dc.contributor.author |
Koenigsberger, G |
|
dc.contributor.author |
Georgiev, L |
|
dc.contributor.author |
Peimbert, M |
|
dc.contributor.author |
Walborn, NR |
|
dc.contributor.author |
Barba, R |
|
dc.contributor.author |
Niemela, VS |
|
dc.contributor.author |
Morrell, N |
|
dc.contributor.author |
Tsvetanov, Z |
|
dc.contributor.author |
Schulte-Ladbeck, R |
|
dc.date.accessioned |
2011-01-22T10:27:28Z |
|
dc.date.available |
2011-01-22T10:27:28Z |
|
dc.date.issued |
2001 |
|
dc.identifier.issn |
0004-6256 |
|
dc.identifier.uri |
http://hdl.handle.net/11154/2013 |
|
dc.description.abstract |
(2) ISM components in the SMC (V-hel = +87 +/- 6, +110 +/- 6, +132 +/- 6, +158 +/- 8, +203 +/- 15 km s(-1)) |
en_US |
dc.description.abstract |
(#) SMC supernova remnant SNR 0057 - 7226 components (V-hel = +312 +/- 3, +343 +/- 3, +33, +64 km s(-1)) |
en_US |
dc.description.abstract |
(4) circumstellar (CS) velocity systems (V-hel = -1020, -840, -630, -530, -300 km s(-1)) |
en_US |
dc.description.abstract |
and (%) a possible system at -53 +/- 5 km s-1 (seen only in some of the Si II lines and marginally in Fe II) of uncertain origin. The supernova remnant SNR 0057 - 7226 has a systemic velocity of +188 km s(-1), suggesting that its progenitor was a member of the NGC 346 cluster. Our data allow estimates to be made of T-e similar to 40,000 K, n(e) similar to 100 cm(-3), N(H) similar to (4-12) x 10(18) cm(-2) and a total mass between 400 and 1000 M-. for the supernova remnant (SNR) shell. We detect C I absorption lines primary in the +132 and +158 km s(-1) SMC velocity systems. As a result of the LBV-type eruptions in HD 5980, a fast-wind/slow-wind circumstellar interaction region has appeared, constituting the earliest formation stages of a windblown H II bubble surrounding this system. Variations over a timescale of 1 year in this circumstellar structure are detected. |
en_US |
dc.description.abstract |
Observations of the interstellar and circumstellar absorption components obtained with the Hubble Space Telescope Space Telescope Imaging Spectrograph (STIS) along the line of sight toward the Wolf-Rayet-luminous blue variable (LBV) system HD 5980 in the Small Magellanic Cloud are analyzed. Velocity components from C I, CI , C II, CII , C IV, NI, N V, O I, Mg II, Al II, Si II, Si II, Si III, Si IV, S II, S III, Fe II, Ni II, Be I, Cl I, and CO are identified, and column densities estimated. The principal velocity systems in our data are (1) interstellar medium (ISM) components in the Galactic disk and halo (V-hel = 1.1 +/- 3, 9 +/- 2 km s(-1)) |
en_US |
dc.language.iso |
en |
en_US |
dc.title |
Hubble Space Telescope STIS observations of the Wolf-Rayet star HD 5980 in the Small Magellanic Cloud. II. The interstellar medium components |
en_US |
dc.type |
Article |
en_US |
dc.identifier.idprometeo |
2414 |
|
dc.source.novolpages |
121(1):267-282 |
|
dc.subject.wos |
Astronomy & Astrophysics |
|
dc.description.index |
WoS: SCI, SSCI o AHCI |
|
dc.subject.keywords |
ISM : bubbles |
|
dc.subject.keywords |
stars : individual (HD 5980) |
|
dc.subject.keywords |
stars : winds, outflows |
|
dc.subject.keywords |
supernova remnants |
|
dc.relation.journal |
Astronomical Journal |
|