Zobrazeno 1 - 10
of 18
pro vyhledávání: '"621"'
Autor:
Li, Zhongmu, Mao, Caiyan
Open clusters (OCs) are common in the Milky Way, but most of them remain undiscovered. There are numerous techniques (e.g., machine-learning algorithms) available for the exploration of OCs. However, each method has its limitations and therefore, dif
Externí odkaz:
http://arxiv.org/abs/2401.10717
Autor:
Tokovinin, Andrei
Publikováno v:
The Astronomical Journal, 2023, V. 165
There should be about 10,000 stellar hierarchical systems within 100 pc with primary stars more massive than 0.5 Msun, and a similar amount of less massive hierarchies. A list of 8000 candidate multiples is derived from wide binaries found in the Gai
Externí odkaz:
http://arxiv.org/abs/2303.17620
The Wideband Sensitivity Upgrade (WSU) is the top priority initiative for the ALMA2030 Development Roadmap. The WSU will initially double, and eventually quadruple, ALMA's system bandwidth and will deliver improved sensitivity by upgrading the receiv
Externí odkaz:
http://arxiv.org/abs/2211.00195
Autor:
Cruzalèbes, P., Petrov, R. G., Robbe-Dubois, S., Varga, J., Burtscher, L., Allouche, F., Berio, P., Hofmann, K. -H., Hron, J., Jaffe, W., Lagarde, S., Lopez, B., Matter, A., Meilland, A., Meisenheimer, K., Millour, F., Schertl, D.
We present the Mid-infrared stellar Diameters and Fluxes compilation Catalogue (MDFC) dedicated to long-baseline interferometry at mid-infrared wavelengths (3-13 mum). It gathers data for half a million stars, i.e. nearly all the stars of the Hipparc
Externí odkaz:
http://arxiv.org/abs/1910.00542
Autor:
Zakharenko, Olena, Lewen, Frank, Ilyushin, Vadim V., Drozdovskaya, Maria N., Jørgensen, Jes K., Schlemmer, Stephan, Müller, Holger S. P.
Publikováno v:
A&A 621, A114 (2019)
Methyl mercaptan (also known as methanethiol), CH3SH, has been found in the warm and dense parts of high -- as well as low -- mass star-forming regions. The aim of the present study is to obtain accurate spectroscopic parameters of the S-deuterated m
Externí odkaz:
http://arxiv.org/abs/1812.02454
Autor:
Müller, H. S. P., Maeda, A., Thorwirth, S., Lewen, F., Schlemmer, S., Medvedev, I. R., Winnewisser, M., De Lucia, F. C., Herbst, E.
Publikováno v:
A&A 621, A143 (2019)
Thioformaldehyde is an abundant molecule in various regions of the interstellar medium. However, available laboratory data limit the accuracies of calculated transition frequencies in the submillimeter region, in particular for minor isotopic species
Externí odkaz:
http://arxiv.org/abs/1812.01554
Autor:
Beuther, H., Mottram, A. Ahmadi. J. C., Linz, H., Maud, L. T., Henning, Th., Kuiper, R., Walsh, A. J., Johnston, K. G., Longmore, S. N.
Publikováno v:
A&A 621, A122 (2019)
Methods: We observed the high-mass hot core region G351.77-0.54 with ALMA and more than 16km baselines. Results: At a spatial resolution of 18/40au (depending on the distance), we identify twelve sub-structures within the inner few thousand au of the
Externí odkaz:
http://arxiv.org/abs/1811.10245
Autor:
Juárez, Carmen, Liu, Hauyu-Baobab, Girart, Josep M., Palau, Aina, Busquet, Gemma, Galván-Madrid, Roberto, Hirano, Naomi, Lin, Yuxin
Publikováno v:
A&A 621, A140 (2019)
The filamentary infrared dark cloud L1287 is actively forming a dense cluster of low-mass YSOs at its inner $\sim$0.1 pc region. To help understand the origin of this low-mass YSO cluster, the present work aims at resolving the gas structures and kin
Externí odkaz:
http://arxiv.org/abs/1811.08517
Publikováno v:
A&A 621, L2 (2019)
Within a 200 pc sphere around the Sun we search for the Hyades tidal tails in the Gaia DR2 dataset. We use a modified convergent point method to search for stars with space velocities close to the space velocity of the Hyades cluster. We find a clear
Externí odkaz:
http://arxiv.org/abs/1811.03845
Publikováno v:
A&A 621, A14 (2019)
We aim to test a purely photometric approach to statistically identify a young clustered population embedded in a large population of field stars, with no prior knowledge on the nature of stars in the field. We conducted our blind test study on the N
Externí odkaz:
http://arxiv.org/abs/1811.02731