First Resolution of Microlensed Images of a Binary-Lens Event

Autor: Wu, Zexuan, Dong, Subo, Mérand, A., Kochanek, Christopher S., Mróz, Przemek, Shangguan, Jinyi, Christie, Grant, Tan, Thiam-Guan, Bensby, Thomas, Bland-Hawthorn, Joss, Buder, Sven, Eisenhauer, Frank, Gould, Andrew P., Kos, Janez, Natusch, Tim, Sharma, Sanjib, Udalski, Andrzej, Woillez, J., Buckley, David A. H., Thompson, I. B., Dayem, Karim Abd El, Alecian, Evelyne, Babusiaux, Carine, Berdeu, Anthony, Berger, Jean-Philippe, Bourdarot, Guillaume, Brandner, Wolfgang, Clavel, Maica, Davies, Richard I., Defrère, Denis, Dougados, Catherine, Drescher, Antonia, Eckart, Andreas, Fabricius, Maximilian, Feuchtgruber, Helmut, Schreiber, Natascha M. Förster, Garcia, Paulo, Genzel, Reinhard, Gillessen, Stefan, Heißel, Gernot, Hönig, Sebastian, Houlle, Mathis, Kervella, Pierre, Kreidberg, Laura, Lacour, Sylvestre, Lai, Olivier, Laugier, Romain, Bouquin, Jean-Baptiste Le, Leftley, James, Lopez, Bruno, Lutz, Dieter, Mang, Felix, Millour, Florentin, Montargès, Miguel, Nowacki, Hugo, Nowak, Mathias, Ott, Thomas, Paumard, Thibaut, Perraut, Karine, Perrin, Guy, Petrov, Romain, Petrucci, Pierre-Olivier, Pourre, Nicolas, Rabien, Sebastian, Ribeiro, Diogo C., Robbe-Dubois, Sylvie, Bordoni, Matteo Sadun, Santos, Daryl, Sauter, Jonas, Scigliuto, Jules, Shimizu, Taro T., Straubmeier, Christian, Sturm, Eckhard, Subroweit, Matthias, Sykes, Calvin, Tacconi, Linda, Vincent, Frédéric, Widmann, Felix

We resolve the multiple images of the binary-lens microlensing event ASASSN-22av using the GRAVITY instrument of the Very Large Telescope Interferometer (VLTI). The light curves show weak binary perturbations, complicating the analysis, but the joint

Externí odkaz: http://arxiv.org/abs/2409.13015

Discovery of Magnetospheric Interactions in the Doubly-Magnetic Hot Binary $\epsilon$ Lupi

Autor: Biswas, Ayan, Das, Barnali, Chandra, Poonam, Wade, Gregg A., Shultz, Matthew E., Cavallaro, Francesco, Petit, Veronique, Woudt, Patrick A., Alecian, Evelyne

Magnetic fields are extremely rare in close, hot binaries, with only 1.5\% of such systems known to contain a magnetic star. The eccentric $\epsilon$ Lupi system stands out in this population as the only close binary in which both stars are known to

Externí odkaz: http://arxiv.org/abs/2306.05995

Discovery of eight 'Main-sequence Radio Pulse emitters' using the GMRT: clues to the onset of coherent radio emission in hot magnetic stars

Autor: Das, Barnali, Chandra, Poonam, Shultz, Matt E., Wade, Gregg A., Sikora, James, Kochukhov, Oleg, Neiner, Coralie, Oksala, Mary E., Alecian, Evelyne

'Main-sequence radio pulse-emitters' (MRPs) are magnetic early-type stars from which periodic radio pulses, produced via electron cyclotron maser emission (ECME), are observed. Despite the fact that these stars can naturally offer suitable conditions

Externí odkaz: http://arxiv.org/abs/2109.04043

Fossil field decay due to nonlinear tides in massive binaries

Autor: Vidal, Jérémie, Cébron, David, Ud-Doula, Asif, Alecian, Evelyne

Publikováno v: A&A 629, A142 (2019)

Surface magnetic fields have been detected in 5 to 10% of isolated massive stars, hosting outer radiative envelopes. They are often thought to have a fossil origin, resulting from the stellar formation phase. Yet, magnetic massive stars are scarcer i

Externí odkaz: http://arxiv.org/abs/1902.10599

HD 35502: a hierarchical triple system with a magnetic B5IVpe primary

Autor: Sikora, James, Wade, Gregg, Bohlender, David, Shultz, Matt, Adelman, Saul, Alecian, Evelyne, Hanes, David, Monin, Dmitry, Neiner, Coralie, MiMeS, the, Collaborations, BinaMIcS

We present our analysis of HD~35502 based on high- and medium-resolution spectropolarimetric observations. Our results indicate that the magnetic B5IVsnp star is the primary component of a spectroscopic triple system and that it has an effective temp

Externí odkaz: http://arxiv.org/abs/1605.01353