Zobrazeno 1 - 10
of 186
pro vyhledávání: '"Richter, Matthew"'
We have measured the gas temperature in the IC 63 photodissociation region (PDR) using the S(1) and S(5) pure rotation lines of molecular hydrogen with SOFIA/EXES. We divide the PDR into three regions for analysis based on the illumination from $\gam
Externí odkaz:
http://arxiv.org/abs/2110.11703
Autor:
Najita, Joan R., Carr, John S., Brittain, Sean D., Lacy, John H., Richter, Matthew J., Doppmann, Greg W.
Physical processes that redistribute or remove angular momentum from protoplanetary disks can drive mass accretion onto the star and affect the outcome of planet formation. Despite ubiquitous evidence that protoplanetary disks are engaged in accretio
Externí odkaz:
http://arxiv.org/abs/2012.00016
Autor:
Barr, Andrew G., Boogert, Adwin, DeWitt, Curtis N., Montiel, Edward, Richter, Matthew J., Lacy, John H., Neufeld, David A., Indriolo, Nick, Pendleton, Yvonne, Chiar, Jean, Tielens, Alexander G. G. M.
We have performed a high resolution 4-13 ${\mu}m$ spectral survey of the hot molecular gas associated with the massive protostars AFGL 2591 and AFGL 2136, utilising the Echelon-Cross-Echelle-Spectrograph (EXES) on-board the Stratospheric Observatory
Externí odkaz:
http://arxiv.org/abs/2007.11266
Autor:
Harper, Graham M., DeWitt, Curtis N., Richter, Matthew J., Guinan, Edward F., Wasatonic, Richard, Ryde, Nils, Edward, Montiel, J., Townsend, Amanda J.
In 2019 October Betelgeuse began a decline in V-band brightness that went beyond the minimum expected from its quasi-periodic ~420 day cycle, becoming the faintest in recorded photometric history. Observations obtained in 2019 December with VLT/SPHER
Externí odkaz:
http://arxiv.org/abs/2003.13884
Supernovae from core-collapse of massive stars drive shocks into the molecular clouds from which the stars formed. Such shocks affect future star formation from the molecular clouds, and the fast-moving, dense gas with compressed magnetic fields is a
Externí odkaz:
http://arxiv.org/abs/1909.02079
Autor:
Lombardo, Nicholas A, Nixon, Conor A, Greathouse, Thomas K, Bézard, Bruno, Jolly, Antoine, Vinatier, Sandrine, Teanby, Nicholas A, Richter, Matthew J, Irwin, Patrick J G, Coustenis, Athena, Flasar, F Michael
Publikováno v:
The Astrophysical Journal Letters, 881:L33 (6pp), 2019 August 20
The atmosphere of Titan, the largest moon of Saturn, is rich in organic molecules, and it has been suggested that the moon may serve as an analog for the pre-biotic Earth due to its highly reducing chemistry and existence of global hazes. Photochemic
Externí odkaz:
http://arxiv.org/abs/1908.07424
Autor:
Neufeld, David A., DeWitt, Curtis, Lesaffre, Pierre, Cabrit, Sylvie, Gusdorf, Antoine, Tram, Le Ngoc, Richter, Matthew
Spectrally-resolved observations of three pure rotational lines of H$_2$, conducted with the EXES instrument on SOFIA toward the classic bow shock HH7, reveal systematic velocity shifts between the S(5) line of ortho-H$_2$ and the two para-H$_2$ line
Externí odkaz:
http://arxiv.org/abs/1905.10381
Autor:
Pontoppidan, Klaus M., Salyk, Colette, Banzatti, Andrea, Blake, Geoffrey A., Walsh, Catherine, Lacy, John H., Richter, Matthew J.
The dominant reservoirs of elemental nitrogen in protoplanetary disks have not yet been observationally identified. Likely candidates are HCN, NH$_3$ and N$_2$. The relative abundances of these carriers determine the composition of planetesimals as a
Externí odkaz:
http://arxiv.org/abs/1902.03647
Autor:
Dungee, Ryan, Boogert, Adwin, DeWitt, Curtis N., Montiel, Edward, Richter, Matthew J., Barr, Andrew G., Blake, Geoffrey A., Charnley, Steven B., Indriolo, Nick, Karska, Agata, Neufeld, David A., Smith, Rachel L., Tielens, Alexander G. G. M.
Sulfur has been observed to be severely depleted in dense clouds leading to uncertainty in the molecules that contain it and the chemistry behind their evolution. Here, we aim to shed light on the sulfur chemistry in young stellar objects (YSOs) by u
Externí odkaz:
http://arxiv.org/abs/1811.05986
Autor:
Barr, Andrew G., Boogert, Adwin, DeWitt, Curtis N., Montiel, Edward, Richter, Matthew J., Indriolo, Nick, Neufeld, David A., Pendleton, Yvonne, Chiar, Jean, Dungee, Ryan, Tielens, Alexander G. G. M.
We have performed a 5-8 $\mu$m spectral line survey of the hot molecular core associated with the massive protostar AFGL 2591, using the Echelon-Cross-Echelle Spectrograph (EXES) on the Stratospheric Observatory for Infrared Astronomy (SOFIA). We hav
Externí odkaz:
http://arxiv.org/abs/1810.10833