The cool brown dwarf Gliese 229 B is a close binary

Autor: Xuan, Jerry W., Mérand, A., Thompson, W., Zhang, Y., Lacour, S., Blakely, D., Mawet, D., Oppenheimer, R., Kammerer, J., Batygin, K., Sanghi, A., Wang, J., Ruffio, J. -B., Liu, M. C., Knutson, H., Brandner, W., Burgasser, A., Rickman, E., Bowens-Rubin, R., Salama, M., Balmer, W., Blunt, S., Bourdarot, G., Caselli, P., Chauvin, G., Davies, R., Drescher, A., Eckart, A., Eisenhauer, F., Fabricius, M., Feuchtgruber, H., Finger, G., Schreiber, N. M. Förster, Garcia, P., Genzel, R., Gillessen, S., Grant, S., Hartl, M., Haußmann, F., Henning, T., Hinkley, S., Hönig, S. F., Horrobin, M., Houllé, M., Janson, M., Kervella, P., Kral, Q., Kreidberg, L., Bouquin, J. -B. Le, Lutz, D., Mang, F., Marleau, G. -D., Millour, F., More, N., Nowak, M., Ott, T., Otten, G., Paumard, T., Rabien, S., Rau, C., Ribeiro, D. C., Bordoni, M. Sadun, Sauter, J., Shangguan, J., Shimizu, T. T., Sykes, C., Soulain, A., Spezzano, S., Straubmeier, C., Stolker, T., Sturm, E., Subroweit, M., Tacconi, L. J., van Dishoeck, E. F., Vigan, A., Widmann, F., Wieprecht, E., Winterhalder, T. O., Woillez, J.

Owing to their similarities with giant exoplanets, brown dwarf companions of stars provide insights into the fundamental processes of planet formation and evolution. From their orbits, several brown dwarf companions are found to be more massive than

Externí odkaz: http://arxiv.org/abs/2410.11953

The GRAVITY young stellar object survey XIV : Investigating the magnetospheric accretion-ejection processes in S CrA N

Autor: GRAVITY Collaboration, Nowacki, H., Perraut, K., Labadie, L., Bouvier, J., Dougados, C., Benisty, M., Wojtczak, J. A., Soulain, A., Alecian, E., Brandner, W., Garatti, A. Caratti o, Lopez, R. Garcia, Ganci, V., Sánchez-Bermúdez, J., Berger, J. -P., Bourdarot, G., Caselli, P., Clénet, Y., Davies, R., Drescher, A., Eckart, A., Eisenhauer, F., Fabricius, M., Feuchtgruber, H., Förster-Schreiber, N. M., Garcia, P., Gendron, E., Genzel, R., Gillessen, S., Grant, S., Henning, T., Jocou, L., Kervella, P., Kurtovic, N., Lacour, S., Lapeyrère, V., Bouquin, J. -B. Le, Lutz, D., Mang, F., Ott, T., Paumard, T., Perrin, G., Rabien, S., Ribeiro, D., Bordoni, M. Sadun, Scheithauer, S., Shangguan, J., Shimizu, T., Spezzano, S., Straubmeier, C., Sturm, E., Tacconi, L., van Dishoeck, E., Vincent, F., Widmann, F.

Publikováno v: A&A 690, A123 (2024)

The dust- and gas-rich protoplanetary disks around young stellar systems play a key role in star and planet formation. While considerable progress has recently been made in probing these disks on large scales of a few tens of astronomical units (au),

Externí odkaz: http://arxiv.org/abs/2408.02374

The GRAVITY young stellar object survey XIII. Tracing the time-variable asymmetric disk structure in the inner AU of the Herbig star HD98922

Autor: GRAVITY Collaboration, Ganci, V., Labadie, L., Perraut, K., Wojtczak, A., Kaufhold, J., Benisty, M., Alecian, E., Bourdarot, G., Brandner, W., Garatti, A. Caratti o, Dougados, C., Lopez, R. Garcia, Sanchez-Bermudez, J., Soulain, A., Amorim, A., Berger, J. -P., Caselli, P., Clénet, Y., Drescher, A., Eckart, A., Eisenhauer, F., Fabricius, M., Feuchtgruber, H., Garcia, P., Gendron, E., Genzel, R., Gillessen, S., Grant, S., Heißel, G., Henning, T., Horrobin, M., Jocou, L., Kervella, P., Lacour, S., Lapeyrère, V., Bouquin, J. -B. Le, Léna, P., Lutz, D., Mang, F., Morujão, N., Ott, T., Paumard, T., Perrin, G., Ribeiro, D., Bordoni, M. Sadun, Scheithauer, S., Shangguan, J., Shimizu, T., Straubmeier, C., Sturm, E., Tacconi, L., van Dishoeck, E., Vincent, F., Woillez, J.

Temporal variability in the photometric and spectroscopic properties of protoplanetary disks is common in YSO. However, evidence pointing toward changes in their morphology over short timescales has only been found for a few sources, mainly due to a

Externí odkaz: http://arxiv.org/abs/2401.17764

A First Look with JWST Aperture Masking Interferometry (AMI): Resolving Circumstellar Dust around the Wolf-Rayet Binary WR 137 beyond the Rayleigh Limit

Autor: Lau, Ryan M., Hankins, Matthew J., Sanchez-Bermudez, Joel, Thatte, Deepashri, Soulain, Anthony, Cooper, Rachel A., Sivaramakrishnan, Anand, Corcoran, Michael F., Greenbaum, Alexandra Z., Gull, Theodore R., Han, Yinuo, Jones, Olivia C., Madura, Thomas, Moffat, Anthony F. J., Morris, Mark R., Onaka, Takashi, Russell, Christopher M. P., Richardson, Noel D., Smith, Nathan, Tuthill, Peter, Volk, Kevin, Weigelt, Gerd, Williams, Peredur M.

We present infrared aperture masking interferometry (AMI) observations of newly formed dust from the colliding winds of the massive binary system Wolf-Rayet (WR) 137 with JWST using the Near Infrared Imager and Slitless Spectrograph (NIRISS). NIRISS

Externí odkaz: http://arxiv.org/abs/2311.15948

Spectroscopic and interferometric signatures of magnetospheric accretion in young stars

Autor: Tessore, B., Soulain, A., Pantolmos, G., Bouvier, J., Pinte, C., Perraut, K.

Publikováno v: A&A 671, A129 (2023)

Methods. We use the code MCFOST to solve the non-LTE problem of line formation in non-axisymmetric accreting magnetospheres. We compute the Br{\gamma} line profile originating from accretion columns for models with different magnetic obliquities. We

Externí odkaz: http://arxiv.org/abs/2301.11628