Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes
Ongoing studies of different groups of stars result in improving our knowledge of their fundamental parameters and evolutionary status. Also, they result in finding new phases of stellar evolution, which require theoretical explanation. At the same time, availability of large telescopes and sensitiv...
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doaj-6401dbaf01b744a58811d3e0b3b8f6632021-09-06T19:40:10ZengDe GruyterOpen Astronomy2543-63762017-11-01261939810.1515/astro-2017-0027astro-2017-0027Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar EnvelopesMiroshnichenko Anatoly S.0Danford Steven1Zharikov Sergei V.2Manset Nadine3Levato Hugo4Grosso Monica5Korčáková Daniela6Kusakin Anatoly V.7Khokhlov Serik A.8Prendergast Peter9Department of Physics and Astronomy, University of North Carolina at Greensboro, Greensboro, NC 27402–6170, United States of AmericaDepartment of Physics and Astronomy, University of North Carolina at Greensboro, Greensboro, NC 27402–6170, United States of AmericaInstituto de Astronomia, Universidad Nacional Autónoma de México, Apdo. Postal 877, Ensenada, 22800, Baja California, MexicoCFHT Corporation, 65-1238 Mamalahoa Hwy, Kamuela, HI 96743, United States of AmericaInstituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE), CONICET, Casilla de Correo 49, CP 5400, San Juan, ArgentinaInstituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE), CONICET, Casilla de Correo 49, CP 5400, San Juan, ArgentinaAstronomical Institute, Charles University in Prague, Faculty of Mathematics and Physics, CZ–180 00, Praha 8, V Holešovičkách 2, Prague, Czech RepublicFesenkov Astrophysical Institute, Observatory, 23, Almaty, 050020, KazakhstanFesenkov Astrophysical Institute, Observatory, 23, Almaty, 050020, Kazakhstan; NNLOT Al-Farabi Kazakh National University, Al-Farabi Ave., 71, 050038, Almaty, KazakhstanKernersville Observatory, NC, Kernersville, United States of AmericaOngoing studies of different groups of stars result in improving our knowledge of their fundamental parameters and evolutionary status. Also, they result in finding new phases of stellar evolution, which require theoretical explanation. At the same time, availability of large telescopes and sensitivity improvement of detectors shift the focus of many observational programs toward fainter and more distant objects. However, there are still many problems in our understanding of details of stellar evolution which can now be solved with small telescopes and observations of bright stars. Approaching these problems implies conducting surveys of large groups of stars and long-term monitoring of individual objects. In this talk, we present the results of recent international programs of photometric and spectral monitoring of several groups of early-type stars. In particular, we discuss the role of binarity in creation of the Be phenomenon and show examples of recently discovered binary systems as well as the problem of refining fundamental parameters of B and A type supergiants. Special attention will be paid to collaboration with the amateur community and use of échelle spectrographs mounted on small telescopes.https://doi.org/10.1515/astro-2017-0027early-type starsspectroscopymonitoringemission-line starssupergiants |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Miroshnichenko Anatoly S. Danford Steven Zharikov Sergei V. Manset Nadine Levato Hugo Grosso Monica Korčáková Daniela Kusakin Anatoly V. Khokhlov Serik A. Prendergast Peter |
spellingShingle |
Miroshnichenko Anatoly S. Danford Steven Zharikov Sergei V. Manset Nadine Levato Hugo Grosso Monica Korčáková Daniela Kusakin Anatoly V. Khokhlov Serik A. Prendergast Peter Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes Open Astronomy early-type stars spectroscopy monitoring emission-line stars supergiants |
author_facet |
Miroshnichenko Anatoly S. Danford Steven Zharikov Sergei V. Manset Nadine Levato Hugo Grosso Monica Korčáková Daniela Kusakin Anatoly V. Khokhlov Serik A. Prendergast Peter |
author_sort |
Miroshnichenko Anatoly S. |
title |
Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes |
title_short |
Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes |
title_full |
Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes |
title_fullStr |
Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes |
title_full_unstemmed |
Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes |
title_sort |
long-term spectroscopic monitoring and surveys of early-type stars with and without circumstellar envelopes |
publisher |
De Gruyter |
series |
Open Astronomy |
issn |
2543-6376 |
publishDate |
2017-11-01 |
description |
Ongoing studies of different groups of stars result in improving our knowledge of their fundamental parameters and evolutionary status. Also, they result in finding new phases of stellar evolution, which require theoretical explanation. At the same time, availability of large telescopes and sensitivity improvement of detectors shift the focus of many observational programs toward fainter and more distant objects. However, there are still many problems in our understanding of details of stellar evolution which can now be solved with small telescopes and observations of bright stars. Approaching these problems implies conducting surveys of large groups of stars and long-term monitoring of individual objects. In this talk, we present the results of recent international programs of photometric and spectral monitoring of several groups of early-type stars. In particular, we discuss the role of binarity in creation of the Be phenomenon and show examples of recently discovered binary systems as well as the problem of refining fundamental parameters of B and A type supergiants. Special attention will be paid to collaboration with the amateur community and use of échelle spectrographs mounted on small telescopes. |
topic |
early-type stars spectroscopy monitoring emission-line stars supergiants |
url |
https://doi.org/10.1515/astro-2017-0027 |
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