Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/31387
Titolo: | The Evolution of Disk Winds from a Combined Study of Optical and Infrared Forbidden Lines | Autori: | Pascucci, Ilaria Banzatti, Andrea Gorti, Uma Fang, Min Pontoppidan, Klaus Alexander, Richard Ballabio, Giulia Edwards, Suzan Salyk, Colette SACCO, GIUSEPPE GERMANO FLACCOMIO, Ettore Blake, Geoffrey A. Carmona, Andres Hall, Cassandra Kamp, Inga Käufl, Hans Ulrich Meeus, Gwendolyn Meyer, Michael Pauly, Tyler Steendam, Simon Sterzik, Michael |
Data pubblicazione: | 2020 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 903 | Fascicolo: | 2 | Da pagina:: | 78 | Abstract: | We analyze high-resolution (Δv ≤ 10 km s<SUP>-1</SUP>) optical and infrared spectra covering the [O I] λ6300 and [Ne II] 12.81 μm lines from a sample of 31 disks in different evolutionary stages. Following work at optical wavelengths, we use Gaussian profiles to fit the [Ne II] lines and classify them into high-velocity component (HVC) or low-velocity component (LVC) if the line centroid is more or less blueshifted than 30 km s<SUP>-1</SUP> with respect to the stellar radial velocity, respectively. Unlike for the [O I], where an HVC is often accompanied by an LVC, all 17 sources with an [Ne II] detection have either an HVC or an LVC. [Ne II] HVCs are preferentially detected toward high accretors ( ${\dot{M}}_{\mathrm{acc}}\gt {10}^{-8}$ M<SUB>⊙</SUB> yr<SUP>-1</SUP>), while LVCs are found in sources with low ${\dot{M}}_{\mathrm{acc}}$ , low [O I] luminosity, and large infrared spectral index (n<SUB>13-31</SUB>). Interestingly, the [Ne II] and [O I] LVC luminosities display an opposite behavior with n<SUB>13-31</SUB>: as the inner dust disk depletes (higher n<SUB>13-31</SUB>), the [Ne II] luminosity increases while the [O I] weakens. The [Ne II] and [O I] HVC profiles are generally similar, with centroids and FWHMs showing the expected behavior from shocked gas in microjets. In contrast, the [Ne II] LVC profiles are typically more blueshifted and narrower than the [O I] profiles. The FWHM and centroid versus disk inclination suggest that the [Ne II] LVC predominantly traces unbound gas from a slow, wide-angle wind that has not lost completely the Keplerian signature from its launching region. We sketch an evolutionary scenario that could explain the combined [O I] and [Ne II] results and includes screening of hard (∼1 keV) X-rays in inner, mostly molecular, MHD winds. | URI: | http://hdl.handle.net/20.500.12386/31387 | URL: | https://api.elsevier.com/content/abstract/scopus_id/85096062506 https://iopscience.iop.org/article/10.3847/1538-4357/abba3c |
ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/abba3c | Bibcode ADS: | 2020ApJ...903...78P | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
2009.09114.pdf | preprint | 1.32 MB | Adobe PDF | Visualizza/apri |
Pascucci_2020_ApJ_903_78.pdf | [Administrators only] | 1.95 MB | Adobe PDF |
Page view(s)
30
controllato il 23-apr-2024
Download(s)
13
controllato il 23-apr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.