Observed Type II supernova colours from the Carnegie Supernova Project-I
We present a study of observed Type II supernova (SN II) colours using optical/near-infrared photometric data from the <i>Carnegie Supernovae Project-I</i>. We analyse four colours (B−V, u−g, g−r, and g−Y) and find that SN II colour curves can be described by two linear regimes during th...
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , |
|---|---|
| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2018
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/93924 https://academic.oup.com/mnras/article-abstract/476/4/4592/4907983 https://ri.conicet.gov.ar/handle/11336/82472 |
| Aporte de: |
| id |
I19-R120-10915-93924 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Astronomía stars: supernovae: general ISM: dust, extinction |
| spellingShingle |
Astronomía stars: supernovae: general ISM: dust, extinction Jaeger, T. de Anderson, J. P. Galbany, L. González Gaitán, S. Hamuy, M. Phillips, M. M. Stritzinger, M. D. Contreras, C. Folatelli, Gastón Gutiérrez, C. P. Hsiao, E. Y. Morrell, Nidia Irene Suntzeff, N. B. Dessart, L. Filippenko, A. V. Observed Type II supernova colours from the Carnegie Supernova Project-I |
| topic_facet |
Astronomía stars: supernovae: general ISM: dust, extinction |
| description |
We present a study of observed Type II supernova (SN II) colours using optical/near-infrared photometric data from the <i>Carnegie Supernovae Project-I</i>. We analyse four colours (B−V, u−g, g−r, and g−Y) and find that SN II colour curves can be described by two linear regimes during the photospheric phase. The first (s<sub>1,colour</sub>) is steeper and has a median duration of ∼ 40 days. The second, shallower slope (s<sub>2,colour</sub>) lasts until the end of the “plateau” (∼ 80 days). The two slopes correlate in the sense that steeper initial colour curves also imply steeper colour curves at later phases. As suggested by recent studies, SNe II form a continuous population of objects from the colour point of view as well. We investigate correlations between the observed colours and a range of photometric and spectroscopic parameters including the absolute magnitude, the V-band light-curve slopes, and metal-line strengths. We find that less luminous SNe II appear redder, a trend that we argue is not driven by uncorrected host-galaxy reddening. While there is significant dispersion, we find evidence that redder SNe II (mainly at early epochs) display stronger metal-line equivalent widths. Host-galaxy reddening does not appear to be a dominant parameter, neither driving observed trends nor dominating the dispersion in observed colours. Intrinsic SN II colours are most probably dominated by photospheric temperature differences, with progenitor metallicity possibly playing a minor role. Such temperature differences could be related to differences in progenitor radius, together with the presence or absence of circumstellar material close to the progenitor stars. |
| format |
Articulo Preprint |
| author |
Jaeger, T. de Anderson, J. P. Galbany, L. González Gaitán, S. Hamuy, M. Phillips, M. M. Stritzinger, M. D. Contreras, C. Folatelli, Gastón Gutiérrez, C. P. Hsiao, E. Y. Morrell, Nidia Irene Suntzeff, N. B. Dessart, L. Filippenko, A. V. |
| author_facet |
Jaeger, T. de Anderson, J. P. Galbany, L. González Gaitán, S. Hamuy, M. Phillips, M. M. Stritzinger, M. D. Contreras, C. Folatelli, Gastón Gutiérrez, C. P. Hsiao, E. Y. Morrell, Nidia Irene Suntzeff, N. B. Dessart, L. Filippenko, A. V. |
| author_sort |
Jaeger, T. de |
| title |
Observed Type II supernova colours from the Carnegie Supernova Project-I |
| title_short |
Observed Type II supernova colours from the Carnegie Supernova Project-I |
| title_full |
Observed Type II supernova colours from the Carnegie Supernova Project-I |
| title_fullStr |
Observed Type II supernova colours from the Carnegie Supernova Project-I |
| title_full_unstemmed |
Observed Type II supernova colours from the Carnegie Supernova Project-I |
| title_sort |
observed type ii supernova colours from the carnegie supernova project-i |
| publishDate |
2018 |
| url |
http://sedici.unlp.edu.ar/handle/10915/93924 https://academic.oup.com/mnras/article-abstract/476/4/4592/4907983 https://ri.conicet.gov.ar/handle/11336/82472 |
| work_keys_str_mv |
AT jaegertde observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT andersonjp observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT galbanyl observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT gonzalezgaitans observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT hamuym observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT phillipsmm observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT stritzingermd observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT contrerasc observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT folatelligaston observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT gutierrezcp observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT hsiaoey observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT morrellnidiairene observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT suntzeffnb observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT dessartl observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti AT filippenkoav observedtypeiisupernovacoloursfromthecarnegiesupernovaprojecti |
| bdutipo_str |
Repositorios |
| _version_ |
1764820491973951489 |