High Angular Resolution Studies of the Structure and Evolution of Protoplanetary Disks
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
THE STAR FORMATION NEWSLETTER an Electronic Publication Dedicated to Early Stellar Evolution and Molecular Clouds
THE STAR FORMATION NEWSLETTER An electronic publication dedicated to early stellar evolution and molecular clouds No. 90 — 27 March 2000 Editor: Bo Reipurth ([email protected]) Abstracts of recently accepted papers The Formation and Fragmentation of Primordial Molecular Clouds Tom Abel1, Greg L. Bryan2 and Michael L. Norman3,4 1 Harvard Smithsonian Center for Astrophysics, MA, 02138 Cambridge, USA 2 Massachusetts Institute of Technology, MA, 02139 Cambridge, USA 3 LCA, NCSA, University of Illinois, 61801 Urbana/Champaign, USA 4 Astronomy Department, University of Illinois, Urbana/Champaign, USA E-mail contact: [email protected] Many questions in physical cosmology regarding the thermal history of the intergalactic medium, chemical enrichment, reionization, etc. are thought to be intimately related to the nature and evolution of pregalactic structure. In particular the efficiency of primordial star formation and the primordial IMF are of special interest. We present results from high resolution three–dimensional adaptive mesh refinement simulations that follow the collapse of primordial molecular clouds and their subsequent fragmentation within a cosmologically representative volume. Comoving scales from 128 kpc down to 1 pc are followed accurately. Dark matter dynamics, hydrodynamics and all relevant chemical and radiative processes (cooling) are followed self-consistently for a cluster normalized CDM structure formation model. Primordial molecular clouds with ∼ 105 solar masses are assembled by mergers of multiple objects that have formed −4 hydrogen molecules in the gas phase with a fractional abundance of ∼< 10 . As the subclumps merge cooling lowers the temperature to ∼ 200 K in a “cold pocket” at the center of the halo. Within this cold pocket, a quasi–hydrostatically > 5 −3 contracting core with mass ∼ 200M and number densities ∼ 10 cm is found. -
THE YOUNG ASTRONOMERS NEWSLETTER Volume 23 Number 6 STUDY + LEARN = POWER May 2015
THE YOUNG ASTRONOMERS NEWSLETTER Volume 23 Number 6 STUDY + LEARN = POWER May 2015 ****************************************************************************************************************************** AUSTRALIAN CRATER HIDDEN STARS A team of geophysicists has found the twin scars of Scientists found a bright nebula around the Milky the impacts of a huge meteorite that broke in two Way”s nearby star 48 Librae in a patch of sky that moments before it slammed into the Earth millions of appears totally black in visible light but appears in infra- years ago in central Australia. It is the largest impact red. They said: "This cluster is probably a group of very zone ever found on Earth – 400 kilometers wide. young stars forming inside a previously undiscovered “YELLOW BALLS” molecular cloud, and the 48 Librae nebula apparently is Citizen scientists recently found a new class of due to a huge cloud of dust around the star.” curiosities that had gone unrecognized before: yellow HUBBLE IS 25! balls. Many "citizen scientist" projects make up the Hubble, the first telescope to revolutionize modern Zooniverse website which relies on “crowd-sourcing” to astronomy and change our view of the universe by help process scientific data. offering glimpses of distant galaxies, has marked its 25th The rounded features are not actually yellow but year in space. A senior scientist said: "Hubble absolutely appear that way in the infrared images the telescope has changed the way humans look at the universe and sends to Earth. See: http://www.spxdaily.com/images- our place in it." lg/yellow-balls-process-star-formation-lg.jpg A DISTANT PLANET and http://www.zooniverse.org The Spitzer Space Telescope teamed up with CANADA’S NEW TMT TELESCOPE Poland’s OGLE telescope in Chile to find a remote gas Canada and an international partnership are funding planet about 13,000 light-years away, making it one of the construction of the Thirty Meter Telescope - the top the most distant planets known. -
New Mid-Infrared Imaging Constraints on Companions and Protoplanetary Disks Around Six Young Stars? D
Astronomy & Astrophysics manuscript no. main ©ESO 2021 February 26, 2021 New mid-infrared imaging constraints on companions and protoplanetary disks around six young stars? D. J. M. Petit dit de la Roche1, N. Oberg2, M. E. van den Ancker1, I. Kamp2, R. van Boekel3, D. Fedele4, V. D. Ivanov1, M. Kasper1, H. U. Käufl1, M. Kissler-Patig5, P. A. Miles-Páez1, E. Pantin6, S. P. Quanz7, Ch. Rab2; 8, R. Siebenmorgen1, and L. B. F. M. Waters9; 10 1 European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching, Germany e-mail: [email protected] 2 Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands 3 Max-Planck Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany 4 INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy 5 European Space Agency, Camino Bajo del Castillo, s/n., Urb. Villafranca del Castillo, 28692 Villanueva de la Cañada, Madrid, Spain 6 CEA, IRFU, DAp, AIM, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, CNRS, F-91191 Gif-sur-Yvette, France 7 Institute for Particle Physics and Astrophysics, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093 Zurich, Switzerland 8 Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse 1, 85748 Garching, Germany 9 Department of Astrophysics/IMAPP, Radboud University Nijmegen, P.O.Box 9010, 6500 GL Nijmegen, The Netherlands 10 SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands Received XXXX; accepted XXXX ABSTRACT Context. Mid-infrared (mid-IR) imaging traces the sub-micron and micron-sized dust grains in protoplanetary disks and it offers constraints on the geometrical properties of the disks and potential companions, particularly if those companions have circumplanetary disks. -
Exoplanet.Eu Catalog Page 1 # Name Mass Star Name
exoplanet.eu_catalog # name mass star_name star_distance star_mass OGLE-2016-BLG-1469L b 13.6 OGLE-2016-BLG-1469L 4500.0 0.048 11 Com b 19.4 11 Com 110.6 2.7 11 Oph b 21 11 Oph 145.0 0.0162 11 UMi b 10.5 11 UMi 119.5 1.8 14 And b 5.33 14 And 76.4 2.2 14 Her b 4.64 14 Her 18.1 0.9 16 Cyg B b 1.68 16 Cyg B 21.4 1.01 18 Del b 10.3 18 Del 73.1 2.3 1RXS 1609 b 14 1RXS1609 145.0 0.73 1SWASP J1407 b 20 1SWASP J1407 133.0 0.9 24 Sex b 1.99 24 Sex 74.8 1.54 24 Sex c 0.86 24 Sex 74.8 1.54 2M 0103-55 (AB) b 13 2M 0103-55 (AB) 47.2 0.4 2M 0122-24 b 20 2M 0122-24 36.0 0.4 2M 0219-39 b 13.9 2M 0219-39 39.4 0.11 2M 0441+23 b 7.5 2M 0441+23 140.0 0.02 2M 0746+20 b 30 2M 0746+20 12.2 0.12 2M 1207-39 24 2M 1207-39 52.4 0.025 2M 1207-39 b 4 2M 1207-39 52.4 0.025 2M 1938+46 b 1.9 2M 1938+46 0.6 2M 2140+16 b 20 2M 2140+16 25.0 0.08 2M 2206-20 b 30 2M 2206-20 26.7 0.13 2M 2236+4751 b 12.5 2M 2236+4751 63.0 0.6 2M J2126-81 b 13.3 TYC 9486-927-1 24.8 0.4 2MASS J11193254 AB 3.7 2MASS J11193254 AB 2MASS J1450-7841 A 40 2MASS J1450-7841 A 75.0 0.04 2MASS J1450-7841 B 40 2MASS J1450-7841 B 75.0 0.04 2MASS J2250+2325 b 30 2MASS J2250+2325 41.5 30 Ari B b 9.88 30 Ari B 39.4 1.22 38 Vir b 4.51 38 Vir 1.18 4 Uma b 7.1 4 Uma 78.5 1.234 42 Dra b 3.88 42 Dra 97.3 0.98 47 Uma b 2.53 47 Uma 14.0 1.03 47 Uma c 0.54 47 Uma 14.0 1.03 47 Uma d 1.64 47 Uma 14.0 1.03 51 Eri b 9.1 51 Eri 29.4 1.75 51 Peg b 0.47 51 Peg 14.7 1.11 55 Cnc b 0.84 55 Cnc 12.3 0.905 55 Cnc c 0.1784 55 Cnc 12.3 0.905 55 Cnc d 3.86 55 Cnc 12.3 0.905 55 Cnc e 0.02547 55 Cnc 12.3 0.905 55 Cnc f 0.1479 55 -
Chemical-Composition-Of-The-Circumstellar-Disk-Around-AB-Aurigae.Pdf (1.034Mb)
Astronomy & Astrophysics manuscript no. AB_Aur_final c ESO 2015 May 12, 2015 Chemical composition of the circumstellar disk around AB Aurigae S. Pacheco-Vázquez1 , A. Fuente1, M. Agúndez2, C. Pinte6, 7, T. Alonso-Albi1, R. Neri3, J. Cernicharo2,J. R. Goicoechea2, O. Berné4, 5, L. Wiesenfeld6, R. Bachiller1, and B. Lefloch6 1 Observatorio Astronómico Nacional (OAN), Apdo 112, E-28803 Alcalá de Henares, Madrid, Spain e-mail: [email protected], [email protected] 2 Instituto de Ciencia de Materiales de Madrid, ICMM-CSIC, C/ Sor Juana Inés de la Cruz 3, E-28049 Cantoblanco, Spain e-mail: [email protected] 3 Institut de Radioastronomie Millimétrique, 300 Rue de la Piscine, F-38406 Saint Martin d’Hères, France 4 Université de Toulouse, UPS-OMP, IRAP, Toulouse, France 5 CNRS, IRAP, 9 Av. colonel Roche, BP 44346, F-31028 Toulouse cedex 4, France 6 Institut de Planétologie et d’Astrophysique de Grenoble (IPAG) UMR 5274, Université UJF-Grenoble 1/CNRS-INSU, F-38041 Grenoble, France 7 UMI-FCA, CNRS/INSU, France (UMI 3386), and Dept. de Astronomía, Universidad de Chile, Santiago, Chile e-mail: [email protected] Received September 15, 1996; accepted March 16, 1997 ABSTRACT Aims. Our goal is to determine the molecular composition of the circumstellar disk around AB Aurigae (hereafter, AB Aur). AB Aur is a prototypical Herbig Ae star and the understanding of its disk chemistry is paramount for understanding the chemical evolution of the gas in warm disks. Methods. We used the IRAM 30-m telescope to perform a sensitive search for molecular lines in AB Aur as part of the IRAM Large program ASAI (A Chemical Survey of Sun-like Star-forming Regions). -
Ring Structure in the MWC 480 Disk Revealed by ALMA? Yao Liu1,2, Giovanni Dipierro3, Enrico Ragusa4, Giuseppe Lodato4, Gregory J
A&A 622, A75 (2019) Astronomy https://doi.org/10.1051/0004-6361/201834157 & © ESO 2019 Astrophysics Ring structure in the MWC 480 disk revealed by ALMA? Yao Liu1,2, Giovanni Dipierro3, Enrico Ragusa4, Giuseppe Lodato4, Gregory J. Herczeg5, Feng Long5, Daniel Harsono6, Yann Boehler7,8, Francois Menard8, Doug Johnstone9,10, Ilaria Pascucci11,12, Paola Pinilla13, Colette Salyk14, Gerrit van der Plas8, Sylvie Cabrit8,15, William J. Fischer16, Nathan Hendler11, Carlo F. Manara17, Brunella Nisini18, Elisabetta Rigliaco19, Henning Avenhaus1, Andrea Banzatti11, and Michael Gully-Santiago20 1 Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany 2 Purple Mountain Observatory & Key Laboratory for Radio Astronomy, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing 210008, PR China e-mail: [email protected] 3 Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK 4 Dipartimento di Fisica, Universita` Degli Studi di Milano, Via Celoria, 16, Milano, 20133, Italy 5 Kavli Institute for Astronomy and Astrophysics, Peking University, Yiheyuan 5, Haidian Qu, 100871 Beijing, PR China 6 Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands 7 Rice University, Department of Physics and Astronomy, Main Street, 77005 Houston, USA 8 Université Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France 9 NRC Herzberg Astronomy and Astrophysics, 5071 West Saanich Road, Victoria, BC, V9E 2E7, Canada 10 Department of Physics and Astronomy, University of Victoria, Victoria, BC, V8P 5C2, Canada -
Arxiv:1101.3707V1 [Astro-Ph.SR] 19 Jan 2011 E Eg,Cretre L 09 Ee 09.Tesignature the Pro 2009)
Astronomy & Astrophysics manuscript no. 15622 c ESO 2011 January 20, 2011 Searching for gas emission lines in Spitzer Infrared Spectrograph (IRS) spectra of young stars in Taurus Baldovin-Saavedra, C.1,2, Audard, M.1,2, G¨udel, M.3, Rebull, L. M.4, Padgett, D. L.4, Skinner, S. L.5, Carmona, A.1,2, Glauser, A. M.6,7, and Fajardo-Acosta, S. B.8 1 ISDC Data Centre for Astrophysics, Universit´ede Gen`eve, 16 Chemin d’Ecogia, CH-1290 Versoix, Switzerland 2 Observatoire Astronomique de l’Universit´ede Gen`eve, 51 Chemin de Maillettes, CH-1290 Sauverny, Switzerland 3 University of Vienna, Department of Astronomy, T¨urkenschanzstrasse 17, A-1180 Vienna, Austria 4 Spitzer Science Center, California Institute of Technology, 220-6 1200 East California Boulevard, Pasadena, CA 91125 USA 5 Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, CO 80309-0389, USA 6 ETH Z¨urich, 27 Wolfgang-Pauli-Str., CH-8093 Z¨urich, Switzerland 7 UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, EH3 9HJ Edinburgh, UK 8 IPAC, California Institute of Technology, 770 South Wilson Avenue, Pasadena, CA 91125, USA Received August 2010; accepted January 2011 ABSTRACT Context. Our knowledge of circumstellar disks has traditionally been based on studies of dust. However, gas dominates the disk mass and its study is key to our understanding of accretion, outflows, and ultimately planet formation. The Spitzer Space Telescope provides access to gas emission lines in the mid-infrared, providing crucial new diagnostics of the physical conditions in accretion disks and outflows. Aims. We seek to identify gas emission lines in mid-infrared spectra of 64 pre-main-sequence stars in Taurus. -
GIARPS High-Resolution Observations of T Tauri Stars (Ghost). II
Astronomy & Astrophysics manuscript no. 38534corr c ESO 2020 August 6, 2020 GIARPS High-resolution Observations of T Tauri stars (GHOsT) II. Connecting atomic and molecular winds in protoplanetary disks Gangi, M.1, Nisini, B.1, Antoniucci, S.1, Giannini, T.1, Biazzo, K.1, Alcalá, J. M.2, Frasca, A.3, Munari, U.4, Arkharov, A. A.5, Harutyunyan, A.6, Manara, C.F.7, Rigliaco, E.8, and Vitali, F.1 1 INAF - Osservatorio Astronomico di Roma - Via Frascati 33, 00078 Monte Porzio Catone, Italy e-mail: [email protected] 2 INAF - Osservatorio Astronomico di Capodimonte - Salita Moiariello 16, 80131 Napoli, Italy 3 INAF - Osservatorio Astrofisico di Catania - Via S. Sofia 78, 95123 Catania, Italy 4 INAF–Osservatorio Astronomico di Padova, via dell’Osservatorio 8, 36012 Asiago (VI), Italy 5 Central Astronomical Observatory of Pulkovo, Pulkovskoe shosse 65, 196140 St. Petersburg, Russia 6 Fundación Galileo Galilei - INAF - Telescopio Nazionale Galileo, 38700 Brena˜ Baja, Santa Cruz de Tenerife, Spain 7 European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany 8 INAF–Osservatorio Astronomico di Padova, vicolo dell’ Osservatorio 5, 35122, Padova, Italy Received Month XX, XXXX; accepted Month XX, XXXX ABSTRACT Aims. In the framework of the GIARPS High-resolution Observations of T Tauri stars (GHOsT) project, we aim to characterize the atomic and molecular winds in a sample of classical T Tauri stars (CTTs) of the Taurus-Auriga region. Methods. We analyzed the flux calibrated [O i] 630 nm and H2 2.12 µm lines in a sample of 36 CTTs observed at the Telescopio Nazionale Galileo with the HARPS and GIANO spectrographs. -
Determination of Stellar Parameters for M-Dwarf Stars: the NIR Approach
Determination of stellar parameters for M-dwarf stars: the NIR approach by Daniel Thaagaard Andreasen A thesis submitted in conformity with the requirements for the degree of Doctor of Philosophy Graduate Department of Departamento de Fisica e Astronomia University of Porto c Copyright 2017 by Daniel Thaagaard Andreasen Dedication To Linnea, Henriette, Rico, and Else For always supporting me ii Acknowledgements When doing a PhD it is important to remember it is more a team effort than the work of an individual. This is something I learned quickly during the last four years. Therefore there are several people I would like to thank. First and most importantly are my two supervisors, Sérgio and Nuno. They were after me in the beginning of my studies because I was too shy to ask for help; something that I quickly learned I needed to do. They always had their door open for me and all my small questions. It goes without saying that I am thankful for all their guidance during my studies. However, what I am most thankful for is the freedom I have had to explorer paths and ideas on my own, and with them safely on the sideline. This sometimes led to failures and dead ends, but it make me grow as a researcher both by learning from my mistake, but also by prioritising my time. When I thank Sérgio and Nuno, my official supervisors, I also have to thank Elisa. She has been my third unofficial supervisor almost from the first day. Although she did not have any experience with NIR spectroscopy, she was never afraid of giving her opinion and trying to help. -
Voided Certificate of Employee Information Reports
Public Contracts Equal Employment Opportunity Compliance Monitoring Program Voided Certificate of Employee Information Report Report run on: June 6, 2017 3:22 PM Name of Company Cert Street City State Zip (PC) 2 HD 37407 245 EAST 30TH NEW YORK CITY NY 10016 1515 BOARDWALK, INC 18317 121 WASHINGTON ST TOMS RIVER NJ 08753 174 NEWARK AVENUE ASSOCIATES, LP 34742 103 EISENHOWER PARKWAY ROSELAND NJ 07068 1993-N2 PROPERTIES, NO. 3 LIMITED PARTNERSHI 19621 12100 WILSHIRE BLVD LOS ANGELES CA 90025 1ST CALL PAINTING CONTRACTORS, LLC 37000 980-B DEHART PLACE ELIZABETH NJ 07202 3-2-1 QUALITY PRINTING 21779 100 JERSEY AVENUE NEW BRUNSWICK NJ 08901 3-D MFG.-DBA- AMERICAN LA-FRANCE 2831 500 S. AIRPORT ROAD SHAWANO WI 54166 4 FRONT VIDEO DESIGN INC. 22299 1500 BROADWAY #509 NEW YORK NY 10036 55 WASHINGTON STREET LLC 28132 P.O. BOX 66 CLOSTER NJ 07624 9-15 SOUTH MAIN STREET CORP. 20587 1125 ATLANTIC AVE., SUITE 617 ATLANTIC CITY NJ 08401 A & A ENGINEERING 9780 300 CORPORATE CENTER DRIVE MANALAPAN NJ 07726 A & B WIPER SUPPLY, INC. 6848 116 FOUNTAIN ST. PHILADELPHIA PA 19127 A & E CARPENTRY, INC. 8048 584 STUDIO RD. RIDGEFIELD NJ 07657 A & L UNIFORMS, L L C 37818 2605 SOUTH BROAD STREET TRENTON NJ 08610 A & P TUTORING, LLC 34701 4201 CHURCH ROAD #242 MT. LAUREL NJ 08054 A & R AUTO SUPPLY, INC. 7169 300 ATLANTIC CITY BLVD. TOMS RIVER NJ 08757 A & S FUEL OIL CO. INC. 25667 95 CALAIS ROAD PO BOX 22 IRONIA NJ 07845 A & W TECHNICAL SALES, INC. 33404 420 COMMERCE LANE, SUITE 3 WEST BERLIN NJ 08091 A AND C LABORATORIES, INC 17387 168 W. -
Exoplanet.Eu Catalog Page 1 Star Distance Star Name Star Mass
exoplanet.eu_catalog star_distance star_name star_mass Planet name mass 1.3 Proxima Centauri 0.120 Proxima Cen b 0.004 1.3 alpha Cen B 0.934 alf Cen B b 0.004 2.3 WISE 0855-0714 WISE 0855-0714 6.000 2.6 Lalande 21185 0.460 Lalande 21185 b 0.012 3.2 eps Eridani 0.830 eps Eridani b 3.090 3.4 Ross 128 0.168 Ross 128 b 0.004 3.6 GJ 15 A 0.375 GJ 15 A b 0.017 3.6 YZ Cet 0.130 YZ Cet d 0.004 3.6 YZ Cet 0.130 YZ Cet c 0.003 3.6 YZ Cet 0.130 YZ Cet b 0.002 3.6 eps Ind A 0.762 eps Ind A b 2.710 3.7 tau Cet 0.783 tau Cet e 0.012 3.7 tau Cet 0.783 tau Cet f 0.012 3.7 tau Cet 0.783 tau Cet h 0.006 3.7 tau Cet 0.783 tau Cet g 0.006 3.8 GJ 273 0.290 GJ 273 b 0.009 3.8 GJ 273 0.290 GJ 273 c 0.004 3.9 Kapteyn's 0.281 Kapteyn's c 0.022 3.9 Kapteyn's 0.281 Kapteyn's b 0.015 4.3 Wolf 1061 0.250 Wolf 1061 d 0.024 4.3 Wolf 1061 0.250 Wolf 1061 c 0.011 4.3 Wolf 1061 0.250 Wolf 1061 b 0.006 4.5 GJ 687 0.413 GJ 687 b 0.058 4.5 GJ 674 0.350 GJ 674 b 0.040 4.7 GJ 876 0.334 GJ 876 b 1.938 4.7 GJ 876 0.334 GJ 876 c 0.856 4.7 GJ 876 0.334 GJ 876 e 0.045 4.7 GJ 876 0.334 GJ 876 d 0.022 4.9 GJ 832 0.450 GJ 832 b 0.689 4.9 GJ 832 0.450 GJ 832 c 0.016 5.9 GJ 570 ABC 0.802 GJ 570 D 42.500 6.0 SIMP0136+0933 SIMP0136+0933 12.700 6.1 HD 20794 0.813 HD 20794 e 0.015 6.1 HD 20794 0.813 HD 20794 d 0.011 6.1 HD 20794 0.813 HD 20794 b 0.009 6.2 GJ 581 0.310 GJ 581 b 0.050 6.2 GJ 581 0.310 GJ 581 c 0.017 6.2 GJ 581 0.310 GJ 581 e 0.006 6.5 GJ 625 0.300 GJ 625 b 0.010 6.6 HD 219134 HD 219134 h 0.280 6.6 HD 219134 HD 219134 e 0.200 6.6 HD 219134 HD 219134 d 0.067 6.6 HD 219134 HD -
Searching for Gas Emission Lines in Spitzer Infrared Spectrograph \(IRS
A&A 528, A22 (2011) Astronomy DOI: 10.1051/0004-6361/201015622 & c ESO 2011 Astrophysics Searching for gas emission lines in Spitzer Infrared Spectrograph (IRS) spectra of young stars in Taurus C. Baldovin-Saavedra1,2, M. Audard1,2, M. Güdel3,L.M.Rebull4,D.L.Padgett4, S. L. Skinner5, A. Carmona1,2,A.M.Glauser6,7, and S. B. Fajardo-Acosta8 1 ISDC Data Centre for Astrophysics, Université de Genève, 16 chemin d’Ecogia, 1290 Versoix, Switzerland e-mail: [email protected] 2 Observatoire Astronomique de l’Université de Genève, 51 chemin de Maillettes, 1290 Sauverny, Switzerland 3 University of Vienna, Department of Astronomy, Türkenschanzstrasse 17, 1180 Vienna, Austria 4 Spitzer Science Center, California Institute of Technology, 220-6 1200 East California Boulevard, CA 91125 Pasadena, USA 5 Center for Astrophysics and Space Astronomy, University of Colorado, CO 80309-0389 Boulder, USA 6 ETH Zürich, 27 Wolfgang-Pauli-Str., 8093 Zürich, Switzerland 7 UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, EH3 9HJ Edinburgh, UK 8 IPAC, California Institute of Technology, 770 South Wilson Avenue, CA 91125 Pasadena, USA Received 19 August 2010 / Accepted 14 January 2011 ABSTRACT Context. Our knowledge of circumstellar disks has traditionally been based on studies of dust. However, gas dominates the disk mass and its study is key to our understanding of accretion, outflows, and ultimately planet formation. The Spitzer Space Telescope provides access to gas emission lines in the mid-infrared, providing crucial new diagnostics of the physical conditions in accretion disks and outflows. Aims. We seek to identify gas emission lines in mid-infrared spectra of 64 pre-main-sequence stars in Taurus.