S. Taubenberger
A5000032006- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Non-Destructive Testing Techniques
- Neutrino Physics Research
- Nuclear Physics and Applications
- Advanced Power Generation Technologies
- Superconducting Materials and Applications
- Astrophysics and Star Formation Studies
- Electrical Fault Detection and Protection
- Adaptive optics and wavefront sensing
- Nuclear physics research studies
- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Cosmology and Gravitation Theories
- Calibration and Measurement Techniques
- Solar and Space Plasma Dynamics
- Medical Imaging and Pathology Studies
- Engineering Applied Research
Max Planck Institute for Astrophysics
2014-2023
Technical University of Munich
2023
European Southern Observatory
2015-2020
Max Planck Institute for Extraterrestrial Physics
2020
Max Planck Society
2008-2019
Osservatorio Astronomico di Padova
2007-2008
National Institute for Astrophysics
2008
The University of Tokyo
2008
Tokyo University of Science
2008
Queen's University Belfast
2007-2008
We present a measurement of the Hubble constant ($H_{0}$) and other cosmological parameters from joint analysis six gravitationally lensed quasars with measured time delays. All lenses except first are analyzed blindly respect to parameters. In flat $\Lambda$CDM cosmology, we find $H_{0} = 73.3_{-1.8}^{+1.7}$, 2.4% precision measurement, in agreement local measurements $H_{0}$ type Ia supernovae calibrated by distance ladder, but $3.1\sigma$ tension $Planck$ observations cosmic microwave...
We present results for a suite of 14 three-dimensional, high-resolution hydrodynamical simulations delayed-detonation models Type Ia supernova (SN Ia) explosions. This model comprises the first set three-dimensional SN with detailed isotopic yield information. As such, it may serve as data base Chandrasekhar-mass nucleosynthetic yields and deriving synthetic observables such spectra light curves. employ physically motivated, stochastic based on turbulent velocity fluctuations fuel density to...
One of the most important questions regarding progenitor systems Type Ia supernovae (SNe Ia) is whether mergers two white dwarfs can lead to explosions that reproduce observations normal events. Here we present a fully three-dimensional simulation violent merger carbon-oxygen with masses $0.9 \mathrm{M_\odot}$ and $1.1 combining very high resolution exact initial conditions. A well-tested combination codes used study system. We start dynamical inspiral phase follow subsequent thermonuclear...
We report extensive observational data for five of the lowest redshift Super-Luminous Type Ic Supernovae (SL-SNe Ic) discovered to date, namely PTF10hgi, SN2011ke, PTF11rks, SN2011kf and SN2012il. Photometric imaging transients at +50 +230 days after peak combined with host galaxy subtraction reveals a luminous tail phase four these SL-SNe. A high resolution, optical near infrared spectrum from xshooter provides detection broad He I $\lambda$10830 emission line in (+50d) SN2012il, revealing...
We report the results of a three-year-long dedicated monitoring campaign restless luminous blue variable (LBV) in NGC 7259. The object, named SN 2009ip, was observed photometrically and spectroscopically optical near-infrared domains. monitored number erupting episodes past few years, increased density our observations during eruptive episodes. In this paper, we present full historical data set from 2009 to 2012 with multi-wavelength dense coverage two high-luminosity events between August...
The Public European Southern Observatory Spectroscopic Survey of Transient Objects (PESSTO) began as a public spectroscopic survey in April 2012. We describe the data reduction strategy and products which are publicly available through ESO archive Data Release 1 (SSDR1). PESSTO uses New Technology Telescope with EFOSC2 SOFI to provide optical NIR spectroscopy imaging. target supernovae transients brighter than 20.5mag for classification. Science targets then selected follow-up based on...
As part of an on-going effort to identify, understand and correct for astrophysics biases in the standardization Type Ia supernovae (SNIa) cosmology, we have statistically classified a large sample nearby SNeIa into those located predominantly younger or older environments. This classification is based on specific star formation rate measured within projected distance 1kpc from each SN location (LsSFR). important refinement compared using local directly as it provides normalization relative...
The only supernovae (SNe) to show gamma-ray bursts (GRBs) or early x-ray emission thus far are overenergetic, broad-lined type Ic SNe (hypernovae, HNe). Recently, SN 2008D has shown several unusual features: (i) weak flash (XRF), (ii) an early, narrow optical peak, (iii) disappearance of the broad lines typical HNe, and (iv) development helium as in Ib. Detailed analysis shows that was not a normal supernova: Its explosion energy (E approximately 6x10(51) erg) ejected mass [ 7 times Sun...
Core-collapse supernovae (CC-SNe) are the explosions that announce death of massive stars. Some CC-SNe linked to long-duration gamma-ray bursts (GRBs) and highly aspherical. One important question is what extent asphericity common all CC-SNe. Here we present late-time spectra for a number from stripped-envelope stars use them explore any generated in inner part exploding star, near site collapse. A range oxygen emission-line profiles observed, including high incidence double-peaked profiles,...
We present the results of one-year long observational campaign type II plateau SN 2005cs, which exploded in nearby spiral galaxy M51 (the Whirlpool galaxy). This extensive data set makes 2005cs best observed low-luminosity, 56Ni-poor event so far and one core-collapse supernovae ever. The optical near-infrared spectra show narrow P-Cygni lines characteristic this family, are indicative a very low expansion velocity (about 1000 km s−1) ejected material. light curves cover both phase late-time...
The nearby supernova SN 2011fe can be observed in unprecedented detail. Therefore, it is an important test case for Type Ia (SN Ia) models, which may bring us closer to understanding the physical nature of these objects. Here, we explore how available and expected future observations used constrain explosion scenarios. We base our discussion on three-dimensional simulations a delayed detonation Chandrasekhar-mass white dwarf violent merger two dwarfs-realizations models appropriate most...
We present 32 epochs of optical (3300-9700 \AA) spectrophotometric observations the nearby quintessential "normal" type Ia supernova (SN Ia) SN 2011fe in galaxy M101, extending from -15 to +97 d with respect B-band maximum, obtained by Nearby Supernova Factory collaboration. is closest (\mu = 29.04) and brightest (Bmax 9.94 mag) observed since advent modern large scale programs for intensive periodic followup supernovae. Both synthetic light curve measurements spectral feature analysis...
2002cx-like supernovae are a sub-class of sub-luminous Type Ia (SNe). Their light curves and spectra characterized by distinct features that indicate strong mixing the explosion ejecta. Pure turbulent deflagrations have been shown to produce such mixed Here, we present hydrodynamics, nucleosynthesis radiative-transfer calculations for 3D full-star deflagration Chandrasekhar-mass white dwarf. Our model is able reproduce characteristic observational SN 2005hk (a prototypical supernova), not...
H and He features in photospheric spectra have seldom been used to infer quantitatively the properties of Type IIb, Ib Ic supernovae (SNe Ic) their progenitor stars. Most radiative transfer models ignored NLTE effects, which are extremely strong especially He-dominated zones. In this paper, a comprehensive set model atmospheres for low-mass SNe IIb/Ib/Ic is presented. Long-standing questions such as how much can be contained Ic, where lines not seen, thus addressed. The state computed full...
We present new spectroscopic and photometric data of the type Ibn supernovae 2006jc, 2000er 2002ao. discuss general properties this recently proposed supernova family, which also includes SN 1999cq. The early-time monitoring traces evolution class objects during first few days after shock breakout. An overall similarity in is found among members group, would be unexpected if energy these core-collapse events was dominated by interaction between ejecta circumstellar medium. Type appear to...
The progenitors of Type Ia Supernovae (SNe Ia) are still unknown, despite significant progress during the last years in theory and observations. Violent mergers two carbon--oxygen (CO) white dwarfs (WDs) one candidate suggested to be responsible for at least a fraction normal SNe Ia. Here, we simulate merger CO WDs using moving-mesh code that allows inclusion thin helium (He) shells (0.01\,\msun) on top WDs, an unprecedented numerical resolution. accretion He onto primary WD leads formation...
We present new data for five under-luminous type II-plateau supernovae (SNe IIP), namely SN 1999gn, 2002gd, 2003Z, 2004eg and 2006ov. This sample of low-luminosity SNe IIP (LL IIP) is analyzed together with similar objects studied in the past. All them show a flat light curve plateau lasting about 100 days, an under luminous late-time exponential tail, intrinsic colours that are unusually red, spectra showing prominent narrow P-Cygni lines. A velocity ejected material below 10^3 km/s...
We present comprehensive photometric and spectroscopic observations of the faint transient SN 2008S discovered in NGC 6946. exhibited slow evolution almost no spectral variability during first nine months, implying a high density CS medium. The light curve is similar shape to that 1998S 1979C, although significantly fainter at maximum light. Our quasi-bolometric lightcurve extends 300 days shows tail phase decay rate consistent with ^{56}Co. propose this evidence for an explosion formation...
Extended optical and near-IR observations reveal that SN 2009dc shares a number of similarities with normal Type Ia supernovae (SNe Ia), but is clearly overluminous, (pseudo-bolometric) peak luminosity log (L) = 43.47 (erg s−1). Its light curves decline slowly over half year after maximum [Δm15(B)true= 0.71], the early-time show secondary maxima, although minima between first second peaks are not very pronounced. The bluer bands exhibit an enhanced fading ∼200 d, which might be caused by...
We present optical and near-infrared (NIR) photometry spectroscopy of the Type IIb supernova (SN) 2011dh for first 100 days. complement our extensive dataset with SWIFT ultra-violet (UV) Spitzer mid-infrared (MIR) data to build a UV MIR bolometric lightcurve using both photometric spectroscopic data. Hydrodynamical modelling SN based on this have been presented in Bersten (2012). find that absorption minimum hydrogen lines is never seen below ~11000 km/s but approaches value as get weaker....
We investigate the brightness distribution expected for thermonuclear explosions that might result from ignition of a detonation during violent merger white dwarf (WD) binaries. Violent WD mergers are subclass canonical double degenerate scenario where two carbon–oxygen (CO) WDs merge when larger fills its Roche lobe. Determining their is critical evaluating whether such an explosion model could be responsible significant fraction observed population Type Ia supernovae (SNe Ia). argue...