发布求助
文献互助 智能选刊 最新文献

Highlights of Astronomy最新文献

筛选
英文 中文
Search for Signs of a New Outburst in the Quiescent State of CH Cygni 在天鹅座天鹅座的静止状态中寻找新的爆发迹象
Highlights of Astronomy Pub Date : 1999-09-01 DOI: 10.1017/S1539299600021080
D. Kotnik-Karuza, R. Jurdana-Šepić
{"title":"Search for Signs of a New Outburst in the Quiescent State of CH Cygni","authors":"D. Kotnik-Karuza, R. Jurdana-Šepić","doi":"10.1017/S1539299600021080","DOIUrl":"https://doi.org/10.1017/S1539299600021080","url":null,"abstract":"Our high-resolution optical spectroscopic survey of the symbiotic star CH Cyg, extending over the quiescent period 1987 - 1989 between two outbursts, shows that the spectrum did not completely lose its symbiotic character. Moreover, signs of radiation of the hot source were present, not only as remnants from the previous outburst, but also as an indication of a new one. Some of the evidences which support this idea are following: • Variation of excitation and vibration temperatures of neutral metals and TiO moleculs respectively • Untypical microturbulent velocity dependance of the excitation potential of the lower state for Fe I • Double-peaked Balmer profiles of Ha and Hb with temporary disappearance of the central absorption • Presence of forbbiden emission lines [FeII] [ SII] [NeIII] together with OIII with complex profile and variable intensity.","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127954073","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
Deep Surveys and Cosmology 深度调查和宇宙学
Highlights of Astronomy Pub Date : 1999-01-20 DOI: 10.1017/S1539299600019730
S. Oliver
{"title":"Deep Surveys and Cosmology","authors":"S. Oliver","doi":"10.1017/S1539299600019730","DOIUrl":"https://doi.org/10.1017/S1539299600019730","url":null,"abstract":"Surveys with ISO (Kessler et al 1996), in particular with the CAM (Cesarsky et al 1996) and PHOT (Lemke et al 1996) instruments, will greatly extend our understanding of extra-galactic populations and their cosmological evolution. The main advantages that ISO surveys have over e.g IRAS are increased sensitivity/depth and wavelength coverage. Within the Guaranteed and Open Time programmes there are many field surveys which will efficiently map the limits in these parameters. In this talk I will briefly overview those surveys before concentrating in more detail on one survey in particular, the ISO survey of the Hubble Deep Field (HDF), to illustrate the kind of results that can be expected.","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122162965","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
Infrared Observations of Galaxy Clusters 星系团的红外观测
Highlights of Astronomy Pub Date : 1997-11-28 DOI: 10.1017/S1539299600019754
D. Elbaz
{"title":"Infrared Observations of Galaxy Clusters","authors":"D. Elbaz","doi":"10.1017/S1539299600019754","DOIUrl":"https://doi.org/10.1017/S1539299600019754","url":null,"abstract":"The evolution of galaxy clusters from their formation due to the merging of sub structures, the bulk of star formation and subsequent chemical enrichment of the intra-cluster medium, is expected to be quite recent (z<1-2) in the hierarchical clustering scenario (White & Prenk 1991).","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"2009 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127333918","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
Population Synthesis of High Energy Transients: Relativistic Binary Merging Rates 高能瞬态的居群合成:相对论二元合并率
Highlights of Astronomy Pub Date : 1997-11-20 DOI: 10.1017/S1539299600018761
V. Lipunov
{"title":"Population Synthesis of High Energy Transients: Relativistic Binary Merging Rates","authors":"V. Lipunov","doi":"10.1017/S1539299600018761","DOIUrl":"https://doi.org/10.1017/S1539299600018761","url":null,"abstract":"The simulated rates of NS+NS, NS+BH and BH+BH mergings are considered in relation with the problem of GRBursts origin and gravitational waves detection.","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125432492","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
Dynamical Simulations: Methods and Comparisons 动态模拟:方法和比较
Highlights of Astronomy Pub Date : 1997-11-17 DOI: 10.1007/978-94-011-4778-1_1
D. Heggie, M. Giersz, R. Spurzem, K. Takahashi
{"title":"Dynamical Simulations: Methods and Comparisons","authors":"D. Heggie, M. Giersz, R. Spurzem, K. Takahashi","doi":"10.1007/978-94-011-4778-1_1","DOIUrl":"https://doi.org/10.1007/978-94-011-4778-1_1","url":null,"abstract":"","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"72 1-3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120918010","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: 16
Abundance Ratios in Composite Stellar Populations with Special Emphasis on Elliptical Galaxies 复合恒星群的丰度比，特别强调椭圆星系
Highlights of Astronomy Pub Date : 1997-11-10 DOI: 10.1017/S1539299600020025
U. F. Alvensleben
{"title":"Abundance Ratios in Composite Stellar Populations with Special Emphasis on Elliptical Galaxies","authors":"U. F. Alvensleben","doi":"10.1017/S1539299600020025","DOIUrl":"https://doi.org/10.1017/S1539299600020025","url":null,"abstract":"Abundance Ratios are observed in a wide variety of instances addressed in this volume: in Gas and Stars, Simple Stellar Populations (SSPs) like star clusters, and, finally, in Composite Stellar Populations (CSPs) like E/SO galaxies (Bulges, spheroidal galaxies, Merger Remnants, etc.) on which the focus of this contribution will be. I’ll briefly review the observational situation and the current interpretation and then cast some doubt on the latter from our own chemically consistent spectrophotometric modelling results.","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129966628","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
Redshift Surveys With 2DF 用2DF观测红移
Highlights of Astronomy Pub Date : 1997-10-24 DOI: 10.1017/S153929960002181X
M. Colless, B. Boyle
{"title":"Redshift Surveys With 2DF","authors":"M. Colless, B. Boyle","doi":"10.1017/S153929960002181X","DOIUrl":"https://doi.org/10.1017/S153929960002181X","url":null,"abstract":"This IAU Joint Discussion proposes to address the subject of redshift surveys in the 21st century. This paper, however, deals with two major new redshift surveys that those involved sincerely hope will be completed in the 20th century. Nonetheless, these surveys are relevant to the topic of the meeting, as they clearly foreshadow the scope and style of redshift surveys, if not in the coming millennium, at least in the coming decade. The surveys are being carried out with the new Two Degree Field (2dF) facility on the Anglo-Australian Telescope (AAT), a 400-fibre multi-object spectrograph with the capability, as described in Section 2, to increase the size of redshift surveys by an order of magnitude over current best efforts. The main scientific goals, survey strategy and some preliminary results from the 2dF Galaxy Redshift Survey are outlined in Section 3, while Section 4 similarly describes the 2dF QSO Redshift Survey. Further information can be found on the WWW at http://www.aao.gov.au/2df/ for the 2dF facility, at http://msowww.anu.edu.au/~colless/2dF/ for thegalaxy survey and at http://www.aao.gov.au/local/www/rs/qso_surv.html for the QSO survey.","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131803225","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
Stellar Evolution and Dynamics in Star Clusters 星团中的恒星演化和动力学
Highlights of Astronomy Pub Date : 1997-10-20 DOI: 10.1007/978-94-011-4778-1_7
S. Zwart, C. Tout, Hyung-Mok Lee
{"title":"Stellar Evolution and Dynamics in Star Clusters","authors":"S. Zwart, C. Tout, Hyung-Mok Lee","doi":"10.1007/978-94-011-4778-1_7","DOIUrl":"https://doi.org/10.1007/978-94-011-4778-1_7","url":null,"abstract":"","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121934881","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
Formation of Low-Mass Black Hole X-Ray Transients 低质量黑洞x射线瞬变的形成
Highlights of Astronomy Pub Date : 1997-10-02 DOI: 10.1017/S153929960001875X
S. Zwart, Frank Verbunt Ene Ergma
{"title":"Formation of Low-Mass Black Hole X-Ray Transients","authors":"S. Zwart, Frank Verbunt Ene Ergma","doi":"10.1017/S153929960001875X","DOIUrl":"https://doi.org/10.1017/S153929960001875X","url":null,"abstract":"We study the formation of low-mass X-ray binaries with a black hole as accreting object. The performed semi-analytic analysis reveals that the formation rate of black holes in low-mass X-ray binaries is about two orders of magnitude smaller than that of systems with a neutron star as accretor. This is contradicted by the six observed systems, which are all transients, which suggest that the majority of these systems has not been seen jet. The birthrate for both type of objects are expected to be similar (for reviews see Cowley 1992, Tanaka & Lewin 1995).","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124914482","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
Tidal Dwarf Galaxies 潮汐矮星系
Highlights of Astronomy Pub Date : 1997-09-01 DOI: 10.1017/S153929960002027X
P. Duc, F. Mirabel
{"title":"Tidal Dwarf Galaxies","authors":"P. Duc, F. Mirabel","doi":"10.1017/S153929960002027X","DOIUrl":"https://doi.org/10.1017/S153929960002027X","url":null,"abstract":"We review the observational evidences for tidal dwarf galaxies, a class of small galaxies formed out of the tidal debris of collisions between massive galaxies. Tidal dwarfs are found far from the interacting parent galaxies, associated with massive clouds of atomic hydrogen located at the tip of long tidal tails. These newly formed galaxies are among the best cases for the study of galaxy formation in the nearby Universe.","PeriodicalId":422890,"journal":{"name":"Highlights of Astronomy","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133477592","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: 13
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信