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Reich, W.; Gao, X.; Reich, P.: Radio properties of the optically identified supernova remnant G107.0+9.0. åp 655, A10, p. A10 (2021)

Rhodes, L.; Fender, R.; Williams, D. R.A.; Mooley, K.: An early peak in the radio light curve of short-duration gamma-ray burst 200826A. \mnras 503 (2), pp. 2966 - 2972 (2021)

Richter, H.; Buchbender, C.; Güsten, R.; Higgins, R.; Klein, B.; Stutzki, J.; Wiesemeyer, H.; Hübers, H.-W.: Direct measurements of atomic oxygen in the mesosphere and lower thermosphere using terahertz heterodyne spectroscopy. Communications Earth and Environment 2 (1), 19, p. 19 (2021)

Ridolfi, A.; Gautam, T.; Freire, P.C.C.; Ransom, S.M.; Buchner, S.J.; Possenti, A.; Venkatraman Krishnan, V.; Bailes, M.; Kramer, M.; Stappers, B.W. et al.; Abbate, F.; Barr, E.D.; Burgay, M.; Camilo, F.; Corongiu, A.; Jameson, A.; Padmanabh, P.V.; Vleeschower, L.; Champion, D.J.; Chen, W.; Geyer, M.; Karastergiou, A.; Karuppusamy, R.; Parthasarathy, A.; Reardon, D.J.; Serylak, M.; Shannon, R.M.; Spiewak, R.: Eight new millisecond pulsars from the first MeerKAT globular cluster census. \mnras 504 (1), pp. 1407 - 1426 (2021)

Riley, T. E.; Watts, A. L.; Ray, P. S.; Bogdanov, S.; Guillot, S.; Morsink, S. M.; Bilous, A. V.; Arzoumanian, Z.; Choudhury, D.; Deneva, J. S. et al.; Gendreau, K. C.; Harding, A. K.; Ho, W. C.G.; Lattimer, J. M.; Loewenstein, M.; Ludlam, R. M.; Markwardt, C. B.; Okajima, T.; Prescod-Weinstein, C.; Remillard, R. A.; Wolff, M. T.; Fonseca, E.; Cromartie, H. T.; Kerr, M.; Pennucci, T. T.; Parthasarathy, A.; Ransom, S.; Stairs, I.; Guillemot, L.; Cognard, I.: A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy. \apjl 918 (2), L27, p. L27 (2021)

Rodríguez-Coira, G.; Paumard, T.; Perrin, G.; Vincent, F.; Abuter, R.; Amorim, A.; Bauböck, M.; Berger, J.P.; Bonnet, H.; Brandner, W. et al.; Clénet, Y.; de Zeeuw, P.T.; Dexter, J.; Drescher, A.; Eckart, A.; Eisenhauer, F.; Förster Schreiber, N.M.; Gao, F.; Garcia, P.; Gendron, E.; Genzel, R.; Gillessen, S.; Habibi, M.; Haubois, X.; Henning, T.; Hippler, S.; Horrobin, M.; Jimenez-Rosales, A.; Jochum, L.; Jocou, L.; Kaufer, A.; Kervella, P.; Lacour, S.; Lapeyrère, V.; Le Bouquin, J.B.; Léna, P.; Nowak, M.; Ott, T.; Perraut, K.; Pfuhl, O.; Sanchez-Bermudez, J.; Shangguan, J.; Scheithauer, S.; Stadler, J.; Straub, O.; Straubmeier, C.; Sturm, E.; Tacconi, L.J.; Shimizu, T.; von Fellenberg, S.; Waisberg, I.; Widmann, F.; Wieprecht, E.; Wiezorrek, E.; Woillez, J.; Yazici, S.; Zins, G.; Gravity Collaboration: MOLsphere and pulsations of the Galactic Center's red supergiant GCIRS 7 from VLTI/GRAVITY. åp 651, A37, p. A37 (2021)

Roelofs, F.; Fromm, C. M.; Mizuno, Y.; Davelaar, J.; Janssen, M.; Younsi, Z.; Rezzolla, L.; Falcke, H.: Black hole parameter estimation with synthetic very long baseline interferometry data from the ground and from space. åp 650, A56, p. A56 (2021)

Roshan, M.; Ghafourian, N.; Kashfi, T.; Banik, I.; Haslbauer, M.; Cuomo, V.; Famaey, B.; Kroupa, P.: Fast galaxy bars continue to challenge standard cosmology. \mnras 508 (1), pp. 926 - 939 (2021)

Rotermund, K.M.; Chapman, S.C.; Phadke, K.A.; Hill, R.; Pass, E.; Aravena, M.; Ashby, M.L.N.; Babul, A.; Béthermin, M.; Canning, R. et al.; de Breuck, C.; Dong, C.; Gonzalez, A.H.; Hayward, C.C.; Jarugula, S.; Marrone, D.P.; Narayanan, D.; Reuter, C.; Scott, D.; Spilker, J.S.; Vieira, J.D.; Wang, G.; Weiss, A.: Optical and near-infrared observations of the SPT2349-56 proto-cluster core at z = 4.3. \mnras 502 (2), pp. 1797 - 1815 (2021)

Sabatini, G.; Bovino, S.; Giannetti, A.; Grassi, T.; Brand, J.; Schisano, E.; Wyrowski, F.; Leurini, S.; Menten, K.M.: Establishing the evolutionary timescales of the massive star formation process through chemistry. åp 652, A71, p. A71 (2021)

Said, N.M.M.; Ellingsen, S.P.; Liu, J.; McCallum, J.N.; Bignall, H.E.; Shabala, S.; Reynolds, C.: Changing modality behaviour in the radio light curve of blazar PKS B1144 - 379. \mnras 506 (1), pp. 288 - 297 (2021)

Salas, P.; Rugel, M.R.; Emig, K.L.; Kauffmann, J.; Menten, K.M.; Wyrowski, F.; Tielens, A.G.G.M.: The ionization fraction in OMC-2 and OMC-3. åp 653, A102, p. A102 (2021)

Salomé, Q.; Longinotti, A.L.; Krongold, Y.; Feruglio, C.; Chavushyan, V.; Vega, O.; García-Burillo, S.; Fuente, A.; Olguín-Iglesias, A.; Patiño-Álvarez, V.M. et al.; Puerari, I.; Robleto-Orús, A.: Evidence of galaxy interaction in the narrow-line Seyfert 1 galaxy IRAS 17020+4544 seen by NOEMA. \mnras 501 (1), pp. 219 - 228 (2021)

Sánchez, S.F.; Barrera-Ballesteros, J.K.; Colombo, D.; Wong, T.; Bolatto, A.; Rosolowsky, E.; Vogel, S.; Levy, R.; Kalinova, V.; Alvarez-Hurtado, P. et al.; Luo, Y.; Cao, Y.: The EDGE-CALIFA survey: the local and global relations between Σ*, ΣSFR, and Σmol that regulate star formation. \mnras 503 (2), pp. 1615 - 1635 (2021)

Sanna, A.; Giannetti, A.; Bonfand, M.; Moscadelli, L.; Kuiper, R.; Brand, J.; Cesaroni, R.; Caratti o Garatti, A.; Pillai, T.; Menten, K.M.: Physical conditions in the warped accretion disk of a massive star. 349 GHz ALMA observations of G023.01-00.41. åp 655, A72, p. A72 (2021)

Schneider, N.; Röllig, M.; Polehampton, E.T.; Comerón, F.; Djupvik, A.A.; Makai, Z.; Buchbender, C.; Simon, R.; Bontemps, S.; Güsten, R. et al.; White, G.; Okada, Y.; Parikka, A.; Rothbart, N.: Globules and pillars in Cygnus X. III. Herschel and upGREAT/SOFIA far-infrared spectroscopy of the globule IRAS 20319+3958 in Cygnus X. åp 653, A108, p. A108 (2021)

Scholten, O.; Hare, B.M.; Dwyer, J.; Liu, N.; Sterpka, C.; Kolmašová, I.; Santolík, O.; Lán, R.; Uhlíř, L.; Buitink, S. et al.; Corstanje, A.; Falcke, H.; Huege, T.; Hörandel, J.R.; Krampah, G.K.; Mitra, P.; Mulrey, K.; Nelles, A.; Pandya, H.; Rachen, J.P.; Trinh, T.N.G.; ter Veen, S.; Thoudam, S.; Winchen, T.: A distinct negative leader propagation mode. Scientific Reports 11, 16256, p. 16256 (2021)

Schootemeijer, A.; Langer, N.; Lennon, D.; Evans, C.J.; Crowther, P.A.; Geen, S.; Howarth, I.; de Koter, A.; Menten, K.M.; Vink, J.S.: A dearth of young and bright massive stars in the Small Magellanic Cloud. åp 646, A106, p. A106 (2021)

Schuller, F.; Urquhart, J.S.; Csengeri, T.; Colombo, D.; Duarte-Cabral, A.; Mattern, M.; Ginsburg, A.; Pettitt, A.R.; Wyrowski, F.; Anderson, L. et al.; Azagra, F.; Barnes, P.; Beltran, M.; Beuther, H.; Billington, S.; Bronfman, L.; Cesaroni, R.; Dobbs, C.; Eden, D.; Lee, M.-Y.; Medina, S.-N.X.; Menten, K.M.; Moore, T.; Montenegro-Montes, F.M.; Ragan, S.; Rigby, A.; Riener, M.; Russeil, D.; Schisano, E.; Sanchez-Monge, A.; Traficante, A.; Zavagno, A.; Agurto, C.; Bontemps, S.; Finger, R.; Giannetti, A.; Gonzalez, E.; Hernandez, A.K.; Henning, T.; Kainulainen, J.; Kauffmann, J.; Leurini, S.; Lopez, S.; Mac-Auliffe, F.; Mazumdar, P.; Molinari, S.; Motte, F.; Muller, E.; Nguyen-Luong, Q.; Parra, R.; Perez-Beaupuits, J.-P.; Schilke, P.; Schneider, N.; Suri, S.; Testi, L.; Torstensson, K.; Veena, V.S.; Venegas, P.; Wang, K.; Wienen, M.: The SEDIGISM survey: First Data Release and overview of the Galactic structure. \mnras 500 (3), pp. 3064 - 3082 (2021)