Astronomers discover a luminous nuclear transient arxiv
We report the discovery of Swift J221951-484240 , a luminous slow-evolving blue transient that was detected by the Neil Gehrels Swift Observatory Ultra-violet/Optical Telescope during the follow-up of Gravitational Wave alert S190930t, to which it is unrelated. Swift/UVOT photometry shows the UV spectral energy distribution of the transient to be well modelled by a slowly shrinking black body with an approximately constant temperature of T~2.5x10^4 K. At a redshift z=0.
1x10^45 erg s^-1 and a total radiated energy of E>2.6x10^52 erg. The archival WISE IR photometry shows a slow rise prior to a peak near the discovery date. Spectroscopic UV observations display broad absorption lines in N V and O VI, pointing toward an outflow at coronal temperatures. The lack of emission in the higher H~Lyman lines, N I and other neutral lines is consistent with a viewing angle close to the plane of the accretion or debris disc.
日本 最新ニュース, 日本 見出し
Similar News:他のニュース ソースから収集した、これに似たニュース記事を読むこともできます。
Gayle Says Taylor Swift Gave Everyone on the Eras Tour a Very Sweet Keepsake Gift: ‘She is Like a Big Sister To Me’The singer also recalled sitting in the very “last row” at Swift’s 2018 “Reputation” tour.
続きを読む »
Taylor Swift Seemingly Responds to Rumors She's Back Together With Matty HealyIs Taylor getting back together with Matty? She did say, 'Karma is my boyfriend' ......
続きを読む »
Taylor Swift in Denver: Cheapest tickets, where to buy last-minute ticketsHere is how you can secure tickets to Swift's Denver show.
続きを読む »
Ticketmaster halts Taylor Swift ticket sales in France, cites issue with third-party providerAfter some fans reported issues with accessing Ticketmaster's site, sales for 6 of Taylor Swift's upcoming shows in Paris and Lyon were abruptly postponed.
続きを読む »
Alert TikTok: Taylor Swift Eras Merch Is On Sale for Amazon Prime DayStock up and save for your next T. Swift experience.
続きを読む »
Taylor Swift ducks as fans throw bracelets at pop star on The Eras TourTaylor Swift fans threw bracelets at the pop star as she exited backstage during her Kansas City tour stop of The Eras Tour. Swift is set to perform in Denver next.
続きを読む »