Jennifer L. Sokoloski - Columbia University

Jennifer L. Sokoloski
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Name
Jennifer L. Sokoloski
Affiliation
Columbia University
City
New York
Country
United States

Pubs By Year

Pub Categories

 
High Energy Astrophysical Phenomena (9)
 
Solar and Stellar Astrophysics (7)
 
Astrophysics (3)
 
Astrophysics of Galaxies (1)
 
Instrumentation and Methods for Astrophysics (1)

Publications Authored By Jennifer L. Sokoloski

It has recently been discovered that some, if not all, classical novae emit GeV gamma-rays during outburst, but the mechanics of this gamma-ray emission are still not well understood. We present here a comprehensive, multi-wavelength dataset---from radio to X-rays---for the most gamma-ray luminous classical nova to-date, V1324 Sco. Using this dataset, we show that V1324 Sco is a canonical dusty Fe-II type nova, with a bulk ejecta velocity of $1150 \pm 40~\rm km~s^{-1}$ and an ejecta mass of $2. Read More

The thermal radio emission of novae during outburst enables us to derive fundamental quantities such as the ejected mass, kinetic energy, and density profile of the ejecta. Recent observations with newly-upgraded facilities such as the VLA and e-MERLIN are just beginning to reveal the incredibly complex processes of mass ejection in novae (ejections appear to often proceed in multiple phases and over prolonged timescales). Symbiotic stars can also exhibit outbursts, which are sometimes accompanied by the expulsion of material in jets. Read More

The radio light curves of novae rise and fall over the course of months to years, allowing for detailed observations of the evolution of the nova shell. However, the main parameter determined by radio models of nova explosions - the mass of the ejecta - often seems to exceed theoretical expectations by an order of magnitude. With the recent technological improvements on the Karl G. Read More

2013May
Affiliations: 1Eberhard Karls Universitaet Tuebingen, 2CONICET-UBA, 3Harvard-Smithsonian Center for Astrophysics, 4Columbia University

Hen 3-1341 is a symbiotic binary system consisting of a white dwarf and a red giant star that is one of about ten symbiotics that show hints of jets. The bipolar jets have been detected through displaced components of emission lines during its outburst from 1998 to 2004. These components disappeared when Hen 3-1341 reached quiescence. Read More

Novae, which are the sudden visual brightening triggered by runaway thermonuclear burning on the surface of an accreting white dwarf, are fairly common and bright events. Despite their astronomical significance as nearby laboratories for the study of nuclear burning and accretion phenomena, many aspects of these common stellar explosions are observationally not well-constrained and remain poorly understood. Radio observations, modeling and interpretation can potentially play a crucial role in addressing some of these puzzling issues. Read More

We present multi-frequency radio observations of the 2010 nova event in the symbiotic binary V407 Cygni, obtained with the Karl G. Jansky Very Large Array and spanning 1-45 GHz and 17-770 days following discovery. This nova---the first ever detected in gamma rays---shows a radio light curve dominated by the wind of the Mira giant companion, rather than the nova ejecta themselves. Read More

We present a summary of Swift and Suzaku X-ray observations of the 2010 nova outburst of the symbiotic star, V407 Cyg. The Suzaku spectrum obtained on day 30 indicates the presence of the supersoft component from the white dwarf surface, as well as optically thin component from the shock between the nova ejecta and the Mira wind. The Swift observations then allow us to track the evolution of both components from day 4 to day 150. Read More

We present recent results of quiescent X-ray observations of recurrent novae (RNe) and related objects. Several RNe are luminous hard X-ray sources in quiescence, consistent with accretion onto a near Chandrasekhar mass white dwarf. Detection of similar hard X-ray emissions in old novae and other cataclysmic variables may lead to identification of additional RN candidates. Read More

2011Feb
Affiliations: 1Eberhard Karls Universitaet Tuebingen, Germany, 2Harvard-Smithsonian CfA, USA, 3Columbia University, USA

We report the detection of X-ray emission from the symbiotic star V1329 Cyg with XMM-Newton. The spectrum from the EPIC pn, MOS1 and MOS2 instruments consists of a two-temperature plasma with k T = 0.11 keV and k T = 0. Read More

2009Mar
Affiliations: 1NOAO, 2Columbia Univ, 3LCOGT, 4UC, Berkeley, 5Harvard CfA, 6UC, Berkeley, 7Chicago State Univ., 8Univ. of Nottingham, 9Caltech, 10Griffith Obs., 11Univ of Wisconsin, Madison, 12Rutgers Univ., 13NYU, 14Univ. of Florida, 15Univ. of Denver, 16Univ. of Michigan, 17Univ. of Hawaii, 18NCAR, 19UNC, 20UC, Irvine, 21UC, Santa Cruz, 22San Diego State Univ., 23Univ. of Colorado, Boulder, 24Univ. of Amsterdam, 25OCIW, 26Caltech, 27Lehigh University, 28Indiana Univ., 29UC, Irvine, 30CTIO, 31Columbia Univ., 32Texas A&M

The NSF's Astronomy and Astrophysics Postdoctoral Fellowship (AAPF) is exceptional among the available postdoctoral awards in Astronomy and Astrophysics. The fellowship is one of the few that allows postdoctoral researchers to pursue an original research program, of their own design, at the U.S. Read More

2008Feb
Affiliations: 1NRAO, 2U. Southampton, 3U. Southampton, 4U. Southampton, 5U. Southampton, 6U. Southampton, 7U. Amsterdam, 8MSSL, 9Columbia, 10U. Manchester, 11U. Manchester
Category: Astrophysics

Jets from X-ray binaries are continuously injecting matter and energy into the surrounding interstellar medium (ISM). However, there exist to date relatively few cases where jet-ISM interactions have been directly observed. We review the current examples, and go on to present new data on the proposed hotspots of GRS1915+105, finding no concrete evidence for any association between the hotspots and the central source, in agreement with previous findings in the literature. Read More

2007Nov

We report high-resolution radio imaging of the recurrent nova RS Ophiuchi (RS Oph) during the first month of the 2006 outburst, using the Very Long Baseline Array (VLBA). Observations made on days 20.8 and 26. Read More

2007Nov

We present Suzaku X-ray observations of the recurrent nova T CrB in quiescence. T CrB is the first recurrent nova to be detected in the hard-X-ray band (E ~ 40.0 keV) during quiescence. Read More