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Statements

Subject Item
dbr:List_of_novae_in_2018
dbo:wikiPageWikiLink
dbr:V906_Carinae
Subject Item
dbr:V906_Carinae
rdf:type
dbo:CelestialBody owl:Thing schema:Place dbo:Location dbo:Star dbo:Place
rdfs:label
V906 Carinae V906 Carinae
rdfs:comment
V906 Carinae, also known as Nova Carinae 2018, was a nova in the Milky Way galaxy which appeared in the constellation Carina, near the 5th magnitude star HD 92063. It was discovered on images taken on 20.32 March 2018 by the All Sky Automated Survey for SuperNovae (ASAS-SN] telescope at the Cerro Tololo Inter-American Observatory. The ASAS-SN group assigned the name ASASSN-18fv to the object. The discovery image was saturated, allowing researchers to determine only that the object was brighter than apparent magnitude 10. An earlier image obtained by ASAS-SN on 26.32 March 2018 showed the nova was a magnitude ~10.4 object at that time, and the object was not detected on ASAS-SN images taken on 15.34 March 2018 and earlier. V906 Carinae, eller Nova Carinae 2018, var en ljus nova i nordöstra delen av stjärnbilden Kölen upptäckt den 20 mars 2018 av All Sky Automated Survey för supernovor. Den var tidigare känd under beteckning ASASSN-18fv och belägen i närheten av HD 92063, en stjärna av magnitud 5. Före novautbrottet var den en stjärna av Gaia-magnitud 20,1. Den 21 mars hade den ökat i ljusstyrka till Gaia-magnitud 7,80 (skenbar magnitud 7,45), och till magnitud 6,62 senare samma dygn.
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dbc:Astronomical_objects_discovered_in_2018 dbc:Objects_with_variable_star_designations dbc:Novae dbc:Carina_(constellation)
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56942428
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1016420998
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dbr:Carina_(constellation) dbr:Angstrom dbr:Gaia_(spacecraft) dbc:Astronomical_objects_discovered_in_2018 dbr:Fermi_Gamma-ray_Space_Telescope dbc:Objects_with_variable_star_designations dbr:J2000.0 dbr:Astronomy_Picture_of_the_Day dbr:Nova dbr:All_Sky_Automated_Survey_for_SuperNovae dbr:Apparent_magnitude dbr:Gamma_ray dbr:Nanosatellite dbr:Spectral_type dbr:HD_92063 n17:V906CarLightCurve.png dbr:Variable_star_designation dbr:Visual_magnitude dbc:Novae dbr:White_dwarf dbr:BRITE dbr:Milky_Way dbr:Transiting_Exoplanet_Survey_Satellite dbr:Charge-coupled_device dbr:Cerro_Tololo_Inter-American_Observatory dbr:Electromagnetic_radiation dbc:Carina_(constellation)
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dbt:Short_description dbt:Stars_of_Carina dbt:Val dbt:2018_in_space dbt:Reflist dbt:Starbox_reference dbt:Solar_mass dbt:Starbox_begin dbt:Starbox_catalog dbt:Starbox_astrometry dbt:Starbox_image dbt:Starbox_observe dbt:Starbox_detail dbt:Starbox_end dbt:Starbox_character dbt:APOD dbt:Location_mark dbt:RA dbt:DEC
dbo:thumbnail
n4:Carina_constellation_map.svg?width=300
dbp:appmagV
5.8
dbp:component
Donor White dwarf
dbp:constell
dbr:Carina_(constellation)
dbp:date
2018-03-25
dbp:epoch
dbr:J2000.0
dbp:luminosity
0.28 0.03
dbp:mass
0.23
dbp:pError
0.3113
dbp:parallax
0.314
dbp:propMoDec
3.267
dbp:propMoRa
-7.511
dbp:radius
~0.24 0.03
dbp:temperature
4951 15000
dbp:title
Announcing Nova Carinae 2018
dbp:variable
dbr:Nova
dbo:abstract
V906 Carinae, also known as Nova Carinae 2018, was a nova in the Milky Way galaxy which appeared in the constellation Carina, near the 5th magnitude star HD 92063. It was discovered on images taken on 20.32 March 2018 by the All Sky Automated Survey for SuperNovae (ASAS-SN] telescope at the Cerro Tololo Inter-American Observatory. The ASAS-SN group assigned the name ASASSN-18fv to the object. The discovery image was saturated, allowing researchers to determine only that the object was brighter than apparent magnitude 10. An earlier image obtained by ASAS-SN on 26.32 March 2018 showed the nova was a magnitude ~10.4 object at that time, and the object was not detected on ASAS-SN images taken on 15.34 March 2018 and earlier. V906 Carinae was featured in the Astronomy Picture of the Day on 25 March 2018. Pre-discovery images of V906 Carinae were matched to a star of Gaia magnitude 20.1. On 21 March 2018, it had brightened to a Gaia magnitude 7.80 (visual magnitude 7.45), and to magnitude 6.62 later the same day. Also on 21 March 2018, long exposure spectrographic measurements of ASASSN-18fv, specifically in the 3800Å to 7300Å range, were captured using CCD imaging. Detailed analysis of the spectral data confirmed that ASASSN-18fv exhibited characteristics of a classical nova. All novae are binary stars, with a "donor" star orbiting a white dwarf. The two stars are so close to each other that material is transferred from the donor to the white dwarf. In the case of V906 Carinae, data from the Transiting Exoplanet Survey Satellite suggests that the binary system has an orbital period of either 1.641 hours or twice that value. The mass of the white dwarf has been estimated to be 0.71 M☉, and the donor is believed to be a dwarf of spectral type K or M and a mass of 0.23 - 0.43 M☉. One of the stars monitored by the Bright-star Target Explorer (BRITE) nanosatellite constellation was HD 92063. V906 Carinae was close enough to that star to be serendipitously observed by BRITE. In the BRITE data, the nova's maximum brightness occurred on 14 April 2018. BRIGHT provided a measurement of the nova's brightness every 1.6 hours, allowing the fluctuations near the peak of the outburst to be seen clearly. There were eight post-maximum flares with amplitudes of a few tenths of a magnitude each of which lasted 1 to 3 days. These flares in the visible portion of the EM spectrum occurred at the same times that γ-ray flares were seen by Fermi-LAT. Because the γ-ray flares are believed to arise from shocks in the ejected material, their correlation with visible flares suggests that most of the visible light from the nova may be produced in shocks, rather than the nuclear burning on the white dwarf's surface. V906 Carinae, eller Nova Carinae 2018, var en ljus nova i nordöstra delen av stjärnbilden Kölen upptäckt den 20 mars 2018 av All Sky Automated Survey för supernovor. Den var tidigare känd under beteckning ASASSN-18fv och belägen i närheten av HD 92063, en stjärna av magnitud 5. Före novautbrottet var den en stjärna av Gaia-magnitud 20,1. Den 21 mars hade den ökat i ljusstyrka till Gaia-magnitud 7,80 (skenbar magnitud 7,45), och till magnitud 6,62 senare samma dygn.
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