Solar mass ≈ Solar mass
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Gravitational-Wave Constraints on the Neutron-Star-Matter Equation of State Open
The detection of gravitational waves originating from a neutron-star merger, GW170817, by the LIGO and Virgo Collaborations has recently provided new stringent limits on the tidal deformabilities of the stars involved in the collision. Com…
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Pulsational Pair-instability Supernovae Open
The final evolution of stars in the mass range 70–140 is explored. Depending upon their mass loss history and rotation rates, these stars will end their lives as pulsational pair-instability supernovae (PPISN) producing a great varie…
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GW190814: Gravitational Waves from the Coalescence of a 23 Solar Mass Black Hole with a 2.6 Solar Mass Compact Object Open
We report the observation of a compact binary coalescence involving a 22.2-24.3 M o˙ black hole and a compact object with a mass of 2.50-2.67 M o˙ (all measurements quoted at the 90% credible level). The gravitational-wave signal, GW190814…
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Hybrid stars that masquerade as neutron stars Open
We show that a hybrid (nuclear + quark matter) star can have a mass-radius relationship very similar to that predicted for a star made of purely nucleonic matter. We show this for a generic parameterization of the quark matter equation of …
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Modelling the nebular emission from primeval to present-day star-forming galaxies Open
We present a new model of the nebular emission from star-forming galaxies in a wide range of chemical compositions, appropriate to interpret observations of galaxies at all cosmic epochs. The model relies on the combination of state-of-the…
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THE REMARKABLE DEATHS OF 9–11 SOLAR MASS STARS Open
The post-helium burning evolution of stars from 7 to 11 solar masses is complicated by the lingering effects of degeneracy and off-center ignition. Here stars in this mass range are studied using a standard set of stellar physics. Two impo…
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Massive black hole binaries from runaway collisions: the impact of metallicity Open
The runaway collision scenario is one of the most promising mechanisms to explain the formation of intermediate-mass black holes (IMBHs) in young dense star clusters. On the other hand, the massive stars that participate in the runaway col…
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STARS, GAS, AND DARK MATTER IN THE SOLAR NEIGHBORHOOD Open
The surface density and vertical distribution of stars, stellar remnants, and gas in the solar vicinity form important ingredients for understanding the star formation history of the Galaxy as well as for inferring the local density of dar…
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Cygnus X-1 contains a 21–solar mass black hole—Implications for massive star winds Open
A heavy black hole in an x-ray binary If a black hole interacts with a binary companion star, the system emits x-rays and can form a radio jet. The masses of black holes in these x-ray binaries are all lower than those detected using gravi…
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Supernova simulations from a 3D progenitor model – Impact of perturbations and evolution of explosion properties Open
We study the impact of large-scale perturbations from convective shell\nburning on the core-collapse supernova explosion mechanism using\nthree-dimensional (3D) multi-group neutrino hydrodynamics simulations of an 18\nsolar mass progenitor…
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Femtolensing by dark matter revisited Open
Femtolensing of gamma ray bursts (GRBs) has been put forward as an exciting possibility to probe exotic astrophysical objects with masses below 10 −13 solar masses such as small primordial black holes or ultra-compact dark matter minihalos…
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The Close Binary Fraction of Solar-type Stars Is Strongly Anticorrelated with Metallicity Open
There is now strong evidence that the close binary fraction ( P < 10 4 days; a < 10 au) of solar-type stars ( M 1 ≈ 0.6–1.5 ) decreases significantly with metallicity. Although early surveys showed that the observed spectroscopic binary (S…
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A detached stellar-mass black hole candidate in the globular cluster NGC 3201 Open
As part of our massive spectroscopic survey of 25 Galactic globular clusters with MUSE, we performed multiple epoch observations of NGC 3201 with the aim of constraining the binary fraction. In this cluster, we found one curious star at th…
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THE SOLAR NEIGHBORHOOD. XXXVII. THE MASS–LUMINOSITY RELATION FOR MAIN-SEQUENCE M DWARFS* Open
We present a mass–luminosity relation (MLR) for red dwarfs spanning a range of masses from 0.62 to the end of the stellar main sequence at 0.08 . The relation is based on 47 stars for which dynamical masses have been determined, primarily …
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Be it therefore resolved: cosmological simulations of dwarf galaxies with 30 solar mass resolution Open
We study a suite of extremely high-resolution cosmological Feedback in Realistic Environments simulations of dwarf galaxies ($M_{\rm halo} \lesssim 10^{10}\rm \, M_{\odot }$), run to z = 0 with $30\, \mathrm{M}_{\odot }$ resolution, suffic…
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GW190814: Impact of a 2.6 solar mass neutron star on the nucleonic equations of state Open
Is the secondary component of GW190814 the lightest black hole or the heaviest neutron star ever discovered in a double compact-object system? This is the central question animating this paper. Covariant density functional theory provides …
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PTF12os and iPTF13bvn Open
Context. We investigate two stripped-envelope supernovae (SNe) discovered in the nearby galaxy NGC 5806 by the (intermediate) Palomar Transient Factory [(i)PTF]. These SNe, designated PTF12os/SN 2012P and iPTF13bvn, exploded within ~520 da…
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Search for Subsolar Mass Ultracompact Binaries in Advanced LIGO’s Second Observing Run Open
We present a search for subsolar mass ultracompact objects in data obtained during Advanced LIGO's second observing run. In contrast to a previous search of Advanced LIGO data from the first observing run, this search includes the eff…
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Dynamics of Dwarf Galaxies Disfavor Stellar-Mass Black Holes as Dark Matter Open
We study the effects of black hole dark matter on the dynamical evolution of stars in dwarf galaxies. We find that mass segregation leads to a depletion of stars in the center of dwarf galaxies and the appearance of a ring in the projected…
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Gravitational waves from the remnants of the first stars Open
Gravitational waves (GWs) provide a revolutionary tool to investigate yet unobserved astrophysical objects. Especially the first stars, which are believed to be more massive than present-day stars, might be indirectly observable via the me…
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Improved Dynamical Constraints on the Masses of the Central Black Holes in Nearby Low-mass Early-type Galactic Nuclei and the First Black Hole Determination for NGC 205 Open
We improve the dynamical black hole (BH) mass estimates in three nearby low-mass early-type galaxies: NGC 205, NGC 5102, and NGC 5206. We use new Hubble Space Telescope ( HST )/STIS spectroscopy to fit the star formation histories of the n…
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STAR FORMATION RATE AND DYNAMICAL MASS OF 10<sup>8</sup>SOLAR MASS BLACK HOLE HOST GALAXIES AT REDSHIFT 6 Open
We present ALMA observations of two moderate luminosity quasars at redshift\n6. These quasars from the Canada-France High-z Quasar Survey (CFHQS) have black\nhole masses of ~10^8 M_solar. Both quasars are detected in the [CII] line and\ndu…
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Relativistic deflection of background starlight measures the mass of a nearby white dwarf star Open
General relativity weighs a white dwarf Light from a background star is deflected by the gravitational field of the Sun. This effect was used in 1919 to provide some of the first evidence for general relativity. Sahu et al. applied the con…
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Different to the core: The pre-supernova structures of massive single and binary-stripped stars Open
The majority of massive stars live in binary or multiple systems and will interact with a companion during their lifetimes, which helps to explain the observed diversity of core-collapse supernovae. Donor stars in binary systems can lose m…
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On the Maximum Mass of Accreting Primordial Supermassive Stars Open
Supermassive primordial stars are suspected to be the progenitors of the most massive quasars at z ∼ 6. Previous studies of such stars were either unable to resolve hydrodynamical timescales or considered stars in isolation, not in the ext…
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Mass transfer from giant donors Open
The stability of mass transfer in binaries with convective giant donors\nremains an open question in modern astrophysics. There is a significant\ndiscrepancy between what the existing methods predict for a response to mass\nloss of the gia…
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Chemical evolution with rotating massive star yields II. A new assessment of the solar s- and r- process components Open
The decomposition of the Solar system abundances of heavy isotopes into their s- and r- components plays a key role in our understanding of the corresponding nuclear processes and the physics and evolution of their astrophysical sites. We …
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Formation of Massive Black Holes in Galactic Nuclei: Runaway Tidal Encounters Open
Nuclear star clusters (NSCs) and supermassive black holes (SMBHs) both inhabit galactic nuclei, coexisting in a range of bulge masses, but excluding each other in the largest or smallest galaxies. We propose that the transformation of NSCs…
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Supersonic gas streams enhance the formation of massive black holes in the early universe Open
Making the first supermassive black holes Supermassive black holes existed less than a billion years after the Big Bang. Because black holes can grow at a maximum rate that depends on their current mass, it has been difficult to understand…
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Constraining the masses of microlensing black holes and the mass gap with <i>Gaia</i> DR2 Open
Context. Gravitational microlensing is sensitive to compact-object lenses in the Milky Way, including white dwarfs, neutron stars, or black holes, and could potentially probe a wide range of stellar-remnant masses. However, the mass of the…