Zobrazeno 1 - 10
of 492
pro vyhledávání: '"Homeier, D"'
Autor:
Ravinet, T., Reylé, C., Lagarde, N., Burgasser, A., Smart, R. L., Moya, W. H., Marocco, F., Scholz, R. -D., Cooper, W. J., Cruz, K. L., Fernández-Trincado, J. G., Homeier, D., Sarro, L. M.
Publikováno v:
A&A, 685, A6 (2024)
Context: The local census of very low-mass stars and brown dwarfs is crucial to improving our understanding of the stellar-substellar transition and their formation history. These objects, known as ultra-cool dwarfs (UCDs), are essential targets for
Externí odkaz:
http://arxiv.org/abs/2402.09783
Autor:
Palma-Bifani, P., Chauvin, G., Bonnefoy, M., Rojo, P. M., Petrus, S., Rodet, L., Langlois, M., Allard, F., Charnay, B., Desgrange, C., Homeier, D., Lagrange, A. -M., Beuzit, J. -L., Baudoz, P., Boccaletti, A., Chomez, A., Delorme, P., Desidera, S., Feldt, M., Ginski, C., Gratton, R., Maire, A. -L., Meyer, M., Samland, M., Snellen, I., Vigan, A., Zhang, Y.
Publikováno v:
A&A 670, A90 (2023)
We aim to revisit the system AB Pic which has a known companion at the exoplanet/ brown-dwarf boundary. We based this study on a rich set of observations to investigate the companion's orbit and atmosphere. We composed a spectrum of AB Pic b merging
Externí odkaz:
http://arxiv.org/abs/2211.01474
Publikováno v:
A&A 642, A39 (2020)
Observations of ultra-hot Jupiters indicate the existence of thermal inversion in their atmospheres with day-side temperatures greater than 2200 K. Various physical mechanisms such as non-local thermal equilibrium, cloud formation, disequilibrium che
Externí odkaz:
http://arxiv.org/abs/2008.01288
Using the high-resolution near-infrared adaptive optics imaging from the NaCo instrument at the Very Large Telescope, we report the discovery of a new binary companion to the M-dwarf LP 1033-31 and also confirm the binarity of LP 877-72. We have char
Externí odkaz:
http://arxiv.org/abs/2007.11660
Autor:
Rajpurohit, A. S., Kumar, Vipin, Srivastava, Mudit K., Allard, F., Homeier, D., Dixit, Vaibhav, Patel, Ankita
Mt. Abu Faint Object Spectrograph and Camera (MFOSC-P) is an in-house developed instrument for Physical Research Laboratory (PRL) 1.2m telescope at Mt. Abu India, commissioned in February 2019. Here we present the first science results derived from t
Externí odkaz:
http://arxiv.org/abs/2001.05683
Autor:
Lodieu, N., Allard, F., Rodrigo, C., Pavlenko, Y., Burgasser, A., Lyubchik, Y., Kaminsky, B., Homeier, D.
Publikováno v:
A&A 628, A61 (2019)
The aim of the project is to define a metallicity/gravity/temperature scale vs spectral types for metal-poor M dwarfs. We obtained intermediate-resolution ultraviolet (R~3300), optical (R~5400), and near-infrared (R~3900) spectra of 43 M subdwarfs (s
Externí odkaz:
http://arxiv.org/abs/1907.03674
Autor:
Napiwotzki, R., Karl, C. A., Lisker, T., Catalan, S., Drechsel, H., Heber, U., Homeier, D., Koester, D., Leibundgut, B., Marsh, T. R., Moehler, S., Nelemans, G., Reimers, D., Renzini, A., Stroer, A., Yungelson, L.
Publikováno v:
A&A 638, A131 (2020)
Close double degenerate binaries are one of the favoured progenitor channels for type Ia supernovae, but it is unclear how many suitable systems there are in the Galaxy. We report results of a large radial velocity survey for double degenerate (DD) b
Externí odkaz:
http://arxiv.org/abs/1906.10977
Autor:
Zhang, Z. H., Galvez-Ortiz, M. C., Pinfield, D. J., Burgasser, A. J., Lodieu, N., Jones, H. R. A., Martin, E. L., Burningham, B., Homeier, D., Allard, F., Osorio, M. R. Zapatero, Smith, L. C., Smart, R. L., Marti, B. Lopez, Marocco, F., Rebolo, R.
We present 27 new L subdwarfs and classify five of them as esdL and 22 as sdL. Our L subdwarf candidates were selected with the UKIRT Infrared Deep Sky Survey and Sloan Digital Sky Survey. Spectroscopic follow-up was carried out primarily with the OS
Externí odkaz:
http://arxiv.org/abs/1807.10560
Autor:
Bonnefoy, M., Perraut, K., Lagrange, A. -M., Delorme, P., Vigan, A., Line, M., Rodet, L., Ginski, C., Mourard, D., Marleau, G. -D., Samland, M., Tremblin, P., Ligi, R., Cantalloube, F., Mollière, P., Charnay, B., Kuzuhara, M., Janson, M., Morley, C., Homeier, D. D., Orazi, V. D, Klahr, H., Mordasini, C., Lavie, B., Baudino, J. -L., Beust, H., Peretti, S., Bartucci, A. Musso, Mesa, D., Bézard, B., Boccaletti, A., Galicher, R., Hagelberg, J., Desidera, S., Biller, B., Maire, A. -L., Allard, F., Borgniet, S., Lannier, J., Meunier, N., Desort, M., Alecian, E., Chauvin, G., Langlois, M., Henning, T., Mugnier, L., Mouillet, D., Gratton, R., Brandt, T., Elwain, M. Mc, Beuzit, J. -L., Tamura, M., Hori, Y., Brandner, W., Buenzli, E., Cheetham, A, Cudel, M., Feldt, M., Kasper, M., Keppler, M., Kopytova, T., Meyer, M., Perrot, C., Rouan, D., Salter, G, Schmidt, T., Sissa, E., Zurlo, A., Wildi, F., Blanchard, P., De Caprio, V., Delboulbé, A., Maurel, D., Moulin, T., Pavlov, A., Rabou, P., Ramos, J., Roelfsema, R., Rousset, G., Stadler, E., Rigal, F., Weber, L.
Publikováno v:
A&A 618, A63 (2018)
The G-type star GJ504A is known to host a 3 to 35 MJup companion whose temperature, mass, and projected separation all contribute to make it a test case for the planet formation theories and for atmospheric models of giant planets and light brown dwa
Externí odkaz:
http://arxiv.org/abs/1807.00657
Autor:
Rodet, L., Bonnefoy, M., Durkan, S., Beust, H., Lagrange, A-M, Schlieder, J. E., Janson, M., Grandjean, A., Chauvin, G., Messina, S., Maire, A. -L., Brandner, W., Girard, J., Delorme, P., Biller, B., Bergfors, C., Lacour, S., Feldt, M., Henning, T., Boccaletti, A., Bouquin, J. -B. Le, Berger, J. -P., Monin, J. -L., Udry, S., Peretti, S., Segransan, D., Allard, F., Homeier, D., Vigan, A., Langlois, M., Hagelberg, J., Menard, F., Bazzon, A., Beuzit, J. -L., Delboulbe, A., Desidera, S., Gratton, R., Lannier, J., Ligi, R., Maurel, D., Mesa, D., Meyer, M., Pavlov, A., Ramos, J., Rigal, R., Roelfsema, R., Salter, G., Samland, M., Schmidt, T., Stadler, E., Weber, L.
Publikováno v:
A&A 618, A23 (2018)
Evolutionary models are widely used to infer the mass of stars, brown dwarfs, and giant planets. Their predictions are thought to be less reliable at young ages ($<$ 200 Myr) and in the low-mass regime ($\mathrm{<1~M_{\odot}}$). GJ 2060 AB and TWA 22
Externí odkaz:
http://arxiv.org/abs/1806.05491