Search Results - "Najita, J. R"

STELLAR PARAMETERS AND ACCRETION RATE OF THE TRANSITION DISK STAR HD 142527 FROM X-SHOOTER by MENDIGUTIA, I, Fairlamb, J, Montesinos, B, Oudmaijer, R D, Najita, J R, Brittain, S D, VAN DEN ANCKER, M E

“…HD 142527 is a young pre-main-sequence star with properties indicative of the presence of a giant planet and/or a low-mass stellar companion. We have analyzed…”
Get full text

Atomic Diagnostics of X-Ray-Irradiated Protoplanetary Disks by Meijerink, R, Glassgold, A. E, Najita, J. R

“…We study atomic-line diagnostics of the inner regions of protoplanetary disks with our model of X-ray-irradiated disk atmospheres, which was previously used to…”
Get full text

The mass budget of planet-forming discs: isolating the epoch of planetesimal formation by Najita, J. R., Kenyon, S. J.

“…The high rate of planet detection among solar-type stars argues that planet formation is common. It is also generally assumed that planets form in…”
Get full text

A Spitzer Survey of Mid-infrared Molecular Emission from Protoplanetary Disks. II. Correlations and Local Thermal Equilibrium Models by Salyk, C, Pontoppidan, K. M, Blake, G. A, Najita, J. R, Carr, J. S

“…We present an analysis of Spitzer Infrared Spectrograph observations of H2O, OH, HCN, C2H2, and CO2 emission, and Keck-NIRSPEC observations of CO emission,…”
Get full text

Formation of Water in the Warm Atmospheres of Protoplanetary Disks by Glassgold, A. E, Meijerink, R, Najita, J. R

Get full text

The Near Stellar Environment of Class 0 Protostars: A First Look with Near-Infrared Spectroscopy by Laos, E, Greene, T. P, Najita, J. R, Stassun, K. G

“…We present near-infrared K-band spectra for a sample of 7 Class 0 protostars in the Perseus and Orion star-forming regions. We detect Br gamma, CO overtone,…”
Get full text

PHOTOCHEMICAL HEATING OF DENSE MOLECULAR GAS by Glassgold, A. E., Najita, J. R.

“…ABSTRACT Photochemical heating is analyzed with an emphasis on the heating generated by chemical reactions initiated by the products of photodissociation and…”
Get full text

PROBING STELLAR ACCRETION WITH MID-INFRARED HYDROGEN LINES by Rigliaco, Elisabetta, Pascucci, I., Duchene, G., Edwards, S., Ardila, D. R., Grady, C., Mendigutía, I., Montesinos, B., Mulders, G. D., Najita, J. R., Carpenter, J., Furlan, E., Gorti, U., Meijerink, R., Meyer, M. R.

“…In this paper we investigate the origin of the mid-infrared (IR) hydrogen recombination lines for a sample of 114 disks in different evolutionary stages (full,…”
Get full text

Demographics of transition objects by Najita, Joan R., Strom, Stephen E., Muzerolle, James

“…The unusual properties of transition objects (young stars with an optically thin inner disc surrounded by an optically thick outer disc) suggest that…”
Get full text

Photochemical Heating of Dense Molecular Gas by Glassgold, A. E, Najita, J. R

“…Photochemical heating is analyzed with emphasis on the heating generated by chemical reactions initiated by the products of photodissociation and…”
Get full text

The Mass Budget of Planet Forming Discs: Isolating the Epoch of Planetesimal Formation by Najita, J. R, Kenyon, S. J

“…The high rate of planet detection among solar-type stars argues that planet formation is common. It is also generally assumed that planets form in…”
Get full text

Warm Gas in the Inner Disks around Young Intermediate-Mass Stars by Brittain, Sean D, Simon, Theodore, Najita, Joan R, Rettig, Terrence W

“…The characterization of gas in the inner disks around young stars is of particular interest because of its connection to planet formation. In order to study…”
Get full text

Neon Fine-Structure Line Emission by X-Ray Irradiated Protoplanetary Disks by Glassgold, Alfred E, Najita, Joan R, Igea, Javier

“…Using a thermal-chemical model for the generic T Tauri disk of D'Alessio and colleagues, we estimate the strength of the fine-structure emission lines of Ne II…”
Get full text

Stellar parameters and accretion rate of the transition disk star HD 142527 from X-Shooter by Mendigutía, I, Fairlamb, J, Montesinos, B, Oudmaijer, R. D, Najita, J. R, Brittain, S. D, Ancker, M. E. van den

“…HD 142527 is a young pre-main sequence star with properties indicative of the presence of a giant planet or/and a low-mass stellar companion. We have analyzed…”
Get full text

Probing stellar accretion with mid-infrared hydrogen lines by Rigliaco, Elisabetta, Pascucci, I, Duchene, G, Edwards, S, Ardila, D. R, Grady, C, Mendigutía, I, Montesinos, B, Mulders, G. D, Najita, J. R, Carpenter, J, Furlan, E, Gorti, U, Meijerink, R, Meyer, M. R

“…In this paper we investigate the origin of the mid-infrared (IR) hydrogen recombination lines for a sample of 114 disks in different evolutionary stages (full,…”
Get full text

High-Resolution Spectroscopy of [Ne II] Emission from TW Hydrae by Herczeg, Gregory J, Najita, Joan R, Hillenbrand, Lynne A, Pascucci, Ilaria

“…We present high-resolution echelle spectra of [Ne II] 12.81 mu m emission from the classical T Tauri star (CTTS) TW Hya, obtained with MICHELLE on Gemini…”
Get full text

Formation of Water in the Warm Atmospheres of Protoplanetary Disks by Glassgold, A. E, Meijerink, R, Najita, J. R

“…Astrophys.J.701:142-153,2009 The gas-phase chemistry of water in protoplanetary disks is analyzed with a model based on X-ray heating and ionization of the…”
Get full text

FORMATION OF WATER IN THE WARM ATMOSPHERES OF PROTOPLANETARY DISKS by Glassgold, A. E., Meijerink, R., Najita, J. R.

“…The gas-phase chemistry of water in protoplanetary disks is analyzed with a model based on X-ray heating and ionization of the disk atmosphere. Several…”
Get full text

DIGIT survey of far-infrared lines from protoplanetary disks I by Fedele, D, Bruderer, S, van Dishoeck, E. F, Carr, J, Herczeg, G. J, Salyk, C, EvansII, Neal J, Bouwman, J, Meeus, G, Henning, Th, Green, J, Najita, J. R, Guedel, M

“…[abridged] We present far-infrared spectroscopic observations of PMS stars taken with Herschel/PACS as part of the DIGIT key project. The sample includes 22…”
Get full text

A Spitzer Survey of Mid-Infrared Molecular Emission from Protoplanetary Disks II: Correlations and LTE Models by Salyk, C, Pontoppidan, K. M, Blake, G. A, Najita, J. R, Carr, J. S

“…ApJ, 2011, 731, 130; http://stacks.iop.org/0004-637X/731/130 We present an analysis of Spitzer-IRS observations of H2O, OH, HCN, C2H2, and CO2 emission, and…”
Get full text