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- ID:
- ivo://CDS.VizieR/J/ApJ/760/L33
- Title:
- Photometry of the Ic supernova PTF12gzk
- Short Name:
- J/ApJ/760/L33
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the discovery and extensive early-time observations of the Type Ic supernova (SN) PTF12gzk. Our light curves show a rise of 0.8mag within 2.5hr. Power-law fits (f(t){prop.to}(t-t_0_)^n^) to these data constrain the explosion date to within one day. We cannot rule out a quadratic fireball model, but higher values of n are possible as well for larger areas in the fit parameter space. Our bolometric light curve and a dense spectral sequence are used to estimate the physical parameters of the exploding star and of the explosion. We show that the photometric evolution of PTF12gzk is slower than that of most SNe Ic. The high ejecta expansion velocities we measure (~30000km/s derived from line minima four days after explosion) are similar to the observed velocities of broad-lined SNe Ic associated with gamma-ray bursts (GRBs) rather than to normal SN Ic velocities. Yet, this SN does not show the persistent broad lines that are typical of broad-lined SNe Ic. The host-galaxy characteristics are also consistent with GRB-SN hosts, and not with normal SN Ic hosts. By comparison with the spectroscopically similar SN 2004aw, we suggest that the observed properties of PTF12gzk indicate an initial progenitor mass of 25-35M_{sun}_ and a large ((5-10)x10^51^erg) kinetic energy, the later being close to the regime of GRB-SN properties.
- ID:
- ivo://CDS.VizieR/J/ApJ/821/57
- Title:
- Photometry of the Type Ib/c SN2013ge
- Short Name:
- J/ApJ/821/57
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present extensive multiwavelength (radio to X-ray) observations of the Type Ib/c supernova (SN Ib/c) SN 2013ge from -13 to +457 days relative to maximum light, including a series of optical spectra and Swift UV-optical photometry beginning 2-4 days post-explosion. This data set makes SN 2013ge one of the best-observed normal SNe Ib/c at early times - when the light curve is particularly sensitive to the progenitor configuration and mixing of radioactive elements - and reveals two distinct light curve components in the UV bands.
- ID:
- ivo://CDS.VizieR/J/ApJ/729/143
- Title:
- Photometry of type IIn SN 2008am
- Short Name:
- J/ApJ/729/143
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present observations and interpretation of the Type IIn supernova SN 2008am discovered by the ROTSE Supernova Verification Project (RSVP). SN 2008am peaked at approximately -22.3mag at a redshift of z=0.2338, giving it a peak luminosity of ~3x10^44^erg/s and making it one of the most luminous supernovae ever observed. The host galaxy appears to be an SB1 of normal luminosity (M_r'_~-20) with metallicity Z~0.4Z_{sun}_. ROTSE upper limits and detections constrain the rise time to be ~34 days in the rest frame, significantly shorter than similar events, SN 2006gy and SN 2006tf. Photometric observations in the ultraviolet, optical, and infrared bands (J, H, Ks) constrain the spectral energy distribution evolution. We obtained six optical spectra of the supernova, five on the early decline from maximum light and a sixth nearly a year later plus a very late time spectrum (~2yr) of the host galaxy. The spectra of SN 2008am show strong Balmer-line and HeI5876 emission with intermediate widths (~25{AA}) in the first ~40 days after optical maximum.
- ID:
- ivo://CDS.VizieR/J/ApJ/756/173
- Title:
- Photometry of type IIn SNe 2005ip and 2006jd
- Short Name:
- J/ApJ/756/173
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present an observational study of the Type IIn supernovae (SNe IIn) 2005ip and 2006jd. Broadband UV, optical, and near-IR photometry, and visual-wavelength spectroscopy of SN 2005ip complement and extend upon published observations to 6.5 years past discovery. Our observations of SN 2006jd extend from UV to mid-infrared wavelengths, and like SN 2005ip, are compared to reported X-ray measurements to understand the nature of the progenitor. Both objects display a number of similarities with the 1988Z-like subclass of SN IIn including (1) remarkably similar early- and late-phase optical spectra, (2) a variety of high-ionization coronal lines, (3) long-duration optical and near-IR emission, and (4) evidence of cold and warm dust components. However, diversity is apparent, including an unprecedented late-time r-band excess in SN 2006jd. The observed differences are attributed to differences between the mass-loss history of the progenitor stars. We conclude that the progenitor of SN 2006jd likely experienced a significant mass-loss event during its pre-SN evolution akin to the great 19th century eruption of {eta} Carinae. Contrarily, as advocated by Smith et al., the circumstellar environment of SN 2005ip is found to be more consistent with a clumpy wind progenitor.
- ID:
- ivo://CDS.VizieR/J/ApJ/627/579
- Title:
- Photometry of variables in NGC 3370
- Short Name:
- J/ApJ/627/579
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report observations of two nearby Type Ia supernovae (SNe Ia) for which observations of Cepheid variables in the host galaxies have been obtained with the Hubble Space Telescope: SN 1994ae in NGC 3370 and SN 1998aq in NGC 3982. For NCG 3370, we used the Advanced Camera for Surveys to observe 64 Cepheids that yield a distance of 29 Mpc, the farthest direct measurement of Cepheids.
- ID:
- ivo://CDS.VizieR/J/ApJ/855/107
- Title:
- PMAS Integral-field SN hosts COmpilation (PISCO)
- Short Name:
- J/ApJ/855/107
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the PMAS/PPak Integral-field Supernova hosts COmpilation (PISCO), which comprises integral field spectroscopy (IFS) of 232 supernova (SN) host galaxies that hosted 272 SNe, observed over several semesters with the 3.5m telescope at the Calar Alto Observatory (CAHA). PISCO is the largest collection of SN host galaxies observed with wide-field IFS, totaling 466347 individual spectra covering a typical spatial resolution of ~380pc. Focused studies regarding specific SN Ia-related topics will be published elsewhere; this paper aims to present the properties of the SN environments, using stellar population (SP) synthesis, and the gas-phase interstellar medium, providing additional results separating stripped-envelope SNe into their subtypes. With 11270 HII regions detected in all galaxies, we present for the first time a statistical analysis of HII regions, which puts HII regions that have hosted SNe in context with all other star-forming clumps within their galaxies. SNe Ic are associated with environments that are more metal-rich and have higher EW(H{alpha}) and higher star formation rate within their host galaxies than the mean of all HII regions detected within each host. This in contrast to SNe IIb, which occur in environments that are very different compared to other core-collapse SNe types. We find two clear components of young and old SPs at SNe IIn locations. We find that SNe II fast decliners tend to explode at locations where the {Sigma}SFR is more intense. Finally, we outline how a future dedicated IFS survey of galaxies in parallel to an untargeted SN search would overcome the biases in current environmental studies.
- ID:
- ivo://CDS.VizieR/J/other/Ser/189.15
- Title:
- Point source catalogue of M31. DR2
- Short Name:
- J/other/Ser/189.
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present Data Release 2 of the Point Source Catalogue created from a series of previously constructed radio-continuum images of M31 at lambda=20cm (nu=1.4GHz) from archived VLA observations. In total, we identify a collection of 916 unique discrete radio sources across the field of M31. Comparing these detected sources to those listed by Gelfand et al. (<A HREF="http://simbad.cds.unistra.fr/simbad/sim-ref?bibcode=2004ApJS..155...89G%202004ApJS..155...89G">2004ApJS..155...89G 2004ApJS..155...89G</A>, Cat. <A HREF="http://cdsarc.u-strasbg.fr/cgi-bin/Cat?J/ApJS/155/89">J/ApJS/155/89</A>) at lambda=92cm, the spectral index of 98 sources has been derived. The majority (73%) of these sources exhibit a spectral index of α←0.6, indicating that their emission is predominantly non-thermal in nature, which is typical for background objects and Supernova Remnants (SNRs).
- ID:
- ivo://CDS.VizieR/J/ApJ/745/74
- Title:
- Pre-maximum spectra of type Ia SNe
- Short Name:
- J/ApJ/745/74
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The presence of unburned material in the ejecta of normal Type Ia supernovae (SNe Ia) is investigated using early-time spectroscopy obtained by the Carnegie Supernova Project. The tell-tale signature of pristine material from a C+O white dwarf progenitor star is the presence of carbon, as oxygen is also a product of carbon burning. The most prominent carbon lines in optical spectra of SNe Ia are expected to arise from CII. We find that at least 30% of the objects in the sample show an absorption at {approx}6300{AA} which is attributed to CII{lambda}6580. An alternative identification of this absorption as H{alpha} is considered to be unlikely. These findings imply a larger incidence of carbon in SNe Ia ejecta than previously noted.
- ID:
- ivo://CDS.VizieR/J/ApJS/199/38
- Title:
- Presupernova evolution
- Short Name:
- J/ApJS/199/38
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a new set of zero metallicity models in the range 13-80M_{sun}_ together to the associated explosive nucleosynthesis. These models are fully homogeneous with the solar metallicity set we published in Limongi & Chieffi (2006ApJ...647..483L) and will be freely available at the Online Repository for the FRANEC Evolutionary Output (ORFEO) Web site. A comparison between these yields and an average star that represents the average behavior of most of the very metal-poor stars in the range -5.0<[Fe/H]<-2.5 confirms previous findings that only a fraction of the elemental [X/Fe] may be fitted by the ejecta of standard core collapse supernovae.
