Comparative Direct Analysis of Type Ia Supernova Spectra. IV. Postmaximum

Autor: David Branch, David J. Jeffery, Melissa Keithley, Vallery Stanishev, Christopher Bruner, Joshua Harrison, Jerod T. Parrent, Michael Troxel, E. Baron

Publikováno v: Publications of the Astronomical Society of the Pacific. 120:135-149

A comparative study of optical spectra of Type Ia supernovae (SNe Ia) obtained near 1 week, 3 weeks, and 3 months after maximum light is presented. Most members of the four groups that were defined on the basis of maximum light spectra in Paper II (c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4382e9cbcbe6d41342d3b0a7529c2127
https://doi.org/10.1086/527572

Comparative Direct Analysis of Type Ia Supernova Spectra. III. Premaximum

Autor: David Branch, Darrin Casebeer, Wesley Ketchum, E. Baron, Leann Chau Dang, Nicholas Hall, Jerod Parrent, Miriam Musco, David J. Jeffery, Kazuhito Hatano, Michael Troxel

Publikováno v: Publications of the Astronomical Society of the Pacific. 119:709-721

A comparative study of spectra of 21 Type Ia supernovae (SNe Ia) obtained about one week before maximum light, and 8 spectra obtained 11 or more days before maximum, is presented. To a large extent the premaximum spectra exhibit the defining characte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1eddceb114b8423937daf78b04381587
https://doi.org/10.1086/520553

Hydrogen in Type Ic Supernovae?

Autor: Timothy R. Young, David Branch, E. Baron, David J. Jeffery

Publikováno v: Publications of the Astronomical Society of the Pacific. 118:791-796

By definition, a Type Ic supernova (SN Ic) does not have conspicuous lines of hydrogen or helium in its optical spectrum. SNe Ic usually are modelled in terms of the gravitational collapse of bare carbon-oxygen cores. We consider the possibility that

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5acf3faf5476abedd2c619938d7a9d51
https://doi.org/10.1086/505548

A Complete Analytic Inversion of Supernova Lines in the Sobolev Approximation

Autor: David J. Jeffery, Daniel Kasen, E. Baron, David Branch

Publikováno v: Kasen, Daniel; Branch, David; Baron, E.; & Jeffery, David. (2001). A complete analytic inversion of supernova lines in the Sobolev approximation. Lawrence Berkeley National Laboratory. Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://www.escholarship.org/uc/item/0138s21m

We show that the shape of P-Cygni line profiles of photospheric phase supernova can be analytically inverted to extract both the optical depth and source function of the line -- i.e. all the physical content of the model for the case when the Sobolev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::547c904e5255738d384254b0c92fd5ae
https://doi.org/10.1086/324136

Nebular Spectra of the Unusual Type I[CLC]a[/CLC] Supernova 1991T

Autor: Weihong Liu, David J. Jeffery, David R. Schultz

Publikováno v: The Astrophysical Journal. 486:L35-L38

The nebular optical spectra of the unusual Type Ia supernova 1991T are modeled by treating important atomic processes with reliable atomic data and by assuming both Chandrasekhar-mass and sub-Chandrasekhar-mass white dwarf explosion models. Similar t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aa588f59719bc29dd221e0f4b5add8d5
https://doi.org/10.1086/310832