Cold Disks: Spitzer Spectroscopy of Disks around Young Stars with Large Gaps (2007)
Brown, J. M., Blake, G. A., Dullemond, C. P., Merin, B., Augereau, J. C., Boogert, A. C. A., ...
We have identified four circumstellar disks with a deficit of dust emission from their inner 15-50 AU. All four stars have F-G spectral type, and were uncovered as part of the Spitzer Space Telescope...
Probing protoplanetary disks with silicate emission: Where is the silicate emission zone? (2007)
Kessler-Silacci, J. E., Dullemond, C. P., Augereau, J. C., Merín, B., Geers, V. C., Van Dishoeck, E. F., ...
Recent results indicate that the grain size and crystallinity inferred from observations of silicate features may be correlated with the spectral type of the central star and/or disk geometry. In...
Cold disks: Spitzer Spectroscopy of disks around young stars with large gaps (2007)
Brown, J. M., Blake, G. A., Dullemond, C. P., Merín, B., Augereau, J. C., Boogert, A. C. A., ...
We have identified four circumstellar disks with a deficit of dust emission from their inner 15-50 AU. All four stars have F-G spectral type and were uncovered as part of the Spitzer Space Telescope...
Probing Protoplanetary Disks with Silicate Emission: Where is the silicate emission zone? (2006)
Kessler-Silacci, J. E., Dullemond, C. P., Merin, B., Geers, V. C., Van Dishoeck, E. F., ...
Recent results indicate that the grain size and crystallinity inferred from observations of silicate features may be correlated with spectral type of the central star and/or disk geometry. In this...
Spitzer-IRS spectra of disks around T Tauri stars II. PAH emission features (2006)
Geers, V. C., Pontoppidan, K. M., Dullemond, C. P., Visser, R., Kessler-Silacci, J. E., ...
Aims: We search for PAH features towards T Tauri stars and compare them with surveys of Herbig Ae/Be stars. The presence and strength of the PAH features are interpreted with disk radiative transfer...
Analysis of the dust evolution in the circumstellar disks of TTauri stars (2006)
Schegerer, A., Wolf, S., Voshchinnikov, N. V., Przygodda, F., Kessler-Silacci, J. E.
We present a compositional analysis of 8-13um spectra of 32 young stellar objects (YSOs). Our sample consists of 5 intermediate-mass stars and 27 low-mass stars. While the spectra and first...
Young, Low-Mass Brown Dwarfs with Mid-Infrared Excesses (2006)
Allers, K. N., Kessler-Silacci, J. E., Cieza, L. A., Jaffe, D. T.
We have combined new I, J, H, and Ks imaging of portions of the Chamaeleon II, Lupus I, and Ophiuchus star-forming clouds with 3.6 to 24 micron imaging from the Spitzer Legacy Program, "From...
Analysis of the dust evolution in the circumstellar disks of T Tauri stars (2006)
Schegerer, A., Wolf, S., Voshchinnikov, N. V., Przygodda, F., Kessler-Silacci, J. E.
Aims.We present a compositional analysis of 8{-}13 mu m spectra of 32 young stellar objects (YSOs). Our sample consists of 5 intermediate-mass stars and 27 low-mass stars. Although some previous...
Hot organic molecules toward a young low-mass star: A look at inner disk chemistry (2006)
Lahuis, F., Van Dishoeck, E. F., Boogert, A. C. A., Pontoppidan, K. M., Blake, G. A., Dullemond, C. P., ...
Spitzer Space Telescope spectra of the low-mass young stellar object (YSO) IRS 46 (Lbol~0.6 Lsolar) in Ophiuchus reveal strong vibration-rotation absorption bands of gaseous C2H2, HCN, and CO2. This...
C2D Spitzer-IRS spectra of disks around T Tauri stars. II. PAH emission features (2006)
Geers, V. C., Augereau, J. C., Pontoppidan, K. M., Dullemond, C. P., Visser, R., Kessler-Silacci, J. E., ...
Aims.We search for Polycyclic Aromatic Hydrocarbon (PAH) features towards young low-mass (T Tauri) stars and compare them with surveys of intermediate mass (Herbig Ae/Be) stars. The presence and...
Hot Organic Molecules Toward a Young Low-Mass Star: A Look at Inner Disk Chemistry (2005)
Lahuis, F., Van Dishoeck, E. F., Boogert, A. C. A., Pontoppidan, K. M., Blake, G. A., Dullemond, C. P., ...
Spitzer Space Telescope spectra of the low mass young stellar object (YSO) IRS 46 (L_bol ~ 0.6 L_sun) in Ophiuchus reveal strong vibration-rotation absorption bands of gaseous C2H2, HCN, and CO2....
Spitzer Mid-infrared Spectroscopy of Ices Toward Extincted Background Stars (2005)
Knez, C., Boogert, A. C. A., Pontoppidan, K. M., Kessler-Silacci, J. E., Van Dishoeck, E. F., Evans II, N. J., ...
A powerful way to observe directly the solid state inventory of dense molecular clouds is by infrared spectroscopy of background stars. We present Spitzer/IRS 5-20 micron spectra of ices toward stars...
C2D Spitzer-IRS spectra of disks around T Tauri stars: I. Silicate emission and grain growth (2005)
Kessler-Silacci, J. E., Dullemond, C. P., Geers, V., Lahuis, F., Evans II, N. J., ...
Infrared ~5--35 um spectra for 40 solar-mass T Tauri stars and 7 intermediate-mass Herbig Ae stars with circumstellar disks were obtained using the Spitzer Space Telescope as part of the c2d IRS...
Jorgensen, J. K., Lahuis, F., Schoeier, F. L., Van Dishoeck, E. F., Blake, G. A., Boogert, A. C. A., ...
Mid-infrared (23-35 micron) emission from the deeply embedded "Class 0" protostar IRAS16293-2422 is detected with the Spitzer Space Telescope infrared spectrograph. A detailed radiative transfer...
8--13 um spectroscopy of YSOs: Evolution of the silicate feature (2004)
Kessler-Silacci, J. E., Hillenbrand, L. A., Blake, G. A., Meyer, M. R.
In order to investigate possible connections between dust processing and disk properties, 8--13 um spectra of 34 young stars, with a range of circumstellar environments and spectral types A to M,...