Large Scale Distribution of T Tauri Stars as Observed with the ROSAT X-ray Survey

Neuhäuser, R.; Sterzik, M. F.

doi:10.1007/978-94-011-5784-1_25

Cited by 6 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The discovery of young stars south of Taurus led Neuhauser et al (1997) through a similar considerations when discussing the origin of their lithium-rich targets. In addition, they proposed two alternatives that may be applicable to HD 32297.…”

Section: Discussionmentioning

confidence: 99%

First Optical Images of Circumstellar Dust Surrounding the Debris Disk Candidate HD 32297

Kalas

2005

ApJ

View full text Add to dashboard Cite

Near-infrared imaging with the Hubble Space Telescope recently revealed a circumstellar dust disk around the A star HD 32297. Dust scattered light is detected as far as 400 AU radius and the linear morphology is consistent with a disk ∼10 • away from an edge-on orientation. Here we present the first optical images that show the dust scattered light morphology from 560 to 1680 AU radius. The position angle of the putative disk midplane diverges by ∼31 • and the color of dust scattering is most likely blue. We associate HD 32297 with a wall of interstellar gas and the enigmatic region south of the Taurus molecular cloud. We propose that the extreme asymmetries and blue disk color originate from a collision with a clump of interstellar material as HD 32297 moves southward, and discuss evidence consistent with an age of 30 Myr or younger.

show abstract

Section: Discussionmentioning

confidence: 99%

First Optical Images of Circumstellar Dust Surrounding the Debris Disk Candidate HD 32297

Kalas

2005

ApJ

View full text Add to dashboard Cite

show abstract

“…Large samples of stellar X-ray sources have been discovered serendipitously by the Einstein, EXOSAT and ROSAT Observatories. Optical follow-up studies have demonstrated that these samples are composed mainly of active stars like RS CVn and W UMa binaries, pre-main sequence and other very young stars, and BY Dra flare stars (Fleming et al 1988;Tagliaferri et al 1992Tagliaferri et al , 1994Favata et al 1993; Pye et al 1995;Jeffries 1995;Neuhauser et al 1997). The most interesting result of these surveys is that there seems to be an excess of young stars near ZAMS or even younger, with respect to what is predicted by the Galaxy models.…”

Section: Introductionmentioning

confidence: 93%

Lithium in Cool Stars Detected in EUV Surveys

Tagliaferri

Pastori

Cutispoto

et al. 2000

Symp. - Int. Astron. Union

View full text Add to dashboard Cite

show abstract

“…There has been much debate over the last few decades as to whether there exists a population of 3-10 Myr old post T-Tauri stars associated with the current 1-2 Myr old Taurus members. Spectroscopic follow-up studies of RASS-selected sources have identified a wide-spread population of stars in the vicinity of Taurus (e.g., Neuhäuser et al 1997, Wichmann et al 1996, but the distances, ages, and origins of these stars remain controversial.…”

Section: A New Distributed Population and The Post T-tauri Star Problemmentioning

confidence: 99%

“…Several studies (e.g., Neuhäuser et al 1997, Wichmann et al 1996 have attempted to use the ROSAT All Sky Survey (RASS) with spectroscopic follow-up to identify G-mid K type post T-Tauri Stars (stars with ages ∼3-10 Myr; PTTSs) far from the current Taurus members. These observations revealed a distributed population of lithium-rich stars (indicating that they are younger than ∼100 Myr) that are widely dispersed across the cloud and beyond.…”

Section: Introductionmentioning

confidence: 99%

A Distributed Population of Low?Mass Pre?Main?Sequence Stars near the Taurus Molecular Clouds

et al. 2006

View full text Add to dashboard Cite

We present a drift scan survey covering a ∼5 o × 50 o region toward the Southern portion of the Taurus-Auriga molecular cloud. Data taken in the B, R, I filters with the Quest-2 camera on the Palomar 48-inch telescope were combined with 2MASS near-infrared photometry to select candidate young stars. Follow-up optical spectroscopy of 190 candidates led to identification of 42 new low mass pre-main sequence stars with spectral types M4-M8, of which approximately half exhibit surface gravity signatures similar to known Taurus stars while the other half exhibit surface gravity signatures similar to members of the somewhat older Upper Sco, TW Hya and Beta Pic associations. The premain sequence stars are spread over ∼35 o , and many are located well outside of previously explored regions. From assessment of the spatial and proper motion distributions, we argue that the new premain sequence stars identified far from the clouds cannot have originated from the vicinity of the 1-2 Myr-old subclusters which contain the bulk of the identified Taurus members, but instead represent a newly-identified area of recent star-formation near the clouds.Subject headings: open clusters and associations: individual (Taurus) -stars: low mass, brown dwarfs -stars: pre-main sequence

show abstract

Large Scale Distribution of T Tauri Stars as Observed with the ROSAT X-ray Survey

Cited by 6 publications

References 17 publications

First Optical Images of Circumstellar Dust Surrounding the Debris Disk Candidate HD 32297

First Optical Images of Circumstellar Dust Surrounding the Debris Disk Candidate HD 32297

Lithium in Cool Stars Detected in EUV Surveys

A Distributed Population of Low?Mass Pre?Main?Sequence Stars near the Taurus Molecular Clouds

Contact Info

Product

Resources

About