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Topic: List of semiregular variable stars

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	Variable star - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-08-19)
		For regular variables, the period of variation and its amplitude can be very well established; for many variable stars, though, these quantities may vary slowly over time, or even from one period to the next.
		This variation is thought to be caused by episodes of dust formation in the atmosphere of the star.
		Stars with sizable sunspots may show significant variations in brightness as they rotate, and brighter areas of the surface are brought into view.
	www.secaucus.us /project/wikipedia/index.php/Variable_star (1148 words)

	Semiregular variable star - Wikipedia, the free encyclopedia
		Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities.
		Every star of this type may usually be assigned a certain mean period.
		Amplitudes of light variation are in the range from 0.1 to 4 mag, and the range of periods is from 30 to 1100 days.
	en.wikipedia.org /wiki/Semiregular_variable (345 words)

	List of reference tables - Open Encyclopedia (Site not responding. Last check: 2007-08-19)
		This is a list of reference tables, similar to the collection of reference tables found at the back of almanacs, dictionaries and encyclopedias (or an index of them, if they're scattered throughout the work).
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	CONK! Encyclopedia: List_of_science_topics (Site not responding. Last check: 2007-08-19)
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	betelgeuse
		It is the 12th brightest star in the sky, a red supergiant, and is a vertex of the Winter Triangle.
		Because it is the first star of Orion to rise, the title of "roarer" or "announcer" has been assigned to it by ancient writers.
		Some regard the star's current variability as suggesting that it is already in the carbon burning phase of its life cycle, and will therefore go supernova at some time in the next thousand years or so.
	www.fact-library.com /betelgeuse.html (333 words)

	Learn more about List of reference tables in the online encyclopedia. (Site not responding. Last check: 2007-08-19)
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	www.onlineencyclopedia.org /l/li/list_of_reference_tables.html (1071 words)

	Semiregular variable star -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-08-19)
		The amplitudes may be from several hundredths to several (The property of relative size or extent) magnitudes (usually 1-2 magnitudes in the V filter).
		Semiregular (A quantity that can assume any of a set of values) variables are classified in several subtypes:
		SRA: Late spectral-type (M, C, S or Me, Ce, Se) giants displaying persistent periodicity and usually small amplitude, less than 2.5 (The property of relative size or extent) magnitudes in V. Z Aquarii is an example of this class.
	www.absoluteastronomy.com /encyclopedia/S/Se/Semiregular_variable_star.htm (386 words)

	AAVSO: Variable Star of the Month, R Leo
		With a change in brightness of several magnitudes and an average periodicity of 312 days, this star is categorized as belonging to the Mira-type class of long period variable stars.
		Mira.) Such variables are found in the high luminosity portion of the asymptotic giant branch (AGB) in the H-R diagram, along with the semiregular variable stars.
		Mira stars tend to be of spectral type M, S, and C, and with lengthy periods of 80 to 1000 days, these stars (along with their semiregular relatives) are refered to as long period variables.
	www.aavso.org /vstar/vsots/0401.shtml (2548 words)

	Semiregular variable (Site not responding. Last check: 2007-08-19)
		Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interruptedby various irregularities.
		Many of these stars differ from Miravariables only by showing smaller light amplitudes.
		Every star of this type may usually be assigned a certainmean period.
	www.therfcc.org /semiregular-variable-34796.html (314 words)

	Multiwavelength Study of Mira Ceti-Type Variable Stars
		The AGB red giants are subject to pulsational instability; most of them are variable stars, belonging to the Mira Ceti type or to the semiregulars, with timescales of brightness variations of a few hundreds of days.
		We are interested with the effects, connected with AGB stars' variability; in particular, with the phenomena due to passage of shock waves in the atmospheres and envelopes of the stars (shock waves are formed during each cycles of stars' light variations).
		(4) IR observations of the stars, aiming to study the amplitude and character of the bolometric luminosity variations of the Miras; evaluation of the dust envelope parameters; tracing the correlation between IR and maser emission.
	comet.sai.msu.ru /~gmr/miras.html (1408 words)

	iqexpand.com (Site not responding. Last check: 2007-08-19)
		Double stars here are treated individually while other lists may combine their brightness.
		The asterisk at the spectral type of some stars indicates that it is a binary; the spectral type of the...
		List of stars by constellation List of nearest stars List of nearest bright stars List of brightest stars (apparent andamp; absolute magnitude) List of largest stars (by diameter) List of heaviest stars (by...
	list_of_brightest_stars.iqexpand.com (375 words)

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	CONK! Encyclopedia: List_of_reference_tables (Site not responding. Last check: 2007-08-19)
		Encyclopedia for sorting tables, one alternative (where the lists below actually include tables) would be to copy the javascript link from here (control-click the "sort table" link to copy the link) and once you have come back to this page, paste the javascript code you have copied into your URL window and run it.
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	AVSOMAT (Site not responding. Last check: 2007-08-19)
		CCD photometry of variable stars can be used for fainter stars, provides a documentation through the image file and allows for a degree of magnitude increase in precision.
		Usually, the reduction step involves: visual identification of the variable star and of reference stars on the image by comparing it with a chart (such as an aavso chart), measurement of the flux of the variable and reference stars and estimation of the variable star magnitude.
		The electronic chart is a file with descriptions of the variable star, the reference stars and guide stars which are used to identify the field.
	astro.corlan.net /avsomat/oldindex.html (1322 words)

	Variable Star Observing
		These are called "Variable Stars", and they are quite a lot of fun to observe on a regular basis.
		Mira type stars are called long period variables because Mira takes a long time to complete one cycle of variation, but there are many more complex examples.
		In general, one star is larger and less dense, what's called an M class giant, and one star that's denser and hotter.
	www.stargazing.net /astroman/AAVSO.html (1057 words)

	[No title]
		However, no new types of variable stars are introduced in the present Name-list; the revision of the classification system is a task for future research.
		The list of Hipparcos variables was identified with existing catalogues of spectroscopic variables; as a result, several stars were reclassified from pulsating stars to ellipsoidal variables.
		The extreme case of V1472 Aql, reclassified from a red semiregular variable to a possible eclipser, was described by Samus (1997).
	www.sai.msu.su /groups/cluster/gcvs/gcvs/nl74/readme (711 words)

	Read about Semiregular variable star at WorldVillage Encyclopedia. Research Semiregular variable star and learn about ... (Site not responding. Last check: 2007-08-19)
		supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities.
		light curves may be rather different and variable with each cycle.
		SV Ursae Majoris are examples of this class.
	encyclopedia.worldvillage.com /s/b/Semiregular_variable (356 words)

	VSTARSUSP - Catalog of Suspected Variable Stars
		Vmax The magnitude of the star at maximum light.
		Below is a table of brief descriptions of variability types; more complete descriptions can be found in Volume 1 of the General Catalog of Variable Stars, 4th Edition (Kholopov et al.
		Most luminosity classes are III to V, but if a star is a supergiant, more detailed classification information is given in the remarks to the published catalog.
	heasarc.gsfc.nasa.gov /W3Browse/all/vstarsusp.html (463 words)

	ADC Quick Reference: Variable Stars (Site not responding. Last check: 2007-08-19)
		J/AJ/110/1186 SX Phe stars in NGC 5053 (Nemec+ 1995)
		J/A+AS/125/343 RR Lyr stars in omega Cen (Kaluzny+ 1997)
		J/A+AS/106/397 Sra and Srb semiregular variables (Kerschbaum+, 1994)
	adc.gsfc.nasa.gov /adc/quick_ref/ref_varstar.html (1315 words)

	Variable star designation - All About All (Site not responding. Last check: 2007-08-19)
		Variable stars are named using a variation on the Bayer designation format of Identifier .
		In previous centuries few variable stars were known, so it seemed reasonable to use the letters of the Roman alphabet, starting from the letter R so as to avoid confusion with letter spectral types.
		Unfortunately the advent of photography made the number of variables pile up quickly and variable star names soon fell into the Bayer trap of reaching the end of the alphabet while still having stars to name.
	www.answers-zone.com /article/Variable_star_designation (264 words)

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	Rec Fresh : Article 'Lists of articles by category' (Site not responding. Last check: 2007-08-19)
		None of these are yet comprehensive or up-to-date, but filling in or creating these lists will create an easy way to track articles by their categories, as well as creating an implicit to-do list of topics for which articles have not yet been written.
		If a "List of" page does not yet exist, or is empty, a link is provided to the next best overview of articles in that category.
		Since these categories span broad disciplines of knowledge, these lists complement those found on the list of reference tables, which cover very narrow, specific topics.
	www.rec-fresh.net /DisplayArticle199698.html (230 words)

	List of semiregular variable stars : Semiregular variable
		terms defined : List of semiregular variable stars : Semiregular variable
		All is still licensed under the GNU FDL.
		The honour done to Madelinette was an It realised that this kind of demonstration was less.html">less expensive, and less the habitants could be better exercised in applauding Madelinette and in.
	www.termsdefined.net /se/semiregular-variable.html (275 words)

	IngentaConnect A comparison of OH and H2O maser properties of Mira and semiregul... (Site not responding. Last check: 2007-08-19)
		A sample of 17 Miras and nine semiregular variable stars was simultaneously observed in the OH and H
		OH emission from the semiregulars usually occurs at greater redshifts and blueshifts with respect to the stellar velocities than OH emission observed from the Miras.
		It is suggested that some semiregular variables with maser emission may be in a later stage of stellar evolution than the Miras.
	www.ingentaconnect.com /content/bsc/mnr/1999/00000304/00000002/art02321 (274 words)

	Amazon.com: Books: Observing Variable Stars : A Guide for the Beginner (Site not responding. Last check: 2007-08-19)
		Observing Variable Stars, Novae, and Supernovae by Gerald North
		This book can effectively take you through the very beginnings of variable star observation and set you on your way to becoming a productive observer able to submit valid data to organizations like the American Association of Variable Star Observers.
		A great book for the amateur astronomer that is looking for new stars to observe or wishes to contribute observations of variable stars to professional organizations.
	www.amazon.com /exec/obidos/tg/detail/-/0521627559?v=glance (675 words)

	Business Fresh : Article 'List of academic disciplines' (Site not responding. Last check: 2007-08-19)
		This is a list of academic disciplines (and academic fields).
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	STS-95 bei eLexi - das Onlinelexikon (Site not responding. Last check: 2007-08-19)
		SPACEHAB modules have supported various Shuttle science missions along with several of the joint Shuttle-Mir missions.
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		Image:Map of Oklahoma highlighting Lincoln County.png\nLincoln County is a county located in the U.S. State of Oklahoma.
	www.elexi.de /en/s/st/sts_95.html (660 words)

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