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Can Helium-detonation Model Explain the Observed Diversity of Type Ia Supernovae?
Wenxiong Li, Xiaofeng Wang, Mattia Bulla +13
We study a sample of 16 Type Ia supernovae (SNe Ia) having both spectroscopic and photometric observations within 2 3 days after the first light. The early colors of such…
Optimizing Serendipitous Detections of Kilonovae: Cadence and Filter Selection
Mouza Almualla, Shreya Anand, Michael W. Coughlin +9
The rise of multi-messenger astronomy has brought with it the need to exploit all available data streams and learn more about the astrophysical objects that fall within its breadth…
Comparing inclination dependent analyses of kilonova transients
J. Heinzel, M. W. Coughlin, T. Dietrich +7
The detection of AT2017gfo proved that binary neutron star mergers are progenitors of kilonovae. Using a combination of numerical-relativity and radiative-transfer simulations, the…
Can jets make the radioactively powered emission from neutron star mergers bluer?
Lorenzo Nativi, Mattia Bulla, Stephan Rosswog +5
Neutron star mergers eject neutron-rich matter in which heavy elements are synthesised. The decay of these freshly synthesised elements powers electromagnetic transients ("macronov…
Explaining muon anomaly in a non-universal extended SUSY theory
J. S. Alvarado, M. A. Bulla, D. G. Martinez +1
A non-universal extension to the Standard Model composed of two scalar doublets and two scalar singlets together with three additional quark singlets and two lepton sing…
Optical follow-up of the neutron star-black hole mergers S200105ae and S200115j
Shreya Anand, Michael W. Coughlin, Mansi M. Kasliwal +46
LIGO and Virgo's third observing run (O3) revealed the first neutron star-black hole (NSBH) merger candidates in gravitational waves. These events are predicted to synthesize r-pro…
Polarized kilonovae from black hole-neutron star mergers
M. Bulla, K. Kyutoku, M. Tanaka +6
We predict linear polarization for a radioactively-powered kilonova following the merger of a black hole and a neutron star. Specifically, we perform 3-D Monte Carlo radiative tran…
Measuring the Hubble Constant with a sample of kilonovae
Michael W. Coughlin, Sarah Antier, Tim Dietrich +7
Kilonovae produced by the coalescence of compact binaries with at least one neutron star are promising standard sirens for an independent measurement of the Hubble constant ()…
A large fraction of hydrogen-rich supernova progenitors experience elevated mass loss shortly prior to explosion
Rachel J. Bruch, Avishay Gal-Yam, Steve Schulze +43
Spectroscopic detection of narrow emission lines traces the presence of circumstellar mass distributions around massive stars exploding as core-collapse supernovae. Transient emiss…
Constraining the Kilonova Rate with Zwicky Transient Facility Searches Independent of Gravitational Wave and Short Gamma-ray Burst Triggers
Igor Andreoni, Erik C. Kool, Ana Sagues Carracedo +34
The first binary neutron star merger, GW170817, was accompanied by a radioactivity-powered optical/infrared transient called a kilonova. To date, no compelling kilonova has been fo…
On the nature of GW190814 and its impact on the understanding of supranuclear matter
Ingo Tews, Peter T. H. Pang, Tim Dietrich +5
The observation of a compact object with a mass of on August 14, 2019, by the LIGO Scientific and Virgo collaborations (LVC) has the potential to improve our u…
Implications of the search for optical counterparts during the second part of the Advanced LIGO's and Advanced Virgo's third observing run: lessons learned for future follow-up observations
Michael W. Coughlin, Tim Dietrich, Sarah Antier +9
Joint multi-messenger observations with gravitational waves and electromagnetic data offer new insights into the astrophysical studies of compact objects. The third Advanced LIGO a…
Kilonova Luminosity Function Constraints based on Zwicky Transient Facility Searches for 13 Neutron Star Mergers
Mansi M. Kasliwal, Shreya Anand, Tomas Ahumada +100
We present a systematic search for optical counterparts to 13 gravitational wave (GW) triggers involving at least one neutron star during LIGO/Virgo's third observing run. We searc…
PS15cey and PS17cke: prospective candidates from the Pan-STARRS Search for Kilonovae
Owen R. McBrien, Stephen J. Smartt, Mark E. Huber +22
Time domain astronomy was revolutionised with the discovery of the first kilonova, AT2017gfo, in August 2017 which was associated with the gravitational wave signal GW170817. Since…
The Spectacular Ultraviolet Flash From the Peculiar Type Ia Supernova 2019yvq
A. A. Miller, M. R. Magee, A. Polin +42
Early observations of Type Ia supernovae (SNeIa) provide essential clues for understanding the progenitor system that gave rise to the terminal thermonuclear explosion. We pres…
Late-Phase Spectropolarimetric Observations of Superluminous Supernova SN 2017egm to Probe the Geometry of the Inner Ejecta
Sei Saito, Masaomi Tanaka, Takashi J. Moriya +6
We present our spectropolarimetric observations of SN 2017egm, a Type I superluminous supernova (SLSN-I) in a nearby galaxy NGC 3191, with Subaru telescope at 185.0 days after the…
Detectability of kilonovae in optical surveys: - examination of the LVC O3 run follow-up
A. Sagués Carracedo, M. Bulla, U. Feindt +1
The detection of the binary neutron star merger GW170817 and the associated electromagnetic (EM) counterpart, the "kilonova" (kN) AT2017gfo, opened a new era in multi-messenger ast…
DECam-GROWTH Search for the Faint and Distant Binary Neutron Star and Neutron Star-Black Hole Mergers in O3a
Shreya Anand, Igor Andreoni, Daniel A. Goldstein +10
Synoptic searches for the optical counterpart to a binary neutron star (BNS) or neutron star-black hole (NSBH) merger can pose significant challenges towards the discovery of kilon…
White dwarf deflagrations for Type Iax supernovae: Polarisation signatures from the explosion and companion interaction
M. Bulla, Z. -W. Liu, F. K. Roepke +5
Growing evidence suggests that Type Iax supernovae might be the result of thermonuclear deflagrations of Chandrasekhar-mass white dwarfs in binary systems. We carry out Monte Carlo…
Multi-messenger constraints on the neutron-star equation of state and the Hubble constant
Tim Dietrich, Michael W. Coughlin, Peter T. H. Pang +5
Observations of neutron-star mergers based on distinct messengers, including gravitational waves and electromagnetic signals, can be used to study the behavior of matter denser tha…
Observational constraints on the optical and near-infrared emission from the neutron star-black hole binary merger S190814bv
K. Ackley, L. Amati, C. Barbieri +151
On 2019 August 14, the LIGO and Virgo interferometers detected a high-significance event labelled S190814bv. Preliminary analysis of the GW data suggests that the event was likely…
ZTF Early Observations of Type Ia Supernovae II: First Light, the Initial Rise, and Time to Reach Maximum Brightness
A. A. Miller, Y. Yao, M. Bulla +17
While it is clear that Type Ia supernovae (SNe) are the result of thermonuclear explosions in C/O white dwarfs (WDs), a great deal remains uncertain about the binary companion that…
ZTF Early Observations of Type Ia Supernovae III: Early-Time Colors as a Test for Explosion Models and Multiple Populations
Mattia Bulla, Adam A. Miller, Yuhan Yao +22
Colors of Type Ia supernovae in the first few days after explosion provide a potential discriminant between different models. In this paper, we present colors of 65 Type Ia s…