Skip navigation
  • INAF logo
  • Home
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects
  • Explore by
    • Research outputs
    • Researchers
    • Organization units
    • Projects
  • Login:
    • My DSpace
    • Receive email
      updates
    • Edit Account details
  • Italian
  • English

  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29335
Title: Strongly Bipolar Inner Ejecta of the Normal Type IIP Supernova ASASSN-16at
Authors: Bose, Subhash
Dong, Subo
ELIAS DE LA ROSA, NANCY DEL CARMEN 
Shappee, B. J.
Bersier, David
BENETTI, Stefano 
Stritzinger, M. D.
Grupe, D.
Kochanek, C. S.
Prieto, J. L.
Chen, Ping
Kuncarayakti, H.
Mattila, Seppo
Morales-Garoffolo, Antonia
Morrell, Nidia
Onori, F.
Reynolds, Thomas M.
Siviero, A.
Somero, Auni
Stanek, K. Z.
Terreran, Giacomo
Thompson, Todd A.
TOMASELLA, Lina 
Ashall, C.
Gall, Christa
Gromadzki, M.
Holoien, T. W. -S.
Issue Date: 2019
Journal: THE ASTROPHYSICAL JOURNAL LETTERS 
Number: 873
Issue: 1
First Page: L3
Abstract: We report distinctly double-peaked Hα and Hβ emission lines in the late-time, nebular-phase spectra (≳200 days) of the otherwise normal at early phases (≲100 days) type IIP supernova ASASSN-16at (SN 2016X). Such distinctly double-peaked nebular Balmer lines have never been observed for a type II SN. The nebular-phase Balmer emission is driven by the radioactive <SUP>56</SUP>Co decay, so the observed line profile bifurcation suggests a strong bipolarity in the <SUP>56</SUP>Ni distribution or in the line-forming region of the inner ejecta. The strongly bifurcated blueshifted and redshifted peaks are separated by ∼3 × 10<SUP>3</SUP> km s<SUP>-1</SUP> and are roughly symmetrically positioned with respect to the host-galaxy rest frame, implying that the inner ejecta are composed of two almost-detached blobs. The red peak progressively weakens relative to the blue peak, and disappears in the 740 days spectrum. One possible reason for the line-ratio evolution is increasing differential extinction from continuous formation of dust within the envelope, which is also supported by the near-infrared flux excess that develops after ∼100 days.
URI: http://hdl.handle.net/20.500.12386/29335
URL: https://iopscience.iop.org/article/10.3847/2041-8213/ab0558
ISSN: 2041-8205
DOI: 10.3847/2041-8213/ab0558
Bibcode ADS: 2019ApJ...873L...3B
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

Files in This Item:
File Description SizeFormat 
2019ApJ...873L...3B_journal.pdfpdf editoriale1.99 MBAdobe PDFView/Open
2019ApJ...873L...3B_postprint.pdfpreprint1.01 MBAdobe PDFView/Open
Show full item record

Page view(s)

5
checked on Jan 22, 2021

Download(s)

3
checked on Jan 22, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are published in Open Access, unless otherwise indicated.


Explore by
  • Communities
    & Collections
  • Research outputs
  • Researchers
  • Organization units
  • Projects

Informazioni e guide per autori

https://openaccess-info.inaf.it: tutte le informazioni sull'accesso aperto in INAF

Come si inserisce un prodotto: le guide a OA@INAF

La Policy INAF sull'accesso aperto

Documenti e modelli scaricabili

Feedback
Built with DSpace-CRIS - Extension maintained and optimized by Logo 4SCIENCE