Virpi Sinikka Niemelä

Research interests

Publications

• The periodicity of the η Carinae events

  Monthly Notices of the Royal Astronomical Society · 2008 · 10.1111/j.1365-2966.2007.12815.x

• The very massive X-ray bright binary system Wack 2134 (= WR 21a)★

  Monthly Notices of the Royal Astronomical Society · 2008 · 10.1111/j.1365-2966.2008.13684.x

• Long-term optical monitoring of η Carinae

  Astronomy and Astrophysics · 2008 · 10.1051/0004-6361:200810700

• The first orbital solution for the massive colliding-wind binary HD 93162 (≡WR 25)

  Astronomy and Astrophysics · 2006 · 10.1051/0004-6361:20065618

• Pismis 24-1: The Stellar Upper Mass Limit Preserved

  LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · 2006

• An X‐Ray Investigation of the NGC 346 Field in the Small Magellanic Cloud I. The Luminous Blue Variable HD 5980 and the NGC 346 Cluster

  The Astrophysical Journal · 2002 · 10.1086/343079

• Magellanic Cloud WC/WO Wolf-Rayet stars - II. Colliding winds in binaries

  Monthly Notices of the Royal Astronomical Society · 2001 · 10.1046/j.1365-8711.2001.04127.x

• Magellanic Cloud WC/WO Wolf-Rayet stars - I. Binary frequency and Roche lobe overflow formation

  Monthly Notices of the Royal Astronomical Society · 2001 · 10.1046/j.1365-8711.2001.04126.x

• Spatially Resolved STIS Spectra of WR + OB Binaries with Colliding Winds

  The Astronomical Journal · 2001 · 10.1086/324459

• Optical spectroscopy of XMEGA targets in the Carina Nebula - III. The multiple system Tr 16-104 ( CPD -59 2603)

  Monthly Notices of the Royal Astronomical Society · 2001 · 10.1046/j.1365-8711.2001.04681.x

• Optical spectroscopy of X-Mega targets - II. The massive double-lined O-type binary HD 93205

  Monthly Notices of the Royal Astronomical Society · 2001 · 10.1046/j.1365-8711.2001.04500.x

• A Deep Survey for Galactic Wolf-Rayet Stars. II. Implications for Galactic Structure and Massive Star Formation

  The Astronomical Journal · 1999 · 10.1086/300908

• The Luminous Eclipsing SMC OB + WN Binary HD 5980 before and during the Recent LBV‐like Outburst: An Extreme Case of Colliding Winds

  The Astrophysical Journal · 1998 · 10.1086/305475

• [ITAL]Hubble[/ITAL] [ITAL]Space[/ITAL] [ITAL]T[/ITAL][ITAL]elescope[/ITAL] Detection of Optical Companions of WR 86, WR 146, and WR 147: Wind Collision Model Confirmed

  The Astronomical Journal · 1998 · 10.1086/300320

• The OB associations LH 101 and LH 104 in the HII region N158 of the LMC

  Astronomy & Astrophysics Supplement Series · 1998 · 10.1051/aas:1998241

• Sudden Luminous Blue Variable--Like Behavior of the Wolf-Rayet Binary System HD 5980 in the Small Magellanic Cloud

  The Astrophysical Journal · 1995 · 10.1086/187921

• Photometry, polarimetry, spectroscopy, and spectropolarimetry of the enigmatic Wolf-Rayet star EZ Canis Majoris

  The Astrophysical Journal · 1992 · 10.1086/171786

• Wolf-Rayet stars in the Magellanic Clouds. VI - Spectroscopic orbits of WC binaries and implications for W-R evolution

  The Astrophysical Journal · 1990 · 10.1086/168232

• The Wolf-Rayet population in 30 Doradus and its surroundings

  The Astrophysical Journal · 1987 · 10.1086/164906

• The young open cluster NGC 346 in the Small Magellanic Cloud

  Publications of the Astronomical Society of the Pacific · 1986 · 10.1086/131910

• The supernova 1983k in NGC 4699 - Clues to the nature of Type II progenitors

  The Astrophysical Journal · 1985 · 10.1086/162863

• Wolf-Rayet stars in the Magellanic Clouds. II - The peculiar eclipsing binary HD 5980 in the SMC

  The Astrophysical Journal · 1982 · 10.1086/159969

• The binary central star of NGC 2346 and the extinction puzzle

  The Astrophysical Journal · 1981 · 10.1086/159368

• A radial velocity study of three WN stars and an O3f star in the Carina Nebula

  The Astrophysical Journal · 1979 · 10.1086/156837

• The central star of NGC 1360: a spectroscopic binary within a planetary nebula

  Monthly Notices of the Royal Astronomical Society · 1977 · 10.1093/mnras/178.3.409

Current projects

No projects listed.