Spectral evolution of the He-Poor supernovae 1990U in NGC 7479 and 1991A in IC 2973

Bibcode
1994AJ....108..195G
DOI
10.1086/117058
Gomez, G.; Lopez, R.
Bibliographical reference

The Astronomical Journal, vol. 108, no. 1, p. 195-201

Advertised on:
7
1994
Number of authors
2
IAC number of authors
1
Citations
10
Refereed citations
9
Description
We present the spectral evolution, from about one to six months after optical maximum, of two type Ic supernovae, 1990U in NGC 7479 and 1991A in IC 2973 (UGC 6872). We analyze and compare the SN 1990U and SN 1991A spectral sequences. We looked for differences, at similar phases, between the more characteristic spectral features and their evolution. From this analysis, we have found that the overall spectral evolution of these two supernovae followed the same trend. The onset of their nebular phases must have occurred not later than three months after optical maximum. However, we have found some differences between these objects as derived from their spectra. We suggest that SN 1991A was a more oxygen rich and helium poor supernova than SN 1990U.
Type
Refereed
Stellar evolution
Supernovae

It may interest you

  • Refereed
    An ultra-short-period super-Earth with an extremely high density and an outer companion
    We present the discovery and characterization of a new multi-planetary system around the Sun-like star K2-360 (EPIC 201595106). K2-360 was first identified in K2 photometry as the host of an ultra-short-period (USP) planet candidate with a period of 0.88 d. We obtained follow-up transit photometry, confirming the star as the host of the signal
    Livingston, John H. et al.

    Advertised on:

    11
    2024
    Bibcode
    2024NatSR..1427219L
    Citations
    0
  • Refereed
    The Galaxy Activity, Torus, and Outflow Survey (GATOS): V. Unveiling PAH survival and resilience in the circumnuclear regions of AGNs with JWST
    This study analyses JWST MIRI/MRS observations of the infrared (IR) polycyclic aromatic hydrocarbon (PAH) bands in the nuclear (∼0.4″ at 11 μm; ∼75 pc) and circumnuclear regions (inner ∼kpc) of local active galactic nuclei (AGNs) from the Galactic Activity, Torus, and Outflow Survey (GATOS). We examine the PAH properties in the circumnuclear
    García-Bernete, I. et al.

    Advertised on:

    11
    2024
    Bibcode
    2024A&A...691A.162G
    Citations
    0
  • Refereed
    Neural calibration of imaging Stokes polarimeters
    Current polarimetric calibration techniques derive the instrument modulation matrix by numerically fitting an instrumental model to measurements of a set of calibration Stokes vectors. These techniques are typically limited to an error on the retrieved normalized Stokes Q, U and V parameters, in the $1\times10^{-2}$ to $1\times10^{-3}$ range. This
    Iglesias, F. A. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024BAAA...65..281I
    Citations
    0