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TX Piscium
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Stars/galaxy News
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2
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2471
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TX Piscium (19 Psc) is a variable carbon star in the constellation Pisces. It is amongst the reddest stars known, with a lovely reddish hue when seen in binoculars. Read more Position(2000): RA 23 46 23.5165, Dec +03 29 12.519
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Cataclysmic variable
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Stars/galaxy News
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16
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15603
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Title: Discovery of a new cataclysmic variable through optical variability and X-ray emission
Authors: Magaretha L. Pretorius, Christian Knigge
Aims: We present discovery observations of the new cataclysmic variable star (CV) 1RXS J092737.4-191529, as well a...
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Z Andromedae
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Stars/galaxy News
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5
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3266
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The symbiotic variable star Z Andromedae is in outburst. The star is currently at magnitude 9.0 The cataclysmic variable star is a prototype for symbiotic variables (ZANDs). The system consists of a primary white dwarf and a secondary M giant star. Apparent magnitude: (V) 10.53 Max magnitude...
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BZ Ursae Majoris
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Events
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1
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1928
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The cataclysmic variable star BZ Ursae Majoris appears to be in outburst.
It was discovered by Keith Graham on June 22nd at mag 11.5.
Outbursts are short and usually last only 3-4 days.
The
The "dwarf nova" BZ UMa is located in Ursa Major, an...
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chi Pegasus
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Stars/galaxy News
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0
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1763
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Variable Star Magnitude: 4.79 Spectral type: M2III Distance: 250 - 500 light years away New catalogue of Suspected Variable stars (NSV) 99 Position (2000): RA 00 14 36.1645, Dec +20 12 24.126
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LBV R71
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Stars/galaxy News
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2
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2567
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Outburst of Blue Variable (LBV) R71 (= HDE 269006, ASAS 050207-7120.2, V733 LMC), in the Large Magellanic Cloud (LMC). OUTBURST OF R71 IN THE LARGE MAGELLANIC CLOUD R. Gamen, Instituto de Astrofisica de La Plata, CONICET; R. Barba, Universidad de La Serena and Insituto de Ciencias Astronomicas y d...
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Carbon stars
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Stars/galaxy News
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4
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3718
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Carbon stars poster.
Download HERE.
(1282 X 1657 .JPG)
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EG Cancri
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Astronomy News
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0
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1611
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The WZ Sge-type dwarf nova EG Cancri is in outburst. The last outburst occurred in November 1996, and the outburst before that, was in November 1977. The cataclysmic variable was first discovered by M. Huruhata in 1983. The 1977 outburst reached a maximum brightness of 11.9. The nova has long inter...
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V1647 Orionis
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Stars/galaxy News
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7
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3262
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A new star appeared in the constellation of Orion in late 2003 when the young pre-main sequence star V1647 Orionis went into outburst. The eruption and huge increase in brightness of the object resulted in the appearance of a reflection nebula called McNeils Nebula, named after the amateur astrono...
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Asymptotic giant branch (AGB) variables
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Stars/galaxy News
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6
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5347
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Title: AGB Variables and the Mira Period-Luminosity Relation Authors: Patricia A. Whitelock, Michael W. Feast, Floor van Leeuwen Published data for large amplitude asymptotic giant branch variables in the Large Magellanic Cloud are re-analysed to establish the constants for an infrared (K) p...
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U Geminorum
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Stars/galaxy News
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7
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2440
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Title: X-ray Spectral Variations of U Gem from Quiescence to Outburst
Authors: T. Guver, C. Uluyazi, M.T. Ozkan, E. Gogus
In this paper researchers report the discovery of a high energy component of the X-ray spectra of U Geminorum, which can be observed while the source is in...
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V762 Cassiopeiae
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Stars/galaxy News
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0
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6277
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[url=http://www.adrive.com/public/5df2bebfcdf76db969b97feba80757078d79314f47b20ce633e2...
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W UMa systems
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Stars/galaxy News
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7
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8754
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Title: The dynamical stability of W Ursae Majoris-type systems Authors: Lifang Li, Fenghui Zhang Theoretical study indicates that a contact binary system would merge into a rapidly rotating single star due to tidal instability when the spin angular momentum of the system is more than a third of it...
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CH Cygni
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Stars/galaxy News
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8
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4123
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Title: The symbiotic star CH Cygni. I. An analysis of the shocked nebulae at different epochs Authors: M. Contini (1,2), R. Angeloni (1,2), P. Rafanelli (1) ((1) Dipartimento di Astronomia, University of Padova, Italy; (2) School of Physics and Astronomy, Tel-Aviv University, Israel) Context....
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WZ Sagittae
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Stars/galaxy News
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2
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2300
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WZ Sagittae is an unusual SU UMa star Period of about 4400 days (?). Magnitude range: 10.1 v - 19 V WZ Sagittae.kmz Position (2000): RA 20h 07m 36.53s, Dec +17° 42' 15.3" The discovery of a large disc of dust around a binary star system could force astronomers to rethink their computer models of the...
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Variables
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Stars/galaxy News
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5
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5401
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Title: Searching for Variables in One of the WHAT Fields
Authors: Avi Shporer (1), Tsevi Mazeh (1), Amit Moran (1), Gaspar Bakos (2), Geza Kovacs (3) ((1) Wise Observatory, TAU (2) CfA (3) Konkoly Observatory)
We present preliminary results on a single field observed by WHAT...
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1835+25 Var_Her_04
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Stars/galaxy News
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0
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1646
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Title: Spitzer Observations of Var Her 04: Possible Detection of Dust Formation in a Super-Outbursting TOAD
Authors: David R. Ciardi, Stefanie Wachter, D. W. Hoard, Steve B. Howell, Gerard T. van Belle
Researchers present four MIPS (24 µm) and two IRAC (3.6, 4.5, 5.8, and 8....
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Chi Cygni
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Stars/galaxy News
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10
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9716
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Chi Cygni is a giant-star Mira variable that can reach magnitude 3.5 for some time during a 408.05-day variation period, from magnitude 13.4.
Chi Cygni is a rare class S (S6) star, highly enriched in zirconium, that is about 345 light year...
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MWC 419
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Stars/galaxy News
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1
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1864
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Astronomers using the W. M. Keck Observatory have peered far into a young planetary system, giving an unprecedented view of dust and gas that might eventually form worlds similar to Jupiter, Venus or even Earth. "Because the gas, dust and debris that orbit young stars provide the raw material...
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P Cygni
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Stars/galaxy News
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4
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2568
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Title: A deep mosaic of (O III) 5007 A CCD images of the environment of the LBV star P Cygni
Authors: P. Boumis (1), J. Meaburn (1,2), M. P. Redman (3), F. Mavromatakis (4) ((1) Institute of Astronomy & Astrophysics, National Observatory of Athens, Greece, (2) Jodrell Bank Obse...
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CW Leonis
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Stars/galaxy News
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7
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6345
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IRC +10216 or CW Leonis is the best studied carbon star, but also a very peculiar one with the central star being embedded in a thick dust envelope. Therefore, its energy is emitted mostly at infrared wavelengths: in fact, IRC +10216 is the brightest object in the sky at a wavelength of 10 m. Recent spec...
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IK Pegasi
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Stars/galaxy News
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0
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3262
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IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. At a distance of about 150 light years from the Solar System, it is just luminous enough to be seen with the unaided eye. The primary (IK Pegasi A) is a main sequence, A-class star that displays minor pulsations in luminosity. I...
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BQ Camelopardalis
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Stars/galaxy News
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5
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4018
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On the 17th October, 2008, the Swift satellite detected increased activity in the 15-50 keV band for the transient pulsar and High Mass X-ray Binary V0332+53. The Be/neutron star system contains the variable BQ Cam, which the optical counterpart of the X-ray binary source V0332+53. Spin Period: ...
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SDSS J123813.73-033933.0
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Stars/galaxy News
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0
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1612
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Title: SDSS J123813.73-033933.0, a cataclysmic variable evolved beyond the period minimum Authors: A. Aviles, S. Zharikov, G. Tovmassian, R. Michel, M. Tapia, M. Roth, V. Neustroev, C. Zurita, M. Andreev, A. Sergeev, E. Pavlenko, V. Tsymbal, G.C. Anupama, U.S. Kamath, D.K. Sahu We present infr...
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W Ursae Majoris
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Stars/galaxy News
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1
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2090
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W Ursae Majoris (W UMa) is a variable star in the constellation Ursa Major. It is an eclipsing contact binary whose two component stars share a common outer layer, and is the prototype of a class of contact binary variables known as W Ursae Majoris variables. [url=http://en.wikipedia.org/wiki/W_...
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Variable Stars
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Stars/galaxy News
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8
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5067
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Title: The Exciting Star of the Berkeley 59/Cepheus OB4 Complex and Other Chance Variable Star Discoveries Authors: Daniel J. Majaess, David G. Turner, David J. Lane, Kathleen E. Moncrieff A study is presented regarding the nature of several variable stars sampled during a campaign of photometr...
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Delta Scuti
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Stars/galaxy News
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0
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1711
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Title: The Blazhko Effect in Delta Scuti and other Groups of Pulsating Stars Authors: Michel Breger Amplitude and period variations have been detected in almost all types of pulsating stars. Many of these modulations are nearly periodic. In RR Lyrae stars the phenomenon in known as the Blazhko Eff...
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RR Lyrae stars
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Stars/galaxy News
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17
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9819
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Title: Carbon-rich RR Lyr type stars Authors: George Wallerstein, V. V. Kovtyukh, S. M. Andrievsky We have derived CNO abundances in 12 RR Lyrae stars. Four stars show [C/Fe] near 0.0 and two stars show [C/Fe] = 0.52 and 0.65. Red giant branch stars, which are known to be the predecessors of RR Lyrae st...
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Eclipsing Binary FS Aur-79
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Stars/galaxy News
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2
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2687
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Title: Late-Type Near-Contact Eclipsing Binary [HH97] FS Aur-79 Authors: S. J. Austin, J. W. Robertson, C. Tycner, T. Campbell, R. K. Honeycutt The secondary photometric standard star #79 for the FS Aur field (Henden & Honeycutt 1997) designated as [HH97] FS Aur-79 (GSC 1874 399) is a short pe...
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