We report a periodicity of approx.1 day in the highly elevated X-ray emission from the protostar V1647 Ori during its two recent multiple-year outbursts of mass accretion. This periodicity is indicative of protostellar rotation at near-breakup speed. Modeling of the phased X-ray light curve indicates the high-temperature ( 50 MK), X-ray-emitting plasma, which is most likely heated by accretion-induced magnetic reconnection, resides in dense ( 5 1010 cm.3), pancake-shaped magnetic footprints where the accretion stream feeds the newborn star. The sustained X-ray periodicity of V1647 Ori demonstrates that such protostellar magnetospheric accretion configurations can be stable over timescales of years. Subject headings: stars: formation stars: ...
Accepted for publication in Astronomy & Astrophysics.International audienceContext. Class 0 protosta...
Although the environments of star and planet formation are thermodynamically cold, substantial X-ray...
SGG acknowledges support from the Science & Technology Facilities Council (STFC) via an Ernest Ruthe...
The Suzaku X-ray satellite observed the young stellar object V1647 Ori on 2008 October 8 during the ...
We report a ~38 ks X-ray observation of McNeil’s Nebula obtained with XMM-Newton on 2004 April 4. V1...
High-resolution X-ray spectra of high-mass stars and low-mass T-Tauri stars obtained during the firs...
Young O stars are strong, hard, and variable X-ray sources, properties which strongly affect their c...
We present Chandra X-ray Observatory monitoring observations of the recent accretion outburst displa...
We present Chandra X-ray Observatory monitoring observations of the recent accretion outburst displa...
International audienceWe report a 38 ks X-ray observation of McNeil's Nebula obtained with XMM-Newto...
The association between star-forming regions and X-ray emission was discovered as soon as X-ray sat...
Abstract. Until recently, X-rays from low-mass young stars (105 −106 yr) were thought to be a proxy ...
Protostars emit more x-rays, hard and soft, than young sunlike stars in more advanced stages of form...
We have analyzed a number of intense X-ray flares observed in the Chandra Orion Ultradeep Project (C...
Measuring the evolution of X-ray emission from pre-main sequence (PMS) stars gives insight into two ...
Accepted for publication in Astronomy & Astrophysics.International audienceContext. Class 0 protosta...
Although the environments of star and planet formation are thermodynamically cold, substantial X-ray...
SGG acknowledges support from the Science & Technology Facilities Council (STFC) via an Ernest Ruthe...
The Suzaku X-ray satellite observed the young stellar object V1647 Ori on 2008 October 8 during the ...
We report a ~38 ks X-ray observation of McNeil’s Nebula obtained with XMM-Newton on 2004 April 4. V1...
High-resolution X-ray spectra of high-mass stars and low-mass T-Tauri stars obtained during the firs...
Young O stars are strong, hard, and variable X-ray sources, properties which strongly affect their c...
We present Chandra X-ray Observatory monitoring observations of the recent accretion outburst displa...
We present Chandra X-ray Observatory monitoring observations of the recent accretion outburst displa...
International audienceWe report a 38 ks X-ray observation of McNeil's Nebula obtained with XMM-Newto...
The association between star-forming regions and X-ray emission was discovered as soon as X-ray sat...
Abstract. Until recently, X-rays from low-mass young stars (105 −106 yr) were thought to be a proxy ...
Protostars emit more x-rays, hard and soft, than young sunlike stars in more advanced stages of form...
We have analyzed a number of intense X-ray flares observed in the Chandra Orion Ultradeep Project (C...
Measuring the evolution of X-ray emission from pre-main sequence (PMS) stars gives insight into two ...
Accepted for publication in Astronomy & Astrophysics.International audienceContext. Class 0 protosta...
Although the environments of star and planet formation are thermodynamically cold, substantial X-ray...
SGG acknowledges support from the Science & Technology Facilities Council (STFC) via an Ernest Ruthe...