- ID:
- ivo://CDS.VizieR/J/ApJ/700/331
- Title:
- Light curves of type Ia supernovae (CfA3)
- Short Name:
- J/ApJ/700/331
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present multiband photometry of 185 type-Ia supernovae (SNe Ia), with over 11500 observations. These were acquired between 2001 and 2008 at the F. L. Whipple Observatory of the Harvard-Smithsonian Center for Astrophysics (CfA). This sample contains the largest number of homogeneously observed and reduced nearby SNe Ia (z<~0.08) published to date. It more than doubles the nearby sample, bringing SN Ia cosmology to the point where systematic uncertainties dominate. Our natural system photometry has a precision of <~0.02mag in BVRIr'i' and <~0.04 mag in U for points brighter than 17.5mag. We also estimate a systematic uncertainty of 0.03mag in our SN Ia standard system BVRIr'i' photometry and 0.07mag for U. Comparisons of our standard system photometry with published SN Ia light curves and comparison stars, where available for the same SN, reveal agreement at the level of a few hundredths mag in most cases. We find that 1991bg-like SNe Ia are sufficiently distinct from other SNe Ia in their color and light-curve-shape/luminosity relation that they should be treated separately in light-curve/distance fitter training samples.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/523/A7
- Title:
- Light curves of type Ia supernovae in SNLS
- Short Name:
- J/A+A/523/A7
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present photometric properties and distance measurements of 252 high redshift Type Ia supernovae (0.15<z<1.1) discovered during the first three years of the Supernova Legacy Survey (SNLS). These events were detected and their multi-colour light curves measured using the MegaPrime/MegaCam instrument at the Canada-France-Hawaii Telescope (CFHT), by repeatedly imaging four one-square degree fields in four bands. Follow-up spectroscopy was performed at the VLT, Gemini and Keck telescopes to confirm the nature of the supernovae and to measure their redshifts.
- ID:
- ivo://CDS.VizieR/J/A+A/555/A10
- Title:
- Light curves of 5 type IIn supernovae
- Short Name:
- J/A+A/555/A10
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present optical (uBgVri) and near-infrared (YJHKs) photometry of Type IIn Supernovae 2005kj, 2006aa, 2006bo, 2006qq, 2008fq, obtained by the Carnege Supernova Project. We also report the magnitudes of the local sequence stars for each of the five supernovae.
- ID:
- ivo://CDS.VizieR/J/A+A/574/A60
- Title:
- Light curve templates of SNe Ib/c from SDSS
- Short Name:
- J/A+A/574/A60
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present optical (ugriz) light curve templates of supernovae Ib/c from the SDSS II SN survey.
- ID:
- ivo://CDS.VizieR/J/ApJ/714/1441
- Title:
- Linearity of the cosmic expansion field
- Short Name:
- J/ApJ/714/1441
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Particularly accurate relative distances are compiled and homogenized for (1) 246 Type Ia supernovae and 35 clusters with v<30000km/s, and (2) relatively nearby galaxies with 176 tip of the red-giant branch and 30 Cepheid distances. The 487 objects define a tight Hubble diagram from 300-30000km/s implying individual distance errors of <~7.5%. Here the velocities are corrected for Virgocentric steaming (locally 220km/s) and -if v_220_>3500km/s- for a 495km/s motion of the Local Supercluster toward the warm cosmic microwave background (CMB) pole at l=275, b=12; local peculiar motions are averaged out by large numbers.
- ID:
- ivo://CDS.VizieR/J/MNRAS/459/3130
- Title:
- Lists of arm and interarm supernovae
- Short Name:
- J/MNRAS/459/3130
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Using a sample of 215 supernovae (SNe), we analyse their positions relative to the spiral arms of their host galaxies, distinguishing grand-design (GD) spirals from non-GD (NGD) galaxies. We find that: (1) in GD galaxies, an offset exists between the positions of Ia and core-collapse (CC) SNe relative to the peaks of arms, while in NGD galaxies the positions show no such shifts; (2) in GD galaxies, the positions of CC SNe relative to the peaks of arms are correlated with the radial distance from the galaxy nucleus. Inside (outside) the corotation radius, CC SNe are found closer to the inner (outer) edge. No such correlation is observed for SNe in NGD galaxies nor for SNe Ia in either galaxy class; (3) in GD galaxies, SNe Ibc occur closer to the leading edges of the arms than do SNe II, while in NGD galaxies they are more concentrated towards the peaks of arms. In both samples of hosts, the distributions of SNe Ia relative to the arms have broader wings. These observations suggest that shocks in spiral arms of GD galaxies trigger star formation in the leading edges of arms affecting the distributions of CC SNe (known to have short-lived progenitors). The closer locations of SNe Ibc versus SNe II relative to the leading edges of the arms supports the belief that SNe Ibc have more massive progenitors. SNe Ia having less massive and older progenitors, have more time to drift away from the leading edge of the spiral arms.
- ID:
- ivo://CDS.VizieR/J/ApJ/707/1449
- Title:
- Local hosts of SNe Ia
- Short Name:
- J/ApJ/707/1449
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We use multi-wavelength, matched aperture, integrated photometry from the Galaxy Evolution Explorer (GALEX), the Sloan Digital Sky Survey, and the RC3 to estimate the physical properties of 166 nearby galaxies hosting 168 well-observed Type Ia supernovae (SNe Ia). The ultraviolet (UV) imaging of local SN Ia hosts from GALEX allows a direct comparison with higher-redshift hosts measured at optical wavelengths that correspond to the rest-frame UV. Our data corroborate well-known features that have been seen in other SN Ia samples. Specifically, hosts with active star formation produce brighter and slower SNe Ia on average, and hosts with luminosity-weighted ages older than 1Gyr produce on average more faint, fast, and fewer bright, slow SNe Ia than younger hosts. New results include that in our sample, the faintest and fastest SNe Ia occur only in galaxies exceeding a stellar mass threshold of ~10^10^M_{sun}_, leading us to conclude that their progenitors must arise in populations that are older and/or more metal rich than the general SN Ia population.
- ID:
- ivo://CDS.VizieR/J/ApJ/812/31
- Title:
- Local Star Formation effects on type Ia SNe
- Short Name:
- J/ApJ/812/31
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Recent studies found a correlation with ~3{sigma} significance between the local star formation measured by GALEX in SN Ia host galaxies and the distances or dispersions derived from these SNe. We search for these effects by using data from recent cosmological analyses to greatly increase the SN Ia sample; we include 179 GALEX-imaged SN Ia hosts with distances from the Joint Light-curve Analysis (JLA) and Pan-STARRS SN Ia cosmology samples and 157 GALEX-imaged SN Ia hosts with distances from the Riess et al. (2011, J/ApJ/730/119) H_0_ measurement. We find little evidence that SNe Ia in locally star-forming environments are fainter after light curve correction than SNe Ia in locally passive environments. We find a difference of 0.000+/-0.018 (stat+sys) mag for SNe fit with SALT2 and 0.029+/-0.027 (stat+sys) mag for SNe fit with MLCS2k2 (R_V_=2.5), which suggests that proposed changes to recent measurements of H_0_ and w are not significant and numerically smaller than the parameter measurement uncertainties. We measure systematic uncertainties of ~0.01-0.02mag by performing several plausible variants of our analysis. We find the greatly reduced significance of these distance modulus differences compared to Rigault et al. (2013A&A...560A..66R) results from two improvements with fairly equal effects, our larger sample size and the use of the JLA and Riess et al. sample selection criteria. Without these improvements, we recover the results of Rigault et al. We find that both populations have similar dispersions in distance than found by Rigault et al. and Kelly et al. (2015Sci...347.1459K), with slightly smaller dispersions for locally passive (log({Sigma}_SFR_)<-2.9dex) SNe Ia fit with MLCS, the opposite of the effect seen by Rigault et al. and Kelly et al. We caution that measuring the local environments of SNe Ia in the future may require a higher resolution instrument than GALEX and that SN Ia sample selection has a significant effect on local star formation biases.
- ID:
- ivo://CDS.VizieR/J/MNRAS/461/3296
- Title:
- Long-term core-collapse supernova simulations
- Short Name:
- J/MNRAS/461/3296
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The next Galactic supernova is expected to bring great opportunities for the direct detection of gravitational waves (GW), full flavour neutrinos, and multiwavelength photons. To maximize the science return from such a rare event, it is essential to have established classes of possible situations and preparations for appropriate observations. To this end, we use a long-term numerical simulation of the core-collapse supernova (CCSN) of a 17M_{sun}_ red supergiant progenitor to self-consistently model the multimessenger signals expected in GW, neutrino, and electromagnetic messengers. This supernova model takes into account the formation and evolution of a protoneutron star, neutrino-matter interaction, and neutrino transport, all within a two-dimensional shock hydrodynamics simulation. With this, we separately discuss three situations: (i) a CCSN at the Galactic Center, (ii) an extremely nearby CCSN within hundreds of parsecs, and (iii) a CCSN in nearby galaxies within several Mpc. These distance regimes necessitate different strategies for synergistic observations. In a Galactic CCSN, neutrinos provide strategic timing and pointing information. We explore how these in turn deliver an improvement in the sensitivity of GW analyses and help to guarantee observations of early electromagnetic signals. To facilitate the detection of multimessenger signals of CCSNe in extremely nearby and extragalactic distances, we compile a list of nearby red supergiant candidates and a list of nearby galaxies with their expected CCSN rates. By exploring the sequential multimessenger signals of a nearby CCSN, we discuss preparations for maximizing successful studies of such an unprecedented stirring event.
- ID:
- ivo://CDS.VizieR/J/AJ/139/120
- Title:
- Low-redshift Type-Ia supernovae
- Short Name:
- J/AJ/139/120
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- An analysis of the first set of low-redshift (z<0.08) Type Ia supernovae (SNe Ia) monitored by the Carnegie Supernova Project between 2004 and 2006 is presented. The data consist of well-sampled, high-precision optical (ugriBV) and near-infrared (NIR; YJHKs) light curves in a well-understood photometric system.
