Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Vaillancourt, John P"'
Autor:
Gouellec, Valentin J. M. Le, Andersson, B-G, Soam, Archana, Schirmer, Thiébaut, Michail, Joseph M., Lopez-Rodriguez, Enrique, Flores, Sophia, Chuss, David T., Vaillancourt, John E., Hoang, Thiem, Lazarian, Alex
The linear polarization of thermal dust emission provides a powerful tool to probe interstellar and circumstellar magnetic fields, because aspherical grains tend to align themselves with magnetic field lines. While the Radiative Alignment Torque (RAT
Externí odkaz:
http://arxiv.org/abs/2305.01908
Autor:
Soam, Archana, Andersson, B-G, Acosta-Pulido, Jose, López, Manuel Fernández, Vaillancourt, John E., Weaver, Susanna L. Widicus, Piirola, Vilppu, Gordon, Michael S.
Interstellar dust grain alignment causes polarization from UV to mm wavelengths, allowing the study of the geometry and strength of the magnetic field. Over last couple of decades observations and theory have led to the establishment of the Radiative
Externí odkaz:
http://arxiv.org/abs/2011.09579
Autor:
Vaillancourt, John E., Andersson, B-G, Clemens, Dan P., Piirola, Vilppu, Hoang, Thiem, Becklin, Eric E., Caputo, Miranda
The optical and near-infrared (OIR) polarization of starlight is typically understood to arise from the dichroic extinction of that light by dust grains whose axes are aligned with respect to a local magnetic-field. The size distribution of the align
Externí odkaz:
http://arxiv.org/abs/2011.00114
Autor:
Jones, Terry Jay, Kim, Jin-Ah, Dowell, C. Darren, Morris, Mark R., Pineda, Jorge L., Benford, Dominic J., Berthoud, Marc, Chuss, David T., Dale, Daniel A., Fissel, L. M., Goldsmith, Paul F., Hamilton, Ryan T., Hanany, Shaul, Harper, Doyal A., Henning, Thomas K., Lazarian, Alex, Looney, Leslie W., Michail, Joseph M., Novak, Giles, Santos, Fabio P., Sheth, Kartik, Siah, Javad, Stacey, Gordon J., Staguhn, Johannes, Stephens, Ian W., Tassis, Konstantinos, Trinh, Christopher Q., Vaillancourt, John E., Ward-Thompson, Derek, Werner, Michael, Wollack, Edward J., Zweibel, Ellen G.
SOFIA HAWC+ polarimetry at $154~\micron$ is reported for the face-on galaxy M51 and the edge-on galaxy NGC 891. For M51, the polarization vectors generally follow the spiral pattern defined by the molecular gas distribution, the far-infrared (FIR) in
Externí odkaz:
http://arxiv.org/abs/2008.07897
Autor:
Karoly, Janik, Soam, Archana, Andersson, B-G, Coudé, Simon, Bastien, Pierre, Vaillancourt, John E., Lee, Chang Won
We present observations of linear polarization from dust thermal emission at 850 $\mu m$ towards the starless cloud L183. These data were obtained at the James Clerk Maxwell Telescope (JCMT) using the Submillimetre Common-User Bolometer Array 2 (SCUB
Externí odkaz:
http://arxiv.org/abs/2008.02841
Autor:
Michail, Joseph M., Ashton, Peter C., Berthoud, Marc G., Chuss, David T., Dowell, C. Darren, Guerra, Jordan A., Harper, Doyal A., Novak, Giles, Santos, Fabio P., Siah, Javad, Sukay, Ezra, Taylor, Aster, Tram, Le Ngoc, Vaillancourt, John E., Wollack, Edward J.
We analyze the wavelength dependence of the far-infrared polarization fraction toward the OMC-1 star forming region using observations from HAWC+/SOFIA at 53, 89, 154, and 214 $\mu$m. We find that the shape of the far-infrared polarization spectrum i
Externí odkaz:
http://arxiv.org/abs/2008.00310
Autor:
Chuss, David T., Andersson, B-G, Bally, John, Dotson, Jessie L., Dowell, C. Darren, Guerra, Jordan A., Harper, Doyal A., Houde, Martin, Jones, Terry Jay, Lazarian, A., Rodriguez, Enrique Lopez, Michail, Joseph M., Morris, Mark R., Novak, Giles, Siah, Javad, Staguhn, Johannes, Vaillancourt, John E., Volpert, C. G., Werner, Michael, Wollack, Edward J., Benford, Dominic J., Berthoud, Marc, Cox, Erin G., Crutcher, Richard, Dale, Daniel A., Fissel, L. M., Goldsmith, Paul F., Hamilton, Ryan T., Hanany, Shaul, Henning, Thomas K., Looney, Leslie W., Moseley, S. Harvey, Santos, Fabio P., Stephens, Ian, Tassis, Konstantinos, Trinh, Christopher Q., Van Camp, Eric, Ward-Thompson, Derek
We report new polarimetric and photometric maps of the massive star-forming region OMC-1 using the HAWC+ instrument on the Stratospheric Observatory for Infrared Astronomy (SOFIA). We present continuum polarimetric and photometric measurements of thi
Externí odkaz:
http://arxiv.org/abs/1810.08233
Autor:
Houde, Martin, Hull, Charles L. H., Plambeck, Richard L., Vaillancourt, John E., Hildebrand, Roger H.
We expand on the dispersion analysis of polarimetry maps toward applications to interferometry data. We show how the filtering of low-spatial frequencies can be accounted for within the idealized Gaussian turbulence model, initially introduced for si
Externí odkaz:
http://arxiv.org/abs/1602.01873
Autor:
Vaillancourt, John E., Andersson, B-G
Publikováno v:
Vaillancourt & Andersson 2015, ApJ, 812, L7
The alignment of interstellar dust grains with magnetic fields provides a key method for measuring the strength and morphology of the fields. In turn, this provides a means to study the role of magnetic fields from diffuse gas to dense star-forming r
Externí odkaz:
http://arxiv.org/abs/1509.08542
Autor:
Temi, Pasquale, Marcum, Pamela M., Young, Erick, Adams, Joseph D., Adams, Sybil, Andersson, B. -G., Becklin, Eric E., Boogert, Adwin, Brewster, Rick, Burgh, Eric, Cobleigh, Brent R., Culp, Steven, De Buizer, Jim, Dunham, Edward W., Engfer, Christian, Ediss, Geoffrey, Fujieh, Maura, Grashuis, Randy, Gross, Michael, Harmon, Edward, Helton, Andrew, Hoffman, Douglas, Homan, Jeff, Hutwohl, Michael, Jakob, Holger, Jensen, Stephen C., Kaminski, Charles, Kozarsky, Daniel, Krabbe, Alfred, Klein, Randolf, Lammen, Yannick, Lampater, Ulrich, Latter, William B., Le, Jeanette, McKown, Nancy, Melchiorri, Riccardo, Meyer, Allan W., Miles, John, Miller, Walter E., Miller, Scott, Moore, Elizabeth, Nickison, Donald J., Opshaug, Kortney, Pfueller, Enrico, Radomski, James, Rasmussen, John, Reach, William, Reinacher, Andreas, Roellig, Thomas L., Sandell, Goran, Sankrit, Ravi, Savage, Maureen L., Shenoy, Sachindev, Schonfeld, Julie E., Shuping, Ralph Y., Smith, Erin C., Talebi, Ehsan, Teufel, Stefan, Tseng, Ting C., Vacca, William D., Vaillancourt, John, Van Cleve, Jeffrey E., Wiedemann, Manuel, Wolf, Jurgen, Zavala, Eddie, Zeile, Oliver, Zell, Peter T., Zinnecker, Hans
The Stratospheric Observatory for Infrared Astronomy (SOFIA) has recently concluded a set of engineering flights for Observatory performance evaluation. These in-flight opportunities are viewed as a first comprehensive assessment of the Observatory's
Externí odkaz:
http://arxiv.org/abs/1405.7390