DK Lacertae (Nova Lacertae 1950) was a nova, which lit up in the constellation Lacerta in 1950. The nova was discovered by Charles Bertaud of the Paris Observatory on a photographic plate taken on 23 January 1950. At the time of its discovery, it had an apparent magnitude of 6.1. DK Lacertae reached peak magnitude 5.0, making it easily visible to the naked eye. X-ray emission has been detected from this system. A faint shell was detected around the source in 1995, with a radius of about 2.0″–2.5″, but later observations with the Hubble Space Telescope failed to detect the shell.
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| - DK Lacertae (de)
- DK Lacertae (en)
- DK Lacertae (es)
- DK Lacertae (fr)
- DK Lacertae (sv)
- 蝎虎座DK (zh)
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| - DK Lacertae war eine Nova, die 1950 im Sternbild Eidechse aufleuchtete. DK Lacertae erreichte Messungen zufolge eine Helligkeit von 5,0 mag. Der Namensteil „DK“ folgt den Regeln zur Benennung veränderlicher Sterne und besagt, dass DK Lacertae der 133te veränderliche Stern ist, der im Sternbild Eidechse (Lacerta) entdeckt wurde. (de)
- DK Lacertae (ou Nova Lacertae 1950) était une nova qui survint en 1950 dans la constellation du Lézard. Elle atteignit une magnitude minimale (correspondant à une luminosité maximale) de 5,7. Sa distance, estimée à l'aide de la mesure de sa parallaxe par le satellite Gaia, est très approximativement d'environ 2 500 pc (∼8 150 a.l.). (fr)
- DK Lacertae eller Nova Lacertae 1950 var en snabb nova i stjärnbilden Ödlan. Novan upptäcktes den 23 januari 1950 av den franske astronomen Charles Bertaud. DK Lacertae nådde magnitud +5,0 i maximum och avklingade sedan snabbt. Den har nu en ljusstyrka av 19:e magnituden. (sv)
- 蝎虎座DK（DK Lacertae），也称1950年蝎虎座新星，是一颗位于蝎虎座的新星，1950年爆发。爆发时最亮视星等为5.0等。 (zh)
- DK Lacertae (Nova Lacertae 1950) was a nova, which lit up in the constellation Lacerta in 1950. The nova was discovered by Charles Bertaud of the Paris Observatory on a photographic plate taken on 23 January 1950. At the time of its discovery, it had an apparent magnitude of 6.1. DK Lacertae reached peak magnitude 5.0, making it easily visible to the naked eye. X-ray emission has been detected from this system. A faint shell was detected around the source in 1995, with a radius of about 2.0″–2.5″, but later observations with the Hubble Space Telescope failed to detect the shell. (en)
- La DK Lacertae o Nova Lacertae 1950 es el nombre que los astrónomos le dieron a la nova aparecida en la constelación de Lacerta, en el año 1950. Disminuyó en brillo a una velocidad moderadamente rápida, mientras mostraba variaciones de luminosidad. Se detectó un débil caparazón alrededor de la fuente en 1995, que muestra un radio de aproximadamente 2.0″–2.5". (es)
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| - DK Lacertae (Nova Lacertae 1950) was a nova, which lit up in the constellation Lacerta in 1950. The nova was discovered by Charles Bertaud of the Paris Observatory on a photographic plate taken on 23 January 1950. At the time of its discovery, it had an apparent magnitude of 6.1. DK Lacertae reached peak magnitude 5.0, making it easily visible to the naked eye. DK Lacertae's post-eruption light curve was remarkable for the large number of outbursts of a magnitude or more which occurred in the months after the main nova event. Strope et al. (2010) reported that there were 14 of these "jitters" in the light curve, and they used this star as the prototype object for their type J light curve class. It took about 60 days for the nova to drop from peak brightness by 3 magnitudes, which makes DK Lacertae a "fast" nova. X-ray emission has been detected from this system. All novae are binary stars, with a "donor" star orbiting a white dwarf. The donor star is so close to the white dwarf that matter is transferred from the donor to an accretion disk surrounding the white dwarf. In the case of DK Lacertae, Shara et al. (2018) estimate that the white dwarf has a mass of 1.03M☉ and the donor star is transferring 3.4 × 10−8 M☉ yr−1 to the accretion disk. The orbital periods of nova are typically a few hours, but no photometric periodicity on that timescale has been found for DK Lac, suggesting that we are viewing the accretion disk nearly face-on. A faint shell was detected around the source in 1995, with a radius of about 2.0″–2.5″, but later observations with the Hubble Space Telescope failed to detect the shell. (en)
- DK Lacertae war eine Nova, die 1950 im Sternbild Eidechse aufleuchtete. DK Lacertae erreichte Messungen zufolge eine Helligkeit von 5,0 mag. Der Namensteil „DK“ folgt den Regeln zur Benennung veränderlicher Sterne und besagt, dass DK Lacertae der 133te veränderliche Stern ist, der im Sternbild Eidechse (Lacerta) entdeckt wurde. (de)
- La DK Lacertae o Nova Lacertae 1950 es el nombre que los astrónomos le dieron a la nova aparecida en la constelación de Lacerta, en el año 1950. Disminuyó en brillo a una velocidad moderadamente rápida, mientras mostraba variaciones de luminosidad. Se detectó un débil caparazón alrededor de la fuente en 1995, que muestra un radio de aproximadamente 2.0″–2.5". DK Lacertae alcanzó un brillo de magnitud 5.0, si bien en publicaciones posteriores se indica que fue de 5,4 e incluso 6,0. Chandra detectó emisiones de rayos X desde la fuente, lo cual es un fenómeno bastante raro, si bien no se observó una variabilidad significativa. En estrellas en quiescencia, estas emisiones pueden tener dos orígenes: la liberación de energía gravitacional a través de la acumulación de material en la enana blanca o por choques adiabáticos en la nova interactuando con el entorno circunestelar. En este caso, se considera que la primera opción tiene mayores posibilidades. (es)
- DK Lacertae (ou Nova Lacertae 1950) était une nova qui survint en 1950 dans la constellation du Lézard. Elle atteignit une magnitude minimale (correspondant à une luminosité maximale) de 5,7. Sa distance, estimée à l'aide de la mesure de sa parallaxe par le satellite Gaia, est très approximativement d'environ 2 500 pc (∼8 150 a.l.). (fr)
- DK Lacertae eller Nova Lacertae 1950 var en snabb nova i stjärnbilden Ödlan. Novan upptäcktes den 23 januari 1950 av den franske astronomen Charles Bertaud. DK Lacertae nådde magnitud +5,0 i maximum och avklingade sedan snabbt. Den har nu en ljusstyrka av 19:e magnituden. (sv)
- 蝎虎座DK（DK Lacertae），也称1950年蝎虎座新星，是一颗位于蝎虎座的新星，1950年爆发。爆发时最亮视星等为5.0等。 (zh)
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