Near infrared imaging of the cometary globule CG12 (2009)
Haikala, Lauri K., Reipurth, Bo
Cometary globule 12 is a relatively little investigated medium- and low mass star forming region 210 pc above the Galactic plane. NIR J, H, and Ks imaging and stellar photometry is used to analyse...
We present results from an optical imaging and spectroscopic monitoring campaign on the young, low-mass eruptive variable star V1647 Orionis. The star and associated nebulosity (McNeil's Nebula) were...
Handbook of Star Forming Regions Vol. I Astronomical Society of the Pacific, 2008 (2009)
Bo Reipurth, Michael R. Meyer, Kevin Flaherty, Joanna L. Levine, Brendan P. Bowler, Ryo Kandori
Abstract. We review star formation in the southern L1630 molecular cloud (also known as Orion B) as well as the relationship between the young stellar populations and the remnant molecular gas. We...
Young Stars in NGC 6231 and the Sco OB1 Association (2009)
Abstract. NGC 6231 is a young cluster in the southern sky, around 3-5 Myr old, located at a distance of about 1.6 kpc at the near side of the Sagittarius spiral arm. It forms the nucleus of the...
Handbook of Star Forming Regions Vol. II Astronomical Society of the Pacific, c ○ 2008 (2009)
Bo Reipurth, Bo Reipurth, Steven A. Rodney, Steve Heathcote
Abstract. The Lynds 291 cloud in Sagittarius is a giant molecular cloud with approximate dimensions 20 pc × 80 pc located at a distance of approximately 1700 pc. The northern part of the cloud is...
Young Stars and Molecular Clouds in the IC 5146 Region (2009)
Bo Reipurth, G. H. Herbig, Bo Reipurth
Abstract. IC 5146 is both a reflection nebula and an HII region surrounding the B0 V star BD+46 ◦ 3474. The region is relatively nearby at 1.2 kpc. It has attracted considerable attention, and has...
The Circinus Star Forming Complex (2009)
Bo Reipurth, Bo Reipurth, John Bally, Josh Walawender
Abstract. The Circinus giant molecular cloud is a little explored region that deserves closer study owing to the many signs of vigorous low-mass star formation in the form of Hα emission stars,...
Young Stars and Molecular Clouds in the IC 2944/2948 Complex (2009)
Abstract. One of the fine clusters of the southern sky is found within the extended HII region IC 2944/2948. The cluster, which appears to be only a few million years old, contains a dozen O stars,...
Handbook of Star Forming Regions Vol. II Astronomical Society of the Pacific, c ○ 2008 (2009)
Bo Reipurth, Star Formation, Bok Globules, Small Clouds, Bo Reipurth
Abstract. While most star formation occurs in giant molecular clouds, numerous small clouds and Bok globules are known to each harbor one or a few young stars. Studies of such isolated newborn stars...
Star Formation and Young Clusters in Cygnus (2009)
Bo Reipurth, Bo Reipurth, Nicola Schneider
Abstract. The Great Cygnus Rift harbors numerous very active regions of current or recent star formation. In this part of the sky we look down a spiral arm, so regions from only a few hundred pc to...
Handbook of Star Forming Regions Vol. I Astronomical Society of the Pacific, 2008 (2009)
Abstract. S106 is a bipolar nebula illuminated and excited by a central star called S106 IR. Depending on its distance (literature values range from 500 pc to 5.7 kpc) this star is of late O to early...
Bo Reipurth, John Bally, Josh Walawender, Doug Johnstone, Helen Kirk, Alyssa Goodman
Abstract. The Perseus molecular cloud and its surroundings contain several regions of active or recent star formation lying within about 300 pc of the Sun (see Figure 1). Roughly a dozen OB and over...
The Young Cluster NGC 6604 and the Serpens OB2 Association (2009)
Abstract. NGC 6604 is a young cluster in Serpens with an age of 4-5 Myr and at a distance of about 1.7 kpc. It forms the densest part of the wider Ser OB2 association, which contains about 100 OB...
Handbook of Star Forming Regions Vol. II Astronomical Society of the Pacific, c ○ 2008 (2009)
Bo Reipurth, Low Mass, Star Formation, Norma Cloud, Bo Reipurth, Markus Nielbock
Abstract. A small filamentary cloud in Norma hosts a number of young low-mass stars in various stages of evolution, from visible Hα emission stars to embedded sources detected only in the...
The L1617 and L1622 Cometary Clouds in Orion (2009)
Bo Reipurth, Bo Reipurth, S. T. Megeath, John Bally, J. Walawender
Abstract. The molecular cloud complex encompassing the cometary clouds L1617 and L1622 is located just outside of Barnard’s Loop in Orion. It lies to the northeast of the Orion Nebula Cluster at a...
NGC 1333: A Nearby Burst of Star Formation (2009)
Bo Reipurth, J. Walawender, J. Bally, J. Di Francesco, J. Jørgensen, K. Getman
Abstract. NGC 1333 is the currently most active region of star formation in the Perseus molecular cloud. The presence of emission-line stars and Herbig-Haro objects first established NGC 1333 as an...
Star Formation and Molecular Clouds towards the Galactic Anti-Center (2009)
Bo Reipurth, Bo Reipurth, Chi-hung Yan
Abstract. The Galactic Anticenter region hosts a a number of massive molecular cloud complexes, some of which are currently actively forming stars. Two major OB associations, Gem OB1 and Aur OB1, are...
An Adaptive Optics Survey for Close Protostellar Binaries (2009)
Connelley, Michael, Reipurth, Bo, Tokunaga, Alan
In order to test the hypothesis that Class I protostellar binary stars are a product of ejections during the dynamical decay of non-hierarchical multiple systems, we combined the results of new...
V1647 Orionis: Reinvigorated Accretion and the Re-Appearance of McNeil's Nebula (2009)
Aspin, Colin, Reipurth, Bo, Beck, Tracy L., Aldering, Greg, Doering, Ryan L., Hammel, Heidi B., ...
In late 2003, the young eruptive variable star V1647 Orionis optically brightened by over 5 magnitudes, stayed bright for around 26 months, and then decline to its pre-outburst level. In August 2008...
Lee, Chin-Fei, Mao, Yao-Yuan, Reipurth, Bo
We have mapped the central region of the HH 111 protostellar system in 1.33 mm continuum, C18O(J=2-1), 13CO (J=2-1), and SO (N_J=5_6-4_5) emission at ~3" resolution with the Submillimeter Array....
V1647 ORIONIS: Keck/Nirspec 2 MICRON Echelle Observations (2008)
Aspin, Colin, Greene, Tom P., Reipurth, Bo
We present new Keck II NIRSPEC high-spectral resolution 2 um echelle observations of the young eruptive variable star V1647 Orionis. This star went into outburst in late 2003 and faded to its...
Rodney, Steven A., Reipurth, Bo
The W40 complex is a nearby site of recent massive star formation composed of a dense molecular cloud adjacent to an HII region that contains an embedded OB star cluster. The HII region is beginning...
Connelley, Michael, Reipurth, Bo, Tokunaga, Alan
We present the observational results of a near-infrared survey of a large sample of Class I protostars designed to determine the Class I binary separation distribution from ~100 AU to ~5000 AU. We...
Connelley, Michael, Reipurth, Bo, Tokunaga, Alan
We present the Class I protostellar binary separation distribution based on the data tabulated in the companion paper. We verify the excess of Class I binary stars over solar-type main-sequence...
High Resolution Near-Infrared Spectroscopy of FUors and FUor-like stars (2008)
Greene, Tom, Aspin, Colin, Reipurth, Bo
We present new high resolution (R=18,000) near-infrared spectroscopic observations of a sample of classical FU Orionis stars (FUors) and other young stars with FUor characteristics that are sources...
Multiple CO Outflows in Circinus: The Churning of a Molecular Cloud (2007)
John Bally, Bo Reipurth, Charles J. Lada
We present a millimeter wave study of a cluster of bipolar CO outflows embedded in the western end of the Circinus molecular cloud complex, G317-4, that is traced by very high optical extinction. For...
Hubble Space Telescope NICMOS images and VLA maps (2007)
Bo Reipurth, Ka Chun Yu, Steve Heathcote, John Bally
Abstract. We have observed the region around the HH 111 jet source with NICMOS onboard the Hubble Space Telescope, using two filters, F160W and F205W, which besides stellar continuum transmit the...
Bo Reipurth, Steve Heathcote, Ka Chun Yu, John Bally
We present new Hubble Space Telescope (HST) NICMOS images of the source region of the HH 1/2 ow. The HH 1 jet is traced in the [Fe II] 1.64 km and the 2.12 km lines to about of the deeply H 2
[Fe II] JETS, BINARITY, AND ENVELOPE CAVITIES (2007)
Bo Reipurth, Ka Chun Yu, Steve Heathcote, John Bally
We have observed seven regions surrounding the driving sources of Herbig-Haro ows using the NICMOS infrared camera on board the Hubble Space Telescope. These Herbig-Haro energy sources,
V1647 Orionis: One Year into Quiescence (2007)
Aspin, Colin, Beck, Tracy L., Reipurth, Bo
We present new optical, near-IR, and mid-IR observations of the young eruptive variable star V1647 Orionis that went into outburst in late 2004 for approximately two years. Our observations were...
Visual Binaries in the Orion Nebula Cluster (2007)
Reipurth, Bo, Guimarães, Marcelo M., Connelley, Michael S., Bally, John
We have carried out a major survey for visual binaries towards the Orion Nebula Cluster using HST images obtained with an H-alpha filter. Among 781 likely ONC members more than 60" from theta-1 Ori...
The Structure of the Inner HH 34 Jet from Optical Integral Field Spectroscopy (2006)
Beck, Tracy L., Riera, A., Raga, A. C., Reipurth, Bo
We present high spatial resolution optical integral field spectroscopy of a collimated Herbig-Haro jet viewed nearly edge-on. Maps of the line emission, velocity centroid, and velocity dispersion...
Infrared Nebulae Around Young Stellar Objects (2006)
Connelley, Michael S., Reipurth, Bo, Tokunaga, Alan T.
We present a K-band atlas of 106 reflection nebulae, 41 of which are new discoveries. We observed these nebulae with the UH 2.2 m telescope in the course of an imaging survey of 197 objects that were...
PPV Chapter - The Formation of Brown Dwarfs (2006)
Whitworth, Anthony, Bate, Matthew R., Nordlund, Aake, Reipurth, Bo, Zinnecker, Hans
We review five mechanisms for forming brown dwarfs: (i) turbulent fragmentation of molecular clouds, producing very low-mass prestellar cores by shock compression; (ii) collapse and fragmentation of...
3-D Kinematics of the HH 110 jet (2004)
Lopez, Rosario, Estalella, Robert, Raga, Alejandro C., Riera, Angels, Reipurth, Bo, Heathcote, Steve R.
We present new results on the kinematics of the jet HH 110. New proper motion measurements have been calculated from [SII] CCD images obtained with a time baseline of nearly fifteen years. HH 110...
IRAS 05436-0007 and the Emergence of McNeil's Nebula (2004)
We present a study of McNeil's Nebula, a newly appeared reflection nebula in the L1630 cloud, together with photometry and spectroscopy of its source. New IR photometry compared to earlier 2MASS data...
A subarcsecond companion to the T Tauri star AS 353B (2004)
Tokunaga, A. T., Reipurth, Bo, Gaessler, W., Hayano, Yutaka, Hayashi, Masahiko, Iye, Masanori, ...
Adaptive optics imaging of the bright visual T Tauri binary AS 353 with the Subaru Telescope shows that it is a hierarchical triple system. The secondary component, located 5.6" south of AS 353A, is...
Multiple protostars, jets, and the origin of brown Dwarfs (2004)
Clarke, Cathie, Delgado Donate, Eduardo, Reipurth, Bo
El hecho de que las estrellas jovenes se agrupen en sistemas multiples de pocos cuerpos y no-jerarquicos tiene profundas consecuencias para la comprension de la formacion de las estrellas, de las...
A Disk Shadow Around the Young Star ASR 41 in NGC 1333 (2003)
Hodapp, Klaus W., Walker, Christina H., Reipurth, Bo, Wood, Kenneth, Bally, John, Whitney, Barbara A., ...
We present images of the young stellar object ASR 41 in the NGC 1333 star forming region at the wavelengths of H_alpha and [SII] and in the I, J, H, and K-bands. ASR 41 has the near-infrared...
A Subarcsecond Companion to the T Tauri Star AS 353B (2003)
Tokunaga, A. T., Reipurth, Bo, Gaessler, W., Hayano, Yutaka, Hayashi, Masahiko, Iye, Masanori, ...
Adaptive optics imaging of the bright visual T Tauri binary AS 353 with the Subaru Telescope shows that it is a hierarchical triple system. The secondary component, located 5.6" south of AS 353A, is...
A Cluster of Compact Radio Sources in NGC 2024 (Orion B) (2003)
Rodriguez, Luis F., Gomez, Yolanda, Reipurth, Bo
We present deep 3.6 cm radio continuum observations of the H II region NGC 2024 in Orion B obtained using the Very Large Array in its A-configuration, with $0\rlap.{''}2$ angular resolution. We...
Brown Dwarfs as Ejected Stellar Embryos: Observational Perspectives (2002)
We discuss a scenario in which brown dwarfs are formed like stars, except that their full collapse phases are interrupted through dynamical interactions in small multiple systems, leading to the...
Chandra Study of Young Stellar Objects in the NGC 1333 Star-forming Cloud (2002)
Getman, Konstantin V., Feigelson, Eric D., Townsley, Leisa, Bally, John, Lada, Charles J., Reipurth, Bo
NGC 1333, a highly active star formation region within the Perseus molecular cloud complex, has been observed with the ACIS-I detector on board the Chandra X-ray Observatory. In our image with a...
A Dynamical Origin for Brown Dwarfs (2001)
Reipurth, Bo, Clarke, Cathie, Delgado-Donate, Eduardo
Brown dwarfs may have such low masses because they are prematurely ejected from small unstable multiple systems, while the members are still actively building up their masses. We demonstrate that...
Discovery of X rays from Class 0 protostar candidates in OMC-3 (2001)
Tsuboi, Yohko, Koyama, Katsuji, Hamaguchi, Kenji, Tatematsu, Ken'ichi, Sekimoto, Yutaro, Bally, John, ...
We have observed the Orion Molecular Clouds 2 and 3 (OMC-2 and OMC-3) with the Chandra X-ray Observatory (CXO). The northern part of OMC-3 is found to be particularly rich in new X-ray features; four...
The Formation of Brown Dwarfs as Ejected Stellar Embryos (2001)
We conjecture that brown dwarfs are substellar objects because they have been ejected from small newborn multiple systems which have decayed in dynamical interactions. In this view, brown dwarfs are...
Irradiated Herbig-Haro Jets in the Orion Nebula and Near NGC 1333 (2000)
We report the discovery of a dozen Herbig-Haro jets illuminated by the Lyman continuum and/or softer far-ultraviolet radiation fields of nearby high mass stars. Five irradiated outflows lie in the...
Herbig-Haro objects and their energy sources /--Bo Reipurth. (1999)
Thesis (Doctoral)--Københavns Universitet, 1998.
Multiple CO Outflows in Circinus: The Churning of a Molecular Cloud (1998)
Bally, John, Reipurth, Bo, Lada, Charles J., Billawala, Youssef
We present a millimeter wave study of a cluster of bipolar CO outflows embedded in the western end of the Circinus molecular cloud complex, G317-4, that is traced by very high optical extinction. For...
The outburst of the T Tauri star EX Lupi in 1994 (1995)
Lehmann, Thomas, Reipurth, Bo, Brandner, Wolfgang
We have observed an outburst of the T Tauri star EX Lup in March 1994. We present both photometric (BVR) and spectroscopic (low and medium resolution) observations carried out during the decline...
Star Formation Studies at the VLT (1995)
Bertout, Claude, Reipurth, Bo, Malbet, Fabien
We present an overview of what can be done in the field of star formation using the VLT and its advanced instrumentation, and especially with the very high angular resolution provided by the VLT in...