Sunspots and Starspots

Written from both an observational and historical perspective, this book is the first to provide a comprehensive combined account of sunspots and starspots.

Author: John H. Thomas

Publisher: Cambridge University Press

ISBN: 9781107410558

Category: Science

Page: 292

View: 608

Written from both an observational and historical perspective, this book is the first to provide a comprehensive combined account of sunspots and starspots. It begins with a substantial historical introduction, then explores the intricate structure of a sunspot's magnetic field and the prevalence of polar spots on stars. Additional topics covered in depth include solar and stellar magnetic activity, dynamo models of magnetic cycles, and the influence of solar variability on the Earth's magnetosphere and climate. It is a valuable reference for graduate students and specialists in solar and stellar physics, astronomers, geophysicists, space physicists and experts in fluid dynamics and plasma physics.

Special Report

The ultraviolet spectra of 1 And show attributes of both starspots and active
regions . In the Sun , emissions for ions formed in the temperature range 105 < T :
< 106 are brighter over sunspot umbrae than in surrounding plages ( Foukal et al
.

Author: Smithsonian Astrophysical Observatory

Publisher:

ISBN:

Category: Artificial satellites

Page:

View: 994


New Scientist

It is not altogether clear whether these huge cool patches are similar to sunspots.
Even the largest sunspot groups occupy less than one-thousandth of the Sun's
surface, so the starspots are hundreds of times larger. In theory, the subgiant ...

Author:

Publisher:

ISBN:

Category:

Page: 92

View: 608

New Scientist magazine was launched in 1956 "for all those men and women who are interested in scientific discovery, and in its industrial, commercial and social consequences". The brand's mission is no different today - for its consumers, New Scientist reports, explores and interprets the results of human endeavour set in the context of society and culture.

NASA Thesaurus

Sunspots starspots sunspots stellar flares . . solar flares RT flare stars oo flares
magnetic disturbances magnetohydrodynamics photosphere starquakes stars
stellar convection stellar Interiors stellar luminosity stellar magnetic fields stellar ...

Author:

Publisher:

ISBN:

Category: Subject headings

Page:

View: 725


Research in Space Science SAO Special Report

The ultraviolet spectra of 1 And show attributes of both starspots and active
regions . In the Sun , emissions for ions formed in the temperature range 105 T : <
106 are brighter over sunspot umbrae than in surrounding plages ( Foukal et al .

Author: Smithsonian Astrophysical Observatory

Publisher:

ISBN:

Category: Artificial satellites

Page:

View: 574


SAO Special Report

The ultraviolet spectra of A And show attributes of both starspots and active
regions. In the Sun, emissions for ions formed in the temperature range 10° & T &
106 are brighter over sunspot umbrae than in surrounding plages (Foukal et al.

Author:

Publisher:

ISBN:

Category: Artificial satellites

Page:

View: 612


Magill s Survey of Science

Violent starspots of great intensity and related magnetic fields were detected on
several such stars , except that the spots were one hundred times larger than
sunspots , covering up to one - fifth of the star ' s surface ( in contrast to 0 . 1
percent ...

Author: Frank Northen Magill

Publisher:

ISBN: 9780893566050

Category: Astronautics

Page: 2328

View: 350


The Science Almanac

Author: Bryan H. Bunch

Publisher: Anchor Books

ISBN: 9780385193214

Category: Science

Page: 562

View: 137

This first volume of a yearbook reports a number of events and developments in scientific fields in the period covering 1980 to mid-1984. The areas covered are archaeology, anthropology, astronomy, biology, chemistry, earth science, environment, mathematics, medicine, and physics. ISBN 0-385-19320-3 (pbk) : $12.95. (For use only in the library).

Indian Journal of Radio Space Physics

The original motivation for studying magneto - convection arose from the attempts
to explain the origin of sunspots and starspots . Sunspots and star spots are dark
, because thermal convection is suppressed by a strong magnetic field ...

Author:

Publisher:

ISBN:

Category: Cosmic physics

Page:

View: 557


Transactions of the International Astronomical Union

Peak Sunspot Workshop " ) , Foukal and Vernazza ( 26 080 037 ) , and Hartmann
and Rosner ( 25 064 077 ) discuss some of the physical implications of energy
storage in the convection zone , associated with sunspots or starspots .

Author: International Astronomical Union

Publisher:

ISBN:

Category: Astronomy

Page:

View: 398


Reprints

Peak Sunspot Workshop " ) , Foukal and Vernazza ( 26 080 037 ) , and Hartmann
and Rosner ( 25 064 077 ) discuss some of the physical implications of energy
storage in the convection zone , associated with sunspots or starspots .

Author:

Publisher:

ISBN:

Category: Astronomy

Page:

View: 438


Proceedings of Kunming Workshop on Solar Physics and Interplanetary Travelling Phenomena

... field strength whose magnetic pressure is balanced with outside pressure , and
thus above which no further cooling can stabilize the tube , gives us an
interesting index for magnetic field strengths of sunspots and starspots for various
stars .

Author:

Publisher:

ISBN:

Category: Solar activity

Page: 1296

View: 319


The Physics of Sunspots

The result of Eaton and Hall ( 1979 ) for the starspot SZ Psc , and average values
for sun spots have been included for comparison . Typically 97 % of the flux from
a sun spot originates in the penumbra , and thus if star spots are similar to ...

Author: Lawrence E. Cram

Publisher:

ISBN:

Category: Sunspots

Page: 495

View: 783


The A Star Puzzle IAU S224

Two topics concerning A - type stars are discussed : starspots associated with the
strong magnetic fields and the prospects for asteroseismology . Considering
starspots as analogous to sunspots is misleading . The photosphere of starspots
of ...

Author: International Astronomical Union. Symposium

Publisher: Cambridge University Press

ISBN: 9780521850186

Category: Science

Page: 520

View: 749

Explores some of the less well understood physical processes involved in the modeling of stars.

Physics of Sun and Star Spots IAU S273

This volume contains reviews and research articles from solar and stellar astronomers on the recent findings of solar and stellar magnetism using observational, theoretical and simulation studies of the Sun and the stars to approach the ...

Author: Debi Prasad Choudhary

Publisher: Cambridge University Press

ISBN: 9780521760621

Category: Science

Page: 526

View: 109

Celebrating the centenary of George Ellery Hale's discovery of magnetic fields in sunspots, IAU Symposium 273 reviews the recent advances made in the fields of solar and stellar magnetism. Sunspots are responsible for the time-varying properties of the Sun, including the solar irradiance. Combined study of the spots on the Sun and on other stars provides a greater understanding of sunspot formation and behaviour on a long-term basis. On the other hand, stellar observations can be best understood by using detailed properties of the Sun as a reference point. This volume contains reviews and research articles from solar and stellar astronomers on the recent findings of solar and stellar magnetism using observational, theoretical and simulation studies of the Sun and the stars to approach the subject in a unified manner. Its findings are useful to advanced students and researchers in solar and stellar astronomy.

NASA Thesaurus Astronomy Vocabulary

Author:

Publisher:

ISBN:

Category:

Page: 112

View: 147


Journal of the Italian Astronomical Society

Few stars have been well studied , but even so , it seems clear that starspots
show temperature differences , spectral - type differences , and structure
arrangements consistent with scaled - up versions of sunspots . The high
latitudes deduced ...

Author: Società astronomica italiana

Publisher:

ISBN:

Category: Astronomy

Page:

View: 775


Foundations of Astronomy

The center of a large sunspot is about 4240 K . The temperature of the
photosphere is about 5800 K , so the cooler spot looks dark in contrast . In fact , a
... Do other stars have sunspots , or rather starspots , on their surfaces ? This
question is ...

Author: Michael A. Seeds

Publisher: Wadsworth Publishing Company

ISBN:

Category: Astronomy

Page: 608

View: 693


Encyclopedia of Physical Science and Technology

Author:

Publisher:

ISBN:

Category: Physical sciences

Page:

View: 197


The Irish Astronomical Journal

For example the solar magnetic flux distribution can give rise to sun - spots which
cover up to 0 . 2 % of the Sun ' s surface but some active stars ( e . g . dMe stars )
can have starspot coverages of 10 - 50 % . In such stars also the energy ...

Author:

Publisher:

ISBN:

Category: Astronomy

Page:

View: 904