111 citations · 955 across the 27 of their papers we have counts for
27 papers
A radical transition in the post-main-sequence system U Equulei
Tomek Kaminski, Mirek R. Schmidt, Anlaug Amanda Djupvik +6
U Equ is an unusual maser-hosting IR source discovered in the 1990s. It was tentatively classified as a post-AGB star with a unique optical spectrum displaying rare emission and ab…
AlH lines in the blue spectrum of Proxima Centauri
Yakiv V. Pavlenko, Jonathan Tennyson, Sergei N. Yurchenko +4
The recently-computed ExoMol line lists for isotopologues of AlH are used to analyse the blue spectrum (4000-4500 Å) of Proxima Cen (M5.5 V). Comparison of the observed and compute…
V838 Monocerotis as seen by ALMA: a remnant of a binary merger in a triple system
Tomek Kamiński, Romuald Tylenda, Aleksandra Kiljan +6
V838 Mon erupted in 2002 quickly becoming the prototype of a new type of stellar eruptions known today as (luminous) red novae. The red nova outbursts are thought to be caused by s…
Molecular remnant of Nova 1670 (CK Vulpeculae): I. Properties and enigmatic origin of the gas
T. Kaminski, K. M. Menten, R. Tylenda +5
CK Vul erupted in 1670 and is considered a stellar-merger candidate. Its remnant contains a molecular component of surprisingly rich composition. We present interferometric line su…
Post-outburst spectra of a stellar-merger remnant of V1309 Scorpii: from a twin of V838 Monocerotis to a clone of V4332 Sagittarii
Tomasz Kaminski, Elena Mason, Romulad Tylenda +1
We present optical and infrared spectroscopy of V1309 Sco, an object that erupted in 2008 in a stellar-merger event. During the outburst, V1309 Sco displayed characteristics typica…
The wind of W Hya as seen by Herschel. II. The molecular envelope of W Hya
T. Khouri, A. de Koter, L. Decin +18
The evolution of low- and intermediate-mass stars on the asymptotic giant branch (AGB) is mainly controlled by the rate at which these stars lose mass in a stellar wind. Understand…
The wind of W Hya as seen by Herschel - I. The CO envelope
T. Khouri, A. de Koter, L. Decin +25
Asymptotic giant branch (AGB) stars lose their envelopes by means of a stellar wind whose driving mechanism is not understood well. Characterizing the composition and thermal and d…
Chemical abundance analysis of symbiotic giants. RW Hya, SY Mus, BX Mon, and AE Ara
Cezary Galan, Joanna Mikolajewska, Kenneth H. Hinkle +2
Symbiotic stars are the long period, binary systems of strongly interacting stars at the final stages of evolution which can be useful tool to understand the chemical evolution of…
HIFISTARS Herschel/HIFI observations of VY Canis Majoris. Molecular-line inventory of the envelope around the largest known star
J. Alcolea, V. Bujarrabal, P. Planesas +16
To gain insight into the physical conditions and kinematics of the warm (100-1000 K) gas around the red hyper-giant VY CMa, we performed sensitive high spectral resolution observat…
Herschel/HIFI search for H2-17O and H2-18O in IRC+10216: constraints on models for the origin of water vapor
David A. Neufeld, Volker Tolls, Marcelino Agúndez +7
We report the results of a sensitive search for the minor isotopologues of water, H2-17O and H2-18O, toward the carbon-rich AGB star IRC+10216 (a.k.a. CW Leonis) using the HIFI ins…
Herschel/HIFI observations of red supergiants and yellow hypergiants: I. Molecular inventory
D. Teyssier, G. Quintana-Lacaci, A. P. Marston +17
Red supergiant stars (RSGs) and yellow hypergiant stars (YHGs) are believed to be the high-mass counterparts of stars in the AGB and early post-AGB phases. We study the mass-loss i…
On the physical structure of IRC+10216. Ground-based and Herschel observations of CO and CCH
E. De Beck, R. Lombaert, M. Agúndez +17
The C-rich AGB star IRC+10216 undergoes strong mass loss, and quasi-periodic density enhancements in the circumstellar matter have been reported. CO is ubiquitous in the CSE, while…
Herschel/HIFI observations of O-rich AGB stars : molecular inventory
K. Justtanont, T. Khouri, M. Maercker +15
Spectra, taken with the heterodyne instrument, HIFI, aboard the Herschel Space Observatory, of O-rich asymptotic giant branch (AGB) stars which form part of the guaranteed time key…
Herschel/HIFI observations of molecular emission in protoplanetary nebulae and young planetary nebulae
V. Bujarrabal, J. Alcolea, R. Soria-Ruiz +1
We performed Herschel/HIFI observations of intermediate-excitation molecular lines in the far-infrared/submillimeter range in a sample of ten protoplanetary nebulae and young plane…
The widespread occurence of water vapor in the circumstellar envelopes of carbon-rich AGB stars: first results from a survey with Herschel/HIFI
D. A. Neufeld, E. González-Alfonso, G. Melnick +16
We report the preliminary results of a survey for water vapor in a sample of eight C stars with large mid-IR continuum fluxes: V384 Per, CIT 6, V Hya, Y CVn, IRAS 15194-5115, V Cyg…
Herschel/HIFI observations of IRC+10216: water vapor in the inner envelope of a carbon-rich AGB star
David A. Neufeld, Eduardo González-Alfonso, Gary J. Melnick +6
We report the results of observations of ten rotational transitions of water vapor toward the carbon-rich AGB (asymptotic giant branch) star IRC+10216 (CW Leonis), carried out with…
Centrosymmetric molecules as possible carriers of diffuse interstellar bands
M. Kazmierczak, M. R. Schmidt, G. A. Galazutdinov +3
In this paper, we present new data with interstellar C2 (Phillips bands A-X), from observations made with the Ultraviolet-Visual Echelle Spectrograph of the European Southern Obser…
Herschel/HIFI deepens the circumstellar NH3 enigma
K. M. Menten, F. Wyrowski, J. Alcolea +23
Circumstellar envelopes (CSEs) of a variety of evolved stars have been found to contain ammonia (NH3) in amounts that exceed predictions from conventional chemical models by many o…
Detection of hydrogen fluoride absorption in diffuse molecular clouds with Herschel/HIFI: a ubiquitous tracer of molecular gas
P. Sonnentrucker, D. A. Neufeld, T. G. Phillips +47
We discuss the detection of absorption by interstellar hydrogen fluoride (HF) along the sight line to the submillimeter continuum sources W49N and W51. We have used Herschel's HIFI…
Herschel/HIFI observations of high-J CO transitions in the protoplanetary nebula CRL618
V. Bujarrabal, J. Alcolea, R. Soria-Ruiz +25
We performed Herschel/HIFI observations of several CO lines in the far-infrared/sub-mm in the protoplanetary nebula CRL618. The high spectral resolution provided by HIFI allows mea…
A HIFI preview of warm molecular gas around chi Cyg : first detection of H2O emission toward an S-type AGB star
K. Justtanont, L. Decin, F. L. Schoier +24
A set of new, sensitive, and spectrally resolved, sub-millimeter line observations are used to probe the warm circumstellar gas around the S-type AGB star chi Cyg. The observed lin…
Herschel/HIFI measurements of the ortho/para ratio in water towards Sagittarius B2(M) and W31C
D. C. Lis, T. G. Phillips, P. F. Goldsmith +74
We present Herschel/HIFI observations of the fundamental rotational transitions of ortho- and para-HO and HO in absorption towards Sagittarius~B2(M) and W31C. The…
Discovery of water vapour in the carbon star V Cygni from observations with Herschel/HIFI
D. A. Neufeld, E. González-Alfonso, G. Melnick +25
We report the discovery of water vapour toward the carbon star V Cygni. We have used Herschel's HIFI instrument, in dual beam switch mode, to observe the 1(11) - 0(00) para-water t…
Water content and wind acceleration in the envelope around the oxygen-rich AGB star IK Tau as seen by Herschel/HIFI
L. Decin, K. Justtanont, E. De Beck +4
During their asymptotic giant branch, evolution low-mass stars lose a significant fraction of their mass through an intense wind, enriching the interstellar medium with products of…