R. Loomis

Publications100
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Citations1,567
Highly Influential Citations117
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A Multi-ringed, Modestly Inclined Protoplanetary Disk around AA Tau
AA Tau is the archetype for a class of stars with a peculiar periodic photometric variability thought to be related to a warped inner disk structure with a nearly edge-on viewing geometry. We present… Expand
THE COUPLED PHYSICAL STRUCTURE OF GAS AND DUST IN THE IM Lup PROTOPLANETARY DISK
The spatial distribution of gas and solids in protoplanetary disks determines the composition and formation efficiency of planetary systems. A number of disks show starkly different distributions for… Expand
First detection of gas-phase methanol in a protoplanetary disk
The first detection of gas-phase methanol in a protoplanetary disk (TW Hya) is presented. In addition to being one of the largest molecules detected in disks to date, methanol is also the first disk… Expand
The comet-like composition of a protoplanetary disk as revealed by complex cyanides
TLDR
It is found that the abundance ratios of these nitrogen-bearing organics in the gas phase are similar to those in comets, which implies that complex organics accompany simpler volatiles in protoplanetary disks, and that the rich organic chemistry of the authors' solar nebula was not unique. Expand
Nitrogen Fractionation in Protoplanetary Disks from the H13CN/HC15N Ratio
Nitrogen fractionation is commonly used to assess the thermal history of Solar System volatiles. With ALMA it is for the first time possible to directly measure 14N/15N ratios in common molecules… Expand
Discovery of the interstellar chiral molecule propylene oxide (CH3CHCH2O)
TLDR
Propylene oxide is detected in the gas phase in a cold, extended molecular shell around the embedded, massive protostellar clusters in the Sagittarius B2 star-forming region, representative of the earliest stage of solar system evolution in which a chiral molecule has been found. Expand
An ALMA survey of DCN/H13CN and DCO+/H13CO+ in protoplanetary disks
The deuterium enrichment of molecules is sensitive to their formation environment. Constraining patterns of deuterium chemistry in protoplanetary disks is therefore useful for probing how material is… Expand
N 2 and CO Desorption Energies from Water Ice
The relative desorption energies of CO and N$_2$ are key to interpretations of observed interstellar CO and N$_2$ abundance patterns, including the well-documented CO and N$_2$H$^+$ anti-correlations… Expand
Increased H2CO production in the outer disk around HD 163296
Three formaldehyde lines were observed (H$_2$CO 3$_{03}$--2$_{02}$, H$_2$CO 3$_{22}$--2$_{21}$, and H$_2$CO 3$_{21}$--2$_{20}$) in the protoplanetary disk around the Herbig Ae star HD 163296 with… Expand
Multiple Stellar Flybys Sculpting the Circumstellar Architecture in RW Aurigae
We present high-resolution ALMA Band 6 and 7 observations of the tidally disrupted protoplanetary disks of the RW Aurigae binary. Our observations reveal the presence of additional tidal streams to… Expand
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