Splinter session: Magnetic activity of young stars

F. Favata, Eric Feigelson

Research output: Contribution to journalConference article

Abstract

X-ray emission is by now a mature tool in the the context of the study of Young Stellar Objects (YSOs), their formation and their evolution. YSOs are copious X-ray sources, and circumstellar material is as transparent to X-rays as it is to IR radiation (the optical depth at 1 keV being the same as at 1 μm), so that X-rays allow to effectively detect embedded YSOs in star forming regions, and are routinely used to perform censuses of the population of star forming regions, embedded or not. In addition, X-ray emission is an effective tracer of the presence of magnetic fields (needed to confine the plasma), and therefore the study of X-ray activity allows to determine the characteristics of the magnetic field structures present in the immediate circumstellar region. Finally, X-rays have a significant influence on the circumstellar material, being an important source of ionizing radiation, and thus determining, among other things, the degree of coupling with the magnetic field, and are an important catalyst of chemical processes. The purpose of the splinter session on "Magnetic activity of young stars" was to both allow short presentations of a number of new results (many of them related to the COUP project, see below) and to stimulate discussion on a number of relevant issues. The present paper is a short summary of the presentations and of the discussion.

Original languageEnglish (US)
Pages (from-to)163-168
Number of pages6
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number560 I
StatePublished - Aug 29 2005
Event13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun - Hamburg, Germany
Duration: Jul 5 2004Jul 9 2004

Fingerprint

Stars
stars
X rays
x rays
Magnetic fields
magnetic field
magnetic fields
census
Ionizing radiation
young
chemical process
ionizing radiation
optical thickness
optical depth
tracers
catalyst
tracer
Infrared radiation
Plasmas
plasma

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

Cite this

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title = "Splinter session: Magnetic activity of young stars",
abstract = "X-ray emission is by now a mature tool in the the context of the study of Young Stellar Objects (YSOs), their formation and their evolution. YSOs are copious X-ray sources, and circumstellar material is as transparent to X-rays as it is to IR radiation (the optical depth at 1 keV being the same as at 1 μm), so that X-rays allow to effectively detect embedded YSOs in star forming regions, and are routinely used to perform censuses of the population of star forming regions, embedded or not. In addition, X-ray emission is an effective tracer of the presence of magnetic fields (needed to confine the plasma), and therefore the study of X-ray activity allows to determine the characteristics of the magnetic field structures present in the immediate circumstellar region. Finally, X-rays have a significant influence on the circumstellar material, being an important source of ionizing radiation, and thus determining, among other things, the degree of coupling with the magnetic field, and are an important catalyst of chemical processes. The purpose of the splinter session on {"}Magnetic activity of young stars{"} was to both allow short presentations of a number of new results (many of them related to the COUP project, see below) and to stimulate discussion on a number of relevant issues. The present paper is a short summary of the presentations and of the discussion.",
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language = "English (US)",
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journal = "European Space Agency, (Special Publication) ESA SP",
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Splinter session : Magnetic activity of young stars. / Favata, F.; Feigelson, Eric.

In: European Space Agency, (Special Publication) ESA SP, No. 560 I, 29.08.2005, p. 163-168.

Research output: Contribution to journalConference article

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T1 - Splinter session

T2 - Magnetic activity of young stars

AU - Favata, F.

AU - Feigelson, Eric

PY - 2005/8/29

Y1 - 2005/8/29

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AB - X-ray emission is by now a mature tool in the the context of the study of Young Stellar Objects (YSOs), their formation and their evolution. YSOs are copious X-ray sources, and circumstellar material is as transparent to X-rays as it is to IR radiation (the optical depth at 1 keV being the same as at 1 μm), so that X-rays allow to effectively detect embedded YSOs in star forming regions, and are routinely used to perform censuses of the population of star forming regions, embedded or not. In addition, X-ray emission is an effective tracer of the presence of magnetic fields (needed to confine the plasma), and therefore the study of X-ray activity allows to determine the characteristics of the magnetic field structures present in the immediate circumstellar region. Finally, X-rays have a significant influence on the circumstellar material, being an important source of ionizing radiation, and thus determining, among other things, the degree of coupling with the magnetic field, and are an important catalyst of chemical processes. The purpose of the splinter session on "Magnetic activity of young stars" was to both allow short presentations of a number of new results (many of them related to the COUP project, see below) and to stimulate discussion on a number of relevant issues. The present paper is a short summary of the presentations and of the discussion.

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