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14 results on '"Posselt, Bettina"'

1. A Quarter Century of Guitar Nebula/Filament Evolution

Author

de Vries, Martijn, primary, Romani, Roger W., additional, Kargaltsev, Oleg, additional, Pavlov, George, additional, Posselt, Bettina, additional, Slane, Patrick, additional, Bucciantini, Niccolo’, additional, Ng, C.-Y., additional, and Klingler, Noel, additional

Published
2022
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2. X-Ray Analysis of the Proper Motion and Pulsar Wind Nebula for PSR J1741-2054

Author

Auchettl, Katie, Slane, Patrick, Romani, Roger W, Posselt, Bettina, Pavlov, George G, Kargaltsev, Oleg, Ng, C-Y, Temim, Tea, Weisskopf, Martin C, Bykov, Andrei, and Swartz, Douglas

Subjects
Astrophysics, Astronomy
Abstract

We obtained six observations of PSR J1741-2054 using the Chandra ACIS-S detector totaling approx.300 ks. By registering this new epoch of observations to an archival observation taken 3.2 yr earlier using X-ray point sources in the field of view, we have measured the pulsar proper motion at micron = 109 +/- 10 mas yr(exp. -1) in a direction consistent with the symmetry axis of the observed H(alpha) nebula. We investigated the inferred past trajectory of the pulsar but find no compelling association with OB associations in which the progenitor may have originated. We confirm previous measurements of the pulsar spectrum as an absorbed power law with photon index gamma = 2.68 +/- 0.04, plus a blackbody with an emission radius of (4.5(+3.2/-2.5))d(0.38) km, for a DM-estimated distance of 0.38d(0.38) kpc and a temperature of 61.7 +/- 3.0 eV. Emission from the compact nebula is well described by an absorbed power law model with a photon index of gamma = 1.67 +/- 0.06, while the diffuse emission seen as a trail extending northeast of the pulsar shows no evidence of synchrotron cooling. We also applied image deconvolution techniques to search for small-scale structures in the immediate vicinity of the pulsar, but found no conclusive evidence for such structures.

Published
2015
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7. DEEPCHANDRAOBSERVATIONS OF THE PULSAR WIND NEBULA CREATED BY PSR B0355+54

Author

Klingler, Noel, primary, Rangelov, Blagoy, additional, Kargaltsev, Oleg, additional, Pavlov, George G., additional, Romani, Roger W., additional, Posselt, Bettina, additional, Slane, Patrick, additional, Temim, Tea, additional, Ng, C.-Y., additional, Bucciantini, Niccolò, additional, Bykov, Andrei, additional, Swartz, Douglas A., additional, and Buehler, Rolf, additional

Published
2016
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9. LINKING STELLAR CORONAL ACTIVITY AND ROTATION AT 500 MYR: A DEEPCHANDRAOBSERVATION OF M37

Author

Núñez, Alejandro, primary, Agüeros, Marcel A., additional, Covey, Kevin R., additional, Hartman, Joel D., additional, Kraus, Adam L., additional, Bowsher, Emily C., additional, Douglas, Stephanie T., additional, López-Morales, Mercedes, additional, Pooley, David A., additional, Posselt, Bettina, additional, Saar, Steven H., additional, and West, Andrew A., additional

Published
2015
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11. MULTI-WAVELENGTH OBSERVATIONS OF THE RADIO MAGNETAR PSR J1622–4950 AND DISCOVERY OF ITS POSSIBLY ASSOCIATED SUPERNOVA REMNANT

Author

Anderson, Gemma E., primary, Gaensler, B. M., additional, Slane, Patrick O., additional, Rea, Nanda, additional, Kaplan, David L., additional, Posselt, Bettina, additional, Levin, Lina, additional, Johnston, Simon, additional, Murray, Stephen S., additional, Brogan, Crystal L., additional, Bailes, Matthew, additional, Bates, Samuel, additional, Benjamin, Robert A., additional, Ramesh Bhat, N. D., additional, Burgay, Marta, additional, Burke-Spolaor, Sarah, additional, Chakrabarty, Deepto, additional, D'Amico, Nichi, additional, Drake, Jeremy J., additional, Esposito, Paolo, additional, Grindlay, Jonathan E., additional, Hong, Jaesub, additional, Israel, G. L., additional, Keith, Michael J., additional, Kramer, Michael, additional, Lazio, T. Joseph W., additional, Lee, Julia C., additional, Mauerhan, Jon C., additional, Milia, Sabrina, additional, Possenti, Andrea, additional, Stappers, Ben, additional, and Steeghs, Danny T. H., additional

Published
2012
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13. IDENTIFICATION OF A POPULATION OF X-RAY-EMITTING MASSIVE STARS IN THE GALACTIC PLANE

Author

Anderson, Gemma E., primary, Gaensler, B. M., additional, Kaplan, David L., additional, Posselt, Bettina, additional, Slane, Patrick O., additional, Murray, Stephen S., additional, Mauerhan, Jon C., additional, Benjamin, Robert A., additional, Brogan, Crystal L., additional, Chakrabarty, Deepto, additional, Drake, Jeremy J., additional, Drew, Janet E., additional, Grindlay, Jonathan E., additional, Hong, Jaesub, additional, Lazio, T. Joseph W., additional, Lee, Julia C., additional, Steeghs, Danny T. H., additional, and van Kerkwijk, Marten H., additional

Published
2011
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