273 citations · 2.3k across the 62 of their papers we have counts for
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The HO Spectrum of the Massive Protostar AFGL 2136 IRS 1 from 2 to 13 m at High Resolution: Probing the Circumstellar Disk
Nick Indriolo, D. A. Neufeld, A. G. Barr +6
We have observed the massive protostar AFGL 2136 IRS 1 in multiple wavelength windows in the near-to-mid-infrared at high ( km s) spectral resolution using VLT+CRIRES…
Variability in the Assembly of Protostellar Systems
Joel D. Green, Yao-Lun Yang, Tom Megeath +17
Understanding the collapse of clouds and the formation of protoplanetary disks is essential to understanding the formation of stars and planets. Infall and accretion, the mass-aggr…
High-Resolution SOFIA/EXES Spectroscopy of Gas in the Massive Young Stellar Object MonR2 IRS3: Implications for the Sulfur Budget
Ryan Dungee, Adwin Boogert, Curtis N. DeWitt +10
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 s…
Role of environment and gas temperature in the formation of multiple protostellar systems: molecular tracers
Nadia M. Murillo, Ewine F. van Dishoeck, John J. Tobin +2
Context: Simulations suggest that gas heating due to radiative feedback is a key factor in whether or not multiple protostellar systems will form. Chemistry is a good tracer of the…
The VLA Nascent Disk And Multiplicity Survey of Perseus Protostars (VANDAM). IV. Free-Free Emission from Protostars: Links to Infrared Properties, Outflow Tracers, and Protostellar Disk Masses
Łukasz Tychoniec, John J. Tobin, Agata Karska +11
Emission from protostars at centimeter radio wavelengths has been shown to trace the free-free emission arising from ionizing shocks as a result of jets and outflows driven by prot…
The Herschel-PACS legacy of low-mass protostars: Properties of warm and hot gas and its origin in far-UV illuminated shocks
Agata Karska, Michael J. Kaufman, Lars E. Kristensen +11
Recent observations from Herschel allow the identification of important mechanisms responsible for the heating of gas surrounding low-mass protostars and its subsequent cooling in…
The VLA Nascent Disk And Multiplicity Survey of Perseus Protostars (VANDAM). III. Extended Radio Emission from Protostars in Perseus
Łukasz Tychoniec, John J. Tobin, Agata Karska +8
Centimeter continuum emission from protostars offers insight into the innermost part of the outflows, as shock-ionized gas produces free-free emission. We observed a complete popul…
Herschel observations of the circumstellar environment of the two Herbig Be stars R Mon and PDS27
M. J. Jiménez-Donaire, G. Meeus, A. Karska +4
We report and analyse FIR observations of two Herbig Be stars, R Mon and PDS 27, obtained with Herschel's instruments PACS and SPIRE. We construct SEDs and derive the infrared exce…
Oxygen budget in low-mass protostars: the NGC1333-IRAS4A R1 shock observed in [OI] at 63 um with SOFIA-GREAT
L. E. Kristensen, A. Gusdorf, J. C. Mottram +5
In molecular outflows from forming low-mass protostars, most oxygen is expected to be locked up in water. However, Herschel observations have shown that typically an order of magni…
Outflows, infall and evolution of a sample of embedded low-mass protostars. The William Herschel Line Legacy (WILL) survey
J. C. Mottram, E. F. van Dishoeck, L. E. Kristensen +22
[Abridged] We present spectroscopic observations in HO, CO and related species with \textit{Herschel} HIFI and PACS, as well as ground-based follow-up with the JCMT and APEX…
AGB and post-AGB objects in the outer Galaxy
Ryszard Szczerba, Bosco H. K. Yung, Marta Sewiło +2
We present the results of our search for low- and intermediate mass evolved stars in the outer Galaxy using AllWISE catalogue photometry. We show that the [3.4]-[12] versus [4.6]-[…
Stellar evolution in the outer Galaxy
Ryszard Szczerba, Natasza Siódmiak, Aleksandra Leśniewska +2
We investigate the distribution of different classes of spectroscopically identified sources and theoretical models in the color-color diagrams (CCDs) combining the near-infrared (…
Observations and modelling of CO and [CI] in disks. First detections of [CI] and constraints on the carbon abundance
M. Kama, S. Bruderer, M. Carney +23
The gas-solid budget of carbon in protoplanetary disks is related to the composition of the cores and atmospheres of the planets forming in them. The key gas-phase carbon carriers…
Outflow forces in intermediate mass star formation
T. A. van Kempen, M. R. Hogerheijde, E. F. van Dishoeck +22
Intermediate mass protostarsprovide a bridge between theories of low- and high-mass star formation. Emerging molecular outflows can be used to determine the influence of fragmentat…
Far infrared CO and HO emission in intermediate-mass protostars
M. Matuszak, A. Karska, L. E. Kristensen +4
Intermediate-mass young stellar objects (YSOs) provide a link to understand how feedback from shocks and UV radiation scales from low to high-mass star forming regions. Aims: Our a…
APEX-CHAMP+ high-J CO observations of low-mass young stellar objects: IV. Mechanical and radiative feedback
Umut A. Yıldız, Lars E. Kristensen, Ewine F. van Dishoeck +14
During the embedded stage of star formation, bipolar molecular outflows and UV radiation from the protostar are important feedback processes. Our aim is to quantify the feedback, m…
Shockingly low water abundances in Herschel / PACS observations of low-mass protostars in Perseus
A. Karska, L. E. Kristensen, E. F. van Dishoeck +16
Protostars interact with their surroundings through jets and winds impacting on the envelope and creating shocks, but the nature of these shocks is still poorly understood. Our aim…
Water in star-forming regions with Herschel (WISH) V. The physical conditions in low-mass protostellar outflows revealed by multi-transition water observations
J. C. Mottram, L. E. Kristensen, E. F. van Dishoeck +17
Context: Outflows are an important part of the star formation process as both the result of ongoing active accretion and one of the main sources of mechanical feedback on small sca…
Warm gas towards young stellar objects in Corona Australis - Herschel/PACS observations from the DIGIT key programme
Johan E. Lindberg, Jes K. Jørgensen, Joel D. Green +5
The effects of external irradiation on the chemistry and physics in the protostellar envelope around low-mass young stellar objects are poorly understood. The Corona Australis star…
Far-infrared molecular lines from Low- to High-Mass Star Forming Regions observed with Herschel
A. Karska, F. Herpin, S. Bruderer +13
(Abridged) We study the response of the gas to energetic processes associated with high-mass star formation and compare it with studies on low- and intermediate-mass young stellar…
High-J CO survey of low-mass protostars observed with Herschel-HIFI
Umut A. Yıldız, Lars E. Kristensen, Ewine F. van Dishoeck +8
The evolution of deeply embedded young stellar objects (YSOs) has traditionally been traced through dust continuum spectral energy distributions (SEDs), but the use of CO excitatio…
Water in star forming regions with Herschel (WISH) III. Far-infrared cooling lines in low-mass young stellar objects
A. Karska, G. J. Herczeg, E. F. van Dishoeck +22
(Abridged) Far-infrared Herschel-PACS spectra of 18 low-mass protostars of various luminosities and evolutionary stages are studied. We quantify their far-infrared line emission an…
OH far-infrared emission from low- and intermediate-mass protostars surveyed with Herschel-PACS
S. F. Wampfler, S. Bruderer, A. Karska +10
OH is a key species in the water chemistry of star-forming regions, because its presence is tightly related to the formation and destruction of water. This paper presents OH observ…
Water in star-forming regions with Herschel (WISH): II. Evolution of 557 GHz 110-101 emission in low-mass protostars
L. E. Kristensen, E. F. van Dishoeck, E. A. Bergin +22
(Abridged) Water is a key tracer of dynamics and chemistry in low-mass protostars, but spectrally resolved observations have so far been limited in sensitivity and angular resoluti…