Садржај
Слике
Уплоадјуј своје слике
DSS Images Other Images
Везани чланци
On the peculiar spectrum of the optical remnant of supernova A.D. 1006
Three spectral records of the faint optical filaments in the remnant ofSN 1006 show a nearly pure Balmer emission-line spectrum; the usualforbidden lines of O I, O II, O III, N II, and S II are either very weakor absent. No explanation is offered for the peculiar spectrum, but itis noted that SNR 1006 is the second remnant (after Tycho's) known tohave such a spectrum. To explain the Balmer decrement in terms of case Brecombination requires the extinction to be AV = 3 + or - 1,of which only about 0.75 mag seems to be due to galactic foregroundobscuration. The radial velocity of the filaments is nearly constantover 5 arcmin and surprisingly low, approximately -40 km/s relative tothe LSR. The absence of further, similar filaments in a 3 x 3 deg fieldcentered on the radio remnant supports van den Bergh's (1976)identification of the filaments with the optical remnant of SN 1006.
|
Додај нови чланак
Линкови у сродству са темом
Додај нови линк
Чланови следећих група \:
|
Посматрања и Астрометриски подаци
| Сазвежђа: | Кентаур |
| Ректацензија: | 15h02m21.59s |
| Deклинација: | -41°41'26.2" |
| Apparent магнитуда: | 7.584 |
| Даљина: | 246.305 parsecs |
| Proper motion RA: | -10.2 |
| Proper motion Dec: | -26.8 |
| B-T magnitude: | 9.5 |
| V-T magnitude: | 7.743 |
Каталог и designations:
|
INHABITED SKY
