Bulletin de la Societe Royale des Sciences de Liege最新文献_第2页

Le séisme de Mila du 07/08/2020 (Nord-Est algérien) : essai d’interprétation de l’activité sismique et des effets induits au niveau de la colline d’El Kherba 2020年7月8日Mila地震(阿尔及利亚东北部):试图解释el Kherba山的地震活动和诱导效应

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11368

Ahmed Bougherara, Ramdane Marmi, Moussa Boulaarak, Kamel Boufaa

{"title":"Le séisme de Mila du 07/08/2020 (Nord-Est algérien) : essai d’interprétation de l’activité sismique et des effets induits au niveau de la colline d’El Kherba","authors":"Ahmed Bougherara, Ramdane Marmi, Moussa Boulaarak, Kamel Boufaa","doi":"10.25518/0037-9565.11368","DOIUrl":"https://doi.org/10.25518/0037-9565.11368","url":null,"abstract":"La vulnérabilité du site de la ville de Mila aux mouvements de masse est une contrainte majeure devant son développement urbain. Son héritage morphologique explique largement sa dynamique actuelle. Les grandes coulées quaternaires, issues du démantèlement du flanc nord de Marechau, ont dévié l’oued Mila vers l’ouest pour s’enfoncer sous forme d’arc de cercle et dégager la colline d’El Kherba. La massivité de cette dernière a permis l’installation d’une série de ravins (paléo-vallons) parallèles, inégalement creusés. Faute de soutirage efficace, ces derniers ont été comblés. La surface de contact entre la roche en place et le matériau de comblement est restée une semelle de glissement potentielle. Aussi, la fréquence et l’intensité des séismes (probablement en partie induits) sont loin d’être négligeables. En effet, après l’envahissement du site par une urbanisation rapide et massive, les effets induits des derniers séismes ont été probablement amplifiés d’où les dégâts observés.","PeriodicalId":35838,"journal":{"name":"Bulletin de la Societe Royale des Sciences de Liege","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135053158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The origin of subdwarf B stars 亚矮星B星的起源

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11190

Callum AUBREY, Ralf NAPIWOTZKI

引用次数: 2

The close binary fraction of He-rich hot subdwarfs from SALT and TESS 来自SALT和TESS的富氦热亚矮星的紧密二元分数

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11278

E. J. SNOWDON, C. S. JEFFERY, S. SCHLAGENHAUF

引用次数: 0

10th Meeting on Hot Subdwarfs and Related Objects (tagged as "sdOB10") held at University of Liège, Belgium, in June 13-17, 2022 第10届热亚矮星及相关天体会议(标记为“sdOB10”)于2022年6月13日至17日在比利时li<e:1>大学举行

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11186

Valerie VAN GROOTEL, Ingrid Pelisoli

{"title":"10th Meeting on Hot Subdwarfs and Related Objects (tagged as \"sdOB10\") held at University of Liège, Belgium, in June 13-17, 2022","authors":"Valerie VAN GROOTEL, Ingrid Pelisoli","doi":"10.25518/0037-9565.11186","DOIUrl":"https://doi.org/10.25518/0037-9565.11186","url":null,"abstract":"Foreword The 10th Meeting on Hot Subdwarfs and Related Objects (tagged as \"sdOB10\") was held at University of Liège, Belgium, in June 13-17, 2022 (www.sdOB10.uliege.be). The meeting gathered 75 participants from all around the world, with 60 people on site and 15 participants online, via the live retransmission. This gathering celebrated the 10th edition of this series of meetings initiated in 2003 in Keele (UK) and devoted to hot subdwarf stars. These little blue objects represent an advanced stage of stellar evolution, at least after the first red giant branch (the details of their formation from single, binary and merger channels are still discussed nowa-days), and have attracted a vibrant community of researchers in the last decades for addressing the series of challenges these stars represent. These challenges were reflected in the six sessions organised at the sdOB10 meeting: (1) Atmospheric studies of hot subdwarfs; (2) Populations of hot subdwarfs (both from large surveys and synthesis studies); (3) Pulsations in hot subdwarfs; (4) Hot subdwarfs as laboratories for stellar physics; (5) Origin and evolution of hot subdwarfs; and (6) Massive, compact, low-mass and substellar companions to hot subdwarfs. 58 talks were presented during these six sessions, including 14 flash-talks of 5 minutes showcasing 14 posters that were uploaded on the conference repository. In addition, 3 general discussions were organised along the meeting, fostering collaborations and opening paths","PeriodicalId":35838,"journal":{"name":"Bulletin de la Societe Royale des Sciences de Liege","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135053154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A grid of Non-LTE line-blanketed atmosphere structures and synthetic spectra for subdwarfs 非lte线覆盖大气结构的网格和亚矮星的合成光谱

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11238

Thayse A. PACHECO, Ronaldo S. LEVENHAGEN, Marcos P. DIAZ, Paula R. T. COELHO

引用次数: 0

Detailed follow up studies of three ultracompact sdB binaries 三个超压缩sdB双星的详细随访研究

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11283

Eric STRINGER, Thomas KUPFER, Matti DORSCH

引用次数: 0

The search for transiting planets around hot subdwarfs 在热亚矮星周围寻找凌日行星

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11251

Francisco J. POZUELOS, Valerie VAN GROOTEL, Antoine THUILLIER, Martín DÉVORA-PAJARES

{"title":"The search for transiting planets around hot subdwarfs","authors":"Francisco J. POZUELOS, Valerie VAN GROOTEL, Antoine THUILLIER, Martín DÉVORA-PAJARES","doi":"10.25518/0037-9565.11251","DOIUrl":"https://doi.org/10.25518/0037-9565.11251","url":null,"abstract":"The main goal of this project is to investigate star-planet interactions during the Red Giant Branch (RGB) phase. In particular, we focus on what happens to planetary systems once their host stars leave the main sequence and engulf close-in planets, presumably, perturbing the dy-namical architecture of the system. In this context, we wonder if close-in planets may survive this evolutionary phase, evolving towards a new stable configuration, or on the contrary, if these planets are destroyed and the entire system collapses. Whatever the outcome, how will this interaction alter the star and affect its subsequent evolution? Here, we search for observational evidence of transiting planets orbiting hot subdwarfs (sdBs) stars, which are direct post-RGB objects that have lost most of their envelopes. To this end, we analyze light curves from the space missions Kepler/K2, TESS, and CHEOPS to search for shallow periodic transits of close-in, previously engulfed planets or their remnants, such as the rocky cores of giant gas planets. By determining the occurrence of planets or remnants around sdB stars, we will place strong constraints on the evolution of planetary systems after the RGB phase of their host stars. This summary describes the methods, tools, and strategies used to explore the available photometric data in the search for transiting planets and establish detection limits that allow us to build planet occurrence rates around these stars.","PeriodicalId":35838,"journal":{"name":"Bulletin de la Societe Royale des Sciences de Liege","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135052658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Asteroseismology of hot subdwarf B stars observed with TESS: discovery of two new gravity mode pulsating stars 用TESS观测热亚矮星B的星震学:发现两颗新的重力模式脉动恒星

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11294

Murat UZUNDAG, Roberto SILVOTTI, Andrzej S. BARAN, Maja VUčKOVIć, Péter NÉMETH, Sumanta K. SAHOO, Mike REED

{"title":"Asteroseismology of hot subdwarf B stars observed with TESS: discovery of two new gravity mode pulsating stars","authors":"Murat UZUNDAG, Roberto SILVOTTI, Andrzej S. BARAN, Maja VUčKOVIć, Péter NÉMETH, Sumanta K. SAHOO, Mike REED","doi":"10.25518/0037-9565.11294","DOIUrl":"https://doi.org/10.25518/0037-9565.11294","url":null,"abstract":"TIC 033834484 and TIC 309658435 are long-period pulsating subdwarf B stars, which were observed extensively (675 and 621 days, respectively) by the Transiting Exoplanet Sur-vey Satellite (TESS). The high-precision photometric light curve reveals the presence of more than 40 pulsation modes including both stars. All the oscillation frequencies that we found are associated with gravity (g)-mode pulsations, with frequencies spanning from ∼80 µHz (2 500 s) to ∼400 µHz (12 000 s). We utilize the asteroseismic tools including asymptotic period spacings and rotational frequency multiplets in order to identify the pulsational modes. We found dipole (l = 1) mode sequences for both targets and calculate the mean period spacing of dipole modes (ΔPl=1), which allows us to identify the modes. Frequency multiplets provide a rotation period of ∼64 d for TIC 033834484. From follow-up ground-based spectroscopy, we find that TIC 033834484 has an effective temperature of 24 210 K (140), a surface gravity of log g/cms-2 = 5.28 (03) and TIC 309658435 has an effective temperature of 25 910 K (150), a surface gravity of log g/cms-2 = 5.48 (03).","PeriodicalId":35838,"journal":{"name":"Bulletin de la Societe Royale des Sciences de Liege","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135053204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Minéralogie de la Formation d'Ottré au Thier del Preu et au Thier du Mont à Grand-Sart (Lierneux, Belgique), et comparaison avec les autres gisements régionaux Grand-Sart(比利时Lierneux) Thier del Preu和Thier du Mont ottre组的矿物学及与其他区域矿床的比较

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11449

Michel Blondieau, Stéphane Puccio, Frédéric Hatert, Martin Depret, Fabrice Dal Bo

引用次数: 0

Diversity of hard tick (Acari: Ixodidae) infesting small ruminants in some breeding farms in Tizi-Ouzou area (Northern Algeria) 阿尔及利亚北部Tizi-Ouzou地区一些养殖场侵害小反刍动物的硬蜱(蜱螨:伊蚊科)多样性

Bulletin de la Societe Royale des Sciences de Liege Pub Date : 2023-01-01 DOI: 10.25518/0037-9565.11396

Thinhinane Djouaher, Soumeya Chahed, Assia Beneldjouzi, Naouel Eddaikra, Karima Brahmi

{"title":"Diversity of hard tick (Acari: Ixodidae) infesting small ruminants in some breeding farms in Tizi-Ouzou area (Northern Algeria)","authors":"Thinhinane Djouaher, Soumeya Chahed, Assia Beneldjouzi, Naouel Eddaikra, Karima Brahmi","doi":"10.25518/0037-9565.11396","DOIUrl":"https://doi.org/10.25518/0037-9565.11396","url":null,"abstract":"Ticks are hematophagous arthropods and obligate ectoparasites with a cosmopolitan distribution. They are of great medical and veterinary importance. Studying the composition of the tick fauna is a crucial step in establishing vector control programs. In this context, an inventory of hard ticks infesting small ruminants in the Tizi-Ouzou area was carried out over a one-year period, from December 2020 to November 2021. Using the direct collection technique on the host animal, a total of 663 animals examined, 170 were infested and a total of 1318 adult tick’s specimens were collected in four sampling sites. The result shows a tick diversity comprising six different species. The most abundant species was Rhipicephalus bursa (68.66%), followed by Rhipicephalus sanguineus (29.74%) and Ixodes ricinus (1.36%). Other species were less abundant, each representing only 0,08% of the total abundance. The highest specific richness was recorded in the Ain El Hammam site located at high altitude. A positive correlation was observed between the farms’ altitude and the tick diversity. The result of FCA analysis showed that distribution of ticks is related to altitude and habitat of tick’s species.","PeriodicalId":35838,"journal":{"name":"Bulletin de la Societe Royale des Sciences de Liege","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135106579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0