| ISOGAL: A deep survey of the obscured inner Milky Way with ISO at 7 μm and 15 μm and with DENIS in the near-infrared A Omont, GF Gilmore, C Alard, B Aracil, T August, K Baliyan, S Beaulieu, ... Astronomy & Astrophysics 403 (3), 975-992, 2003 | 105 | 2003 |
| A model of the Galaxy for predicting star counts in the infrared R Ortiz, JRD Lepine Astronomy and Astrophysics (ISSN 0004-6361), vol. 279, no. 1, p. 90-106 279 …, 1993 | 85 | 1993 |
| OH/IR stars: near-infrared photometry, and discussion of the Mira-OH/IR sequence. JRD Lépine, R Ortiz, N Epchtein Astronomy and Astrophysics, v. 299, p. 453 299, 453, 1995 | 66 | 1995 |
| OH/IR stars in the inner bulge detected by ISOGAL R Ortiz, J Blommaert, E Copet, S Ganesh, HJ Habing, M Messineo, ... Astronomy & Astrophysics 388 (1), 279-292, 2002 | 45 | 2002 |
| Evolution from AGB to planetary nebula in the MSX survey R Ortiz, S Lorenz-Martins, WJ Maciel, EM Rangel Astronomy & Astrophysics 431 (2), 565-574, 2005 | 38 | 2005 |
| Study of calcium oxalate monohydrate of kidney stones by X-ray diffraction MTD Orlando, L Kuplich, DO De Souza, H Belich, JB Depianti, ... Powder diffraction 23 (S1), S59-S64, 2008 | 35 | 2008 |
| Ultraviolet emission from main-sequence companions of AGB stars R Ortiz, MA Guerrero Monthly Notices of the Royal Astronomical Society 461 (3), 3036-3046, 2016 | 34 | 2016 |
| The rotation curve of the Galaxy obtained from planetary nebulae and AGB stars LH Amaral, R Ortiz, JRD Lépine, WJ Maciel Monthly Notices of the Royal Astronomical Society 281 (1), 339-347, 1996 | 34 | 1996 |
| DENIS and ISOGAL properties of variable star candidates in the Galactic Bulge M Schultheis, S Ganesh, IS Glass, A Omont, R Ortiz, G Simon, ... Astronomy and Astrophysics 362, 215-222, 2000 | 25 | 2000 |
| GEMINI near-infrared spectroscopic observations of young massive stars embedded in molecular clouds A Roman-Lopes, Z Abraham, R Ortiz, A Rodriguez-Ardila Monthly Notices of the Royal Astronomical Society 394 (1), 467-478, 2009 | 22 | 2009 |
| AGB stars: densities and formation rates obtained from OH/IR stars. R Ortiz, WJ Maciel Astronomy and Astrophysics, v. 313, p. 180-190 313, 180-190, 1996 | 17 | 1996 |
| Space Velocity and Time Span of Jets in Planetary Nebulae MA Guerrero, JS Rechy-García, R Ortiz The Astrophysical Journal 890 (1), 50, 2020 | 16 | 2020 |
| The OH/IR-planetary nebula connection: Space distribution and kinematics R Ortiz, WJ Maciel Astronomy and Astrophysics (ISSN 0004-6361), vol. 287, no. 2, p. 552-558 287 …, 1994 | 16 | 1994 |
| Ultraviolet and optical spectroscopy of AGB stars showing UV excess R Ortiz, MA Guerrero, RDD Costa Monthly Notices of the Royal Astronomical Society 482 (4), 4697-4712, 2019 | 15 | 2019 |
| A distance scale of planetary nebulae based on mid-infrared data R Ortiz, MVF Copetti, S Lorenz-Martins Monthly Notices of the Royal Astronomical Society 418 (3), 2004-2013, 2011 | 13 | 2011 |
| The young stellar cluster [DBS2003] 157 associated with the H ii region GAL 331.31−00.34 MC Pinheiro, Z Abraham, MVF Copetti, R Ortiz, DA Falceta-Gonçalves, ... Monthly Notices of the Royal Astronomical Society 423 (3), 2425-2435, 2012 | 12 | 2012 |
| A revised distance scale of planetary nebulae R Ortiz Astronomy & Astrophysics 560, A85, 2013 | 10 | 2013 |
| The young stellar cluster associated with IRAS 09149-4743 R Ortiz, A Roman-Lopes, Z Abraham Astronomy & Astrophysics 461 (3), 949-955, 2007 | 10 | 2007 |
| X-ray AGB Stars in the 4XMM-DR9 Catalog: Further Evidence for Companions R Ortiz, MA Guerrero The Astrophysical Journal 912 (2), 93, 2021 | 9 | 2021 |
| VIII Olimpíada Brasileira de Astronomia e Astronáutica JB Garcia Canalle, JF Villas da Rocha, CA Wuensche de Souza, ... Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol. 26, no. 3 …, 2007 | 8 | 2007 |
