70 ± 0.15 R⊕, 11.0 ± 2.4 M⊕) is in a 3.10-d orbit, and the hot saturn TOI-2000 c ($8.14{-0.30}^{+0.31}$ R⊕ , $81.7{-4.6}^{+4.7}$ M⊕) is in a 9.13-d orbit. Both planets transit their host star TOI-2000 (TIC 371188886, V = 10.98, TESS magnitude = 10.36), a metal-rich ([Fe/H] = 0.439 $_{-0.043}^{+0.041}$) G dwarf 173 pc away. TESS observed the two planets in sectors 9–11 and 36–38, and we followed up with ground-based photometry, spectroscopy, and speckle imaging. Radial velocities from CHIRON, FEROS, and HARPS allowed us to confirm both planets by direct mass measurement. In addition, we demonstrate constraining planetary and stellar parameters with MIST stellar evolutionary tracks through Hamiltonian Monte Carlo under the PyMC framework, achieving higher sampling efficiency and shorter run time compared to traditional Markov chain Monte Carlo. Having the brightest host star in the V band among similar systems, TOI-2000 b and c are superb candidates for atmospheric characterization by the JWST, which can potentially distinguish whether they formed together or TOI-2000 c swept along material during migration to form TOI-2000 b. |
|
| |
Programme |
1066 |
|
| |
Campaign |
|
|
| |
Address |
|
|
| |
Corporate Author |
|
Thesis |
|
|
| |
Publisher |
|
Place of Publication |
|
Editor |
|
|
| |
Language |
|
Summary Language |
|
Original Title |
|
|
| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
| |
Series Volume |
|
Series Issue |
|
Edition |
|
|
| |
ISSN |
0035-8711 |
ISBN |
|
Medium |
|
|
| |
Area |
|
Expedition |
|
Conference |
|
|
| |
Notes |
|
Approved |
yes |
|
| |
Call Number |
|
Serial |
8641 |
|
| Permanent link to this record |
