Showing 2018 · astro-ph.HEShow all

42 papers · 2 filters

astro-ph.HE2018★ 845 cited

Relativistic Jets in Active Galactic Nuclei

Roger Blandford, David Meier, Anthony Readhead

The nuclei of most normal galaxies contain supermassive black holes, which can accrete gas through a disk and become active. These Active Galactic Nuclei, AGN, can form jets which…

astro-ph.HE2018★ 97 cited

The Soft-Excess in Mrk 509: Warm Corona or Relativistic Reflection?

Javier A. Garcia, Erin Kara, Dominic Walton +15

We present the analysis of the first NuSTAR observations ( ks), simultaneous with the last SUZAKU observations ( ks), of the active galactic nucleus of the brigh…

astro-ph.HE2018★ 105 cited

Superluminous Supernovae from the Dark Energy Survey

C. R. Angus, M. Smith, M. Sullivan +72

We present a sample of 21 hydrogen-free superluminous supernovae (SLSNe-I), and one hydrogen-rich SLSN (SLSN-II) detected during the five-year Dark Energy Survey (DES). These SNe,…

astro-ph.HE2018★ 21 cited

A Search for Optical Emission from Binary-Black-Hole Merger GW170814 with the Dark Energy Camera

Z. Doctor, R. Kessler, K. Herner +96

Binary black hole (BBH) mergers found by the LIGO and Virgo detectors are of immense scientific interest to the astrophysics community, but are considered unlikely to be sources of…

astro-ph.HE2018★ 23 cited

R-band light-curve properties of Type Ia supernovae from the (intermediate) Palomar Transient Factory

S. Papadogiannakis, A. Goobar, R. Amanullah +15

We present the best 265 sampled R-band light curves of spectroscopically identified Type Ia supernovae (SNe) from the Palomar Transient Factory (PTF; 2009-2012) survey and the inte…

astro-ph.HE2018★ 26 cited

The NANOGrav 11-year Data Set: Pulse Profile Variability

P. R. Brook, A. Karastergiou, M. A. McLaughlin +30

Access to 50 years of data has led to the discovery of pulsar emission and rotation variability on timescales of months and years. Most of this long-term variability has been seen…

astro-ph.HE2018★ 4 cited

Chandra Observations of NuSTAR Serendipitous Sources near the Galactic Plane

John A. Tomsick, George B. Lansbury, Farid Rahoui +8

The NuSTAR serendipitous survey has already uncovered a large number of Active Galactic Nuclei (AGN), providing new information about the composition of the Cosmic X-ray Background…

astro-ph.HE2018★ 297 cited

The Astrophysics of Nanohertz Gravitational Waves

Sarah Burke-Spolaor, Stephen R. Taylor, Maria Charisi +12

Pulsar timing array (PTA) collaborations in North America, Australia, and Europe, have been exploiting the exquisite timing precision of millisecond pulsars over decades of observa…

astro-ph.HE2018★ 59 cited

A comprehensive analysis of anomalous ANITA events disfavors a diffuse tau-neutrino flux origin

A. Romero-Wolf, S. A. Wissel, H. Schoorlemmer +60

Recently, the ANITA collaboration reported on two upward-going extensive air shower events consistent with a primary particle that emerges from the surface of the ice. These events…

astro-ph.HE2018★ 49 cited

Pulse Morphology of the Galactic Center Magnetar PSR J1745-2900

Aaron B. Pearlman, Walid A. Majid, Thomas A. Prince +2

We present results from observations of the Galactic Center magnetar, PSR J1745-2900, at 2.3 and 8.4 GHz with the NASA Deep Space Network 70 m antenna, DSS-43. We study the magneta…

astro-ph.HE2018★ 3 cited

A Search For Pulsations in the Optical Light Curve of the Nova ASASSN-17hx

Lee J. Rosenthal, Ken J. Shen, Gregg Hallinan +4

We present high-speed optical observations of the nova ASASSN-17hx, taken both immediately after its discovery and close to its first peak in brightness, to search for seconds -- m…

astro-ph.HE2018

Galactic Center Pulsars with the ngVLA

Geoffrey C. Bower, Shami Chatterjee, Jim Cordes +9

Pulsars in the Galactic Center (GC) are important probes of General Relativity, star formation, stellar dynamics, stellar evolution, and the interstellar medium. Despite years of s…

astro-ph.HE2018★ 114 cited

A hot and fast ultra-stripped supernova that likely formed a compact neutron star binary

K. De, M. M. Kasliwal, E. O. Ofek +24

Compact neutron star binary systems are produced from binary massive stars through stellar evolution involving up to two supernova explosions. The final stages in the formation of…

astro-ph.HE2018★ 55 cited

NuSTAR reveals the hidden nature of SS433

M. J. Middleton, D. J. Walton, W. Alston +25

SS433 is the only Galactic binary system known to persistently accrete at highly super-critical (or hyper-critical) rates, similar to those in tidal disruption events, and likely n…

astro-ph.HE2018★ 2 cited

Upward-Pointing Cosmic-Ray-like Events Observed with ANITA

Andres Romero-Wolf, P. W. Gorham, J. Nam +73

These proceedings address a recent publication by the ANITA collaboration of four upward- pointing cosmic-ray-like events observed in the first flight of ANITA. Three of these even…

astro-ph.HE2018★ 8 cited

The NuSTAR Extragalactic Surveys: unveiling rare, buried AGNs and detecting the contributors to the peak of the Cosmic X-ray Background

Alberto Masini, Andrea Comastri, Francesca Civano +7

We report on the results of active galactic nuclei (AGNs) detection by NuSTAR performed in three extragalactic survey fields (COSMOS, UDS, ECDFS) in three hard bands, namely H1 (8-…

astro-ph.HE2018★ 50 cited

Expanding the LISA Horizon from the Ground

Kaze W. K. Wong, Ely D. Kovetz, Curt Cutler +1

The Laser Interferometer Space Antenna (LISA) gravitational-wave (GW) observatory will be limited in its ability to detect mergers of binary black holes (BBHs) in the stellar-mass…

astro-ph.HE2018★ 2 cited

A UV Resonance Line Echo from a Shell Around a Hydrogen-Poor Superluminous Supernova

R. Lunnan, C. Fransson, P. M. Vreeswijk +21

Hydrogen-poor superluminous supernovae (SLSN-I) are a class of rare and energetic explosions discovered in untargeted transient surveys in the past decade. The progenitor stars and…

astro-ph.HE2018★ 23 cited

NuSTAR observations of Mrk 766: distinguishing reflection from absorption

D. J. K. Buisson, M. L. Parker, E. Kara +14

We present two new NuSTAR observations of the narrow line Seyfert 1 (NLS1) galaxy Mrk 766 and give constraints on the two scenarios previously proposed to explain its spectrum and…

astro-ph.HE2018★ 30 cited

The NANOGrav 11-Year Data Set: Arecibo Observatory Polarimetry And Pulse Microcomponents

Peter A. Gentile, Maura A. McLaughlin, Paul B. Demorest +25

We present the polarization pulse profiles for 28 pulsars observed with the Arecibo Observatory by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) timin…

astro-ph.HE2018★ 193 cited

Orbital Migration of Interacting Stellar Mass Black Holes in Disks around Supermassive Black Holes

Amy Secunda, Jillian Bellovary, Mordecai-Mark Mac Low +5

The merger rate of stellar-mass black hole binaries (sBHBs) inferred by the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) suggests the need for an efficient s…

astro-ph.HE2018★ 41 cited

iPTF 16hgs: A double-peaked Ca-rich gap transient in a metal poor, star forming dwarf galaxy

Kishalay De, Mansi M. Kasliwal, Therese Cantwell +18

Calcium rich gap transients represent an intriguing new class of faint and fast evolving supernovae that exhibit strong [Ca II] emission in their nebular phase spectra. In this pap…

astro-ph.HE2018★ 93 cited

Mining Gravitational-wave Catalogs To Understand Binary Stellar Evolution: A New Hierarchical Bayesian Framework

Stephen R. Taylor, Davide Gerosa

Catalogs of stellar-mass compact binary systems detected by ground-based gravitational-wave instruments (such as Advanced LIGO and Advanced Virgo) will offer insights into the demo…

astro-ph.HE2018★ 20 cited

A long hard-X-ray look at the dual active galactic nuclei of M51 with NuSTAR

M. Brightman, M. Baloković, M. Koss +14

We present a broadband X-ray spectral analysis of the M51 system, including the dual active galactic nuclei (AGN) and several off-nuclear point sources. Using a deep observation by…