Acuña, M.H., Connerney, J.E.P., Wasilewski, P., Lin, R.P., Anderson, K.A., Carlson, C.W., McFadden, J., Curtis, D.W., Mitchell, D., Reme, H., Mazelle, C., Sauvaud, J.A., D’Uston, C., Cros, A., Medale, J.L., Bauer, S.J., Cloutier, P., Mayhew, M., Winterhalter, D., Ness, N.F., 1998, “Magnetic Field and Plasma Observations at Mars: Initial Results of the Mars Global Surveyor Mission”, Science, 279, 1676–1680.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1998Sci...279.1676A
Alexander, R.D., Clarke, C.J., Pringle, J.E., 2004, “The effects of X-ray photoionization and heating on the structure of circumstellar discs”, Mon. Not. R. Astron. Soc., 354, 71–80.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2004MNRAS.354...71A
Alexander, R.D., Clarke, C.J., Pringle, J.E., 2006a, “Photoevaporation of protoplanetary discs - I. Hydrodynamic models”, Mon. Not. R. Astron. Soc., 369, 216–228.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2006MNRAS.369..216A
Alexander, R.D., Clarke, C.J., Pringle, J.E., 2006b, “Photoevaporation of protoplanetary discs - II. Evolutionary models and observable properties”, Mon. Not. R. Astron. Soc., 369, 229–239.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2006MNRAS.369..229A
Ambartsumian, V.A., Mirzoyan, L.V., 1982, “An observational approach to the early stages of stellar evolution”, Astrophys. Space Sci., 84, 317–330.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1982Ap%26SS..84..317A
André, P., Montmerle, T., Feigelson, E.D., 1987, “A VLA survey of radio-emitting young stars in the ρ Ophiuchi dark cloud”, Astron. J., 93, 1182–1198.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1987AJ.....93.1182A
André, P., Deeney, B.D., Phillips, R.B., Lestrade, J.-F., 1992, “VLBI survey of ρ Ophiuchi: A population of magnetized, diskless young stellar objects”, Astrophys. J., 401, 667–677.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1992ApJ...401..667A
Anglada, G., 1995, “Centimeter Continuum Emission from Outflow Sources”, in Circumstellar Disks, Outflows and Star Formation, (Eds.) Lizano, S., Torrelles, J.M., Circumstellar Disks, Outflows and Star Formation, Cozumel, Mexico, Nov 28-Dec 2, 1994, vol. 1 of Revista Mexicana de Astronomia y Astrofisica Serie de Conferencias, pp. 67–76, UNAM, Mexico D.F., Mexico.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1995RMxAC...1...67A
Anglada, G., Villuendas, E., Estalella, R., Beltrán, M.T., Rodríguez, L.F., Torrelles, J.M., Curiel, S., 1998, “Spectral Indices of Centimeter Continuum Sources in Star-forming Regions: Implications on the Nature of the Outflow Exciting Sources”, Astron. J., 116, 2953–2964.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1998AJ....116.2953A
Antia, H.M., Basu, S., 2005, “The Discrepancy between Solar Abundances and Helioseismology”, Astrophys. Lett., 620, L129–L132.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2005ApJ...620L.129A
Ardila, D.R., Basri, G., Walter, F.M., Valenti, J.A., Johns-Krull, C.M., 2002, “Observations of T Tauri Stars using Hubble Space Telescope GHRS. I. Far-Ultraviolet Emission Lines”, Astrophys. J., 566, 1100–1123.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2002ApJ...566.1100A
Argiroffi, C., Maggio, A., Peres, G., Stelzer, B., Neuhäuser, R., 2005, “XMM-Newton spectroscopy of the metal depleted T Tauri star TWA 5”, Astron. Astrophys., 439, 1149–1158.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2005A%26A...439.1149A
Argiroffi, C., Maggio, A., Peres, G., 2007, “X-ray emission from MP Muscae: an old classical T Tauri star”, Astron. Astrophys., 465, L5–L8.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2007A%26A...465L...5A
Arnaud, K.A., 1996, “XSPEC: The First Ten Years”, in Astronomical Data Analysis Software and Systems V , (Eds.) Jacoby, G.H., Barnes, J., vol. 101 of ASP Conference Series, pp. 17–20, Astronomical Society of the Pacific, San Francisco, U.S.A.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1996ASPC..101...17A
Arzner, K., Güdel, M., 2004, “Are Coronae of Magnetically Active Stars Heated by Flares? III. Analytical Distribution of Superposed Flares”, Astrophys. J., 602, 363–376.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2004ApJ...602..363A
Arzner, K., Güdel, M., Briggs, K., Telleschi, A., Audard, M., 2007, “Statistics of superimposed flares in the Taurus molecular cloud”, Astron. Astrophys., 468, 477–484.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2007A%26A...468..477A
Asplund, M., Grevesse, N., Güdel, M., Sauval, A.J., 2005a, “The solar model problem resurrected”, Nature, 436, 525–528.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2005astro.ph.10377A
Asplund, M., Grevesse, N., Sauval, A.J., 2005b, “The Solar Chemical Composition”, in Cosmic Abundance as Records of Stellar Evolution and Nucleosynthesis in honor of David L. Lambert, (Eds.) Barnes III, T.G., Bash, F.N., Symposium held 17 – 19 June, 2004 in Austin, Texas, vol. 336 of ASP Conference Series, pp. 25–38, Astronomical Society of the Pacific, San Francisco, U.S.A.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2005ASPC..336...25A
Audard, M., Güdel, M., Guinan, E.F., 1999, “Implications from Extreme-Ultraviolet Observations for Coronal Heating of Active Stars”, Astrophys. J. Lett., 513, L53–L56.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1999ApJ...513L..53A
Audard, M., Güdel, M., Drake, J.J., Kashyap, V.L., 2000, “Extreme-Ultraviolet Flare Activity in Late-Type Stars”, Astrophys. J., 541, 396–409.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2000ApJ...541..396A
Audard, M., Güdel, M., Skinner, S.L., 2003a, “Separating the X-Ray Emissions of UV Ceti A and B with Chandra”, Astrophys. J., 589, 983–987.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2003ApJ...589..983A
Audard, M., Güdel, M., Sres, A., Raassen, A.J.J., Mewe, R., 2003b, “A study of coronal abundances in RS CVn binaries”, Astron. Astrophys., 398, 1137–1149.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2003A%26A...398.1137A
Ayres, T.R., 1997, “Evolution of the solar ionizing flux”, J. Geophys. Res., 102, 1641–1652.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1997JGR...102.1641A
Ayres, T.R., Linsky, J.L., 1980, “Outer atmospheres of cool stars. V. IUE observations of Capella: The rotation-activity connection”, Astrophys. J., 241, 279–299.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1980ApJ...241..279A
Balbus, S.A., Hawley, J.F., 1991, “A powerful local shear instability in weakly magnetized disks. I - Linear analysis. II - Nonlinear evolution”, Astrophys. J., 376, 214–233.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1991ApJ...376..214B
Baliunas, S.L., Donahue, R.A., Soon, W.H., Horne, J.H., Frazer, J., Woodard-Eklund, L., Bradford, M., Rao, L.M., Wilson, O.C., Zhang, Q., Bennett, W., Briggs, J., Carroll, S.M., Duncan, D.K., Figueroa, D., Lanning, H.H., Misch, T., Mueller, J., Noyes, R.W., Poppe, D., Porter, A.C., Robinson, C.R., Russell, J., Shelton, J.C., Soyumer, T., Vaughan, A.H., Whitney, J.H., 1995, “Chromospheric variations in main-sequence stars. II”, Astrophys. J., 438, 269–287.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1995ApJ...438..269B
Barnes, J.R., Collier Cameron, A., Unruh, Y.C., Donati, J.F., Hussain, G.A.J., 1998, “Latitude distributions and lifetimes of star-spots on G dwarfs in the α Persei cluster”, Mon. Not. R. Astron. Soc., 299, 904–920.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1998MNRAS.299..904B
Bary, J.S., Weintraub, D.A., Kastner, J.H., 2003, “Detections of Rovibrational H2 Emission from the Disks of T Tauri Stars”, Astrophys. J., 586, 1136–1147.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2003ApJ...586.1136B
Basri, G., Bertout, C., 1989, “Accretion disks around T Tauri stars. II - Balmer emission”, Astrophys. J., 341, 340–358.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1989ApJ...341..340B
Benz, A.O., Güdel, M., 1994, “X-ray/microwave ratio of flares and coronae”, Astron. Astrophys., 285, 621–630.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1994A%26A...285..621B
Benz, A.O., Conway, J., Güdel, M., 1998, “First VLBI images of a main-sequence star”, Astron. Astrophys., 331, 596–600.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1998A%26A...331..596B
Berdyugina, S.V., Pelt, J., Tuominen, I., 2002, “Magnetic activity in the young solar analog LQ Hydrae. I. Active longitudes and cycles”, Astron. Astrophys., 394, 505–515.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2002A%26A...394..505B
Bergin, E., Calvet, N., D’Alessio, P., Herczeg, G.J., 2003, “The Effects of UV Continuum and Lyα Radiation on the Chemical Equilibrium of T Tauri Disks”, Astrophys. J. Lett., 591, L159–L162.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2003ApJ...591L.159B
Bertout, C., 1989, “T Tauri stars - Wild as dust”, Annu. Rev. Astron. Astrophys., 27, 351–395.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1989ARA%26A..27..351B
Bertout, C., Basri, G., Bouvier, J., 1988, “Accretion disks around T Tauri stars”, Astrophys. J., 330, 350–373.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1988ApJ...330..350B
Bieging, J.H., Cohen, M., 1985, “Multifrequency radio images of L1551 IRS 5”, Astrophys. J. Lett., 289, L5–L8.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1985ApJ...289L...5B
Bieging, J.H., Cohen, M., 1989, “On the radio variability of V410 Tauri”, Astron. J., 98, 1686–1692.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1989AJ.....98.1686B
Bieging, J.H., Cohen, M., Schwartz, P.R., 1984, “VLA observations of T Tauri stars. II - A luminosity-limited survey of Taurus-Auriga”, Astrophys. J., 282, 699–708.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1984ApJ...282..699B
Boothroyd, A.I., Sackmann, I.-J., Fowler, W.A., 1991, “Our Sun. II. Early mass loss of 0.1M and the case of the missing lithium”, Astrophys. J., 377, 318–329.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1991ApJ...377..318B
Bouvier, J., 1990, “Rotation in T Tauri stars. II - Clues for magnetic activity”, Astron. J., 99, 946–964.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1990AJ.....99..946B
Bouvier, J., Cabrit, S., Fernández, M., Martín, E.L., Matthews, J.M., 1993, “COYOTES I: the photometric variability and rotational evolution of T Tauri stars”, Astron. Astrophys., 272, 176–206.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1993A%26A...272..176B
Bowring, S.A., Williams, I.S., Compston, W., 1989, “3.96 Ga gneisses from the Slave province, Northwest Territories, Canada”, Geology, 17, 971–975
Briggs, K.R., Güdel, M., Telleschi, A., Preibisch, T., Stelzer, B., Bouvier, J., Rebull, L., Audard, M., Scelsi, L., Micela, G., Grosso, N., Palla, F., 2007, “The X-ray activity-rotation relation of T Tauri stars in Taurus-Auriga”, Astron. Astrophys., 468, 413–424.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2007A%26A...468..413B
Brinkman, A.C., Behar, E., Güdel, M., Audard, M., den Boggende, A.J.F., Branduardi-Raymont, G., Cottam, J., Erd, C., den Herder, J.W., Jansen, F., Kaastra, J.S., Kahn, S.M., Mewe, R., Paerels, F.B.S., Peterson, J.R., Rasmussen, A.P., Sakelliou, I., de Vries, C., 2001, “First light measurements with the XMM-Newton reflection grating spectrometers: Evidence for an inverse first ionisation potential effect and anomalous Ne abundance in the Coronae of HR 1099”, Astron. Astrophys., 365, L324–L328.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2001A%26A...365L.324B
Brown, A., 1987, “Radio emission from pre-main-sequence stars in Corona Australis”, Astrophys. J. Lett., 322, L31–L34.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1987ApJ...322L..31B
Brown, A., Jordan, C., Millar, T.J., Gondhalekar, P., Wilson, R., 1981, “H2 emission in the EUV spectrum of T Tauri and Burnham’s nebula”, Nature, 290, 34–36.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1981Natur.290...34B
Butler, C.J., Rodono, M., Foing, B.H., Haisch, B.M., 1986, “Coordinated EXOSAT and spectroscopic observations of flare stars and coronal heating”, Nature, 321, 679–682.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1986Natur.321..679B
Caffee, M.W., Hohenberg, C.M., Swindle, T.D., Goswami, J.N., 1987, “Evidence in meteorites for an active early Sun”, Astrophys. J. Lett., 313, L31–L35.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1987ApJ...313L..31C
Calvet, N., Gullbring, E., 1998, “The Structure and Emission of the Accretion Shock in T Tauri Stars”, Astrophys. J., 509, 802–818.
ADS: External Linkhttp://adsabs.harvard.edu/abs/1998ApJ...509..802C
Calvet, N., Muzerolle, J., Briceño, C., Hernández, J., Hartmann, L., Saucedo, J.L., Gordon, K.D., 2004, “The Mass Accretion Rates of Intermediate-Mass T Tauri Stars”, Astron. J., 128, 1294–1318.
ADS: External Linkhttp://adsabs.harvard.edu/abs/2004AJ....128.1294C
Camenzind, M., 1990, “Magnetized