Home      Library      Discussions      About
Join us

@noao.edu

Aug 08, 2014

The Changing Fractions of Type Ia Supernova NUV-Optical Subclasses wi…

UV and optical photometry of Type Ia supernovae (SNe Ia) at low redshift have revealed the existence of two distinct color groups, NUV-red and NUV-bl…
Mar 12, 2010

Circumstellar Structure around Evolved Stars in the Cygnus-X Star F…

We present observations of newly discovered 24 micron circumstellar structures detected with the Multiband Imaging Photometer for Spitzer (MIPS) arou…
May 23, 2007

Late-Type Red Supergiants: Too Cool for the Magellanic Clouds?

We have identified seven red supergiants (RSGs) in the Large Magellanic Cloud (LMC) and four RSGs in the Small Magellanic Cloud (SMC), all of which h…
Jan 15, 2009

The planetary nebula population of M33 and its metallicity gradient: …

The Planetary Nebula (PN) population of M33 is studied via multi-fiber spectroscopy with Hectospec at the MMT. In this paper we present the spectra o…
Jul 12, 2014

Followup Observations of SDSS and CRTS Candidate Cataclysmic Variables

We present photometry of 11 and spectroscopy of 35 potential cataclysmic variables from the Sloan Digital Sky Survey, the Catalina Real-Time Transien…
Apr 21, 2015

Demographics of Transition Discs in Ophiuchus and Taurus

Transition disc systems are young stars that appear to be on the verge of dispersing their protoplanetary discs. We explore the nature of these syste…
Jan 06, 2011

GALEX and Optical Observations of GW Librae During the Long Decline f…

The prototype of accreting, pulsating white dwarfs (GW Lib) underwent a large amplitude dwarf nova outburst in 2007. We used ultraviolet data from GA…
Dec 07, 2007

Evolution of Mid-IR Excess Around Sun-like Stars: Constraints on Mode…

We report observations from the Spitzer Space Telescope (SST) regarding the frequency of 24 micron excess emission toward sun-like stars. Our unbiase…
Apr 04, 2012

Evolution of active and polar photospheric magnetic fields during the…

The evolution of the photospheric magnetic field during the declining phase and minimum of Cycle 23 and the recent rise of Cycle 24 are compared with…
Aug 03, 2009

The H2 velocity structure of inner knots in HH 212: asymmetries and …

High-resolution R~50 000 long-slit spectroscopy of the inner knots of the highly symmetrical protostellar outflow HH 212 was obtained in the 1-0 S(1)…
Aug 09, 2012

Observable Signatures of Planet Accretion in Red Giant Stars I: Rapid…

The orbital angular momentum of a close-orbiting giant planet can be sufficiently large that, if transferred to the envelope of the host star during …
Apr 20, 2007

Mapping the Cosmological Confidence Ball Surface

We present a new technique to compute simultaneously valid confidence intervals for a set of model parameters. We apply our method to the Wilkinson M…
Mar 20, 2014

Meridional Flow in the Solar Convection Zone I: Measurements from GON…

Large-scale plasma flows in the Sun's convection zone likely play a major role in solar dynamics on decadal timescales. In particular, quantifying me…
May 02, 2009

Mid-IR Luminosities and UV/Optical Star Formation Rates at z<1.4

UV continuum and mid-IR emission constitute two widely used star formation indicators at intermediate and high redshifts. We study 2430 galaxies with…
Mar 08, 2011

The Frequency of Rapid Rotation Among K Giant Stars

We present the results of a search for unusually rapidly rotating giant stars in a large sample of K giants (~1300 stars) that had been spectroscopic…
May 15, 2007

Distances to Populous Clusters in the LMC via the K-Band Luminosity o…

We present results from a study of the distances and distribution of a sample of intermediate-age clusters in the Large Magellanic Cloud. Using deep …
Aug 23, 2010

First Results from the NOAO Survey of the Outer Limits of the Magella…

[abridged] We describe the first results from the NOAO Outer Limits Survey. The survey consists of deep images of 55 0.6x0.6 degree fields at distanc…
Jun 28, 2016

Carbon and oxygen isotopic ratios for nearby miras

C and O isotopic ratios are reported for a sample of 46 Mira and SRa-type variable AGB stars. Vibration-rotation 1st and 2nd overtone CO lines in 1.5…
Apr 09, 2008

GALEX, Optical and IR Light Curves of MQ Dra: UV Excesses at Low Ac…

Ultraviolet light curves constructed from NUV and FUV detectors on GALEX reveal large amplitude variations during the orbital period of the Low Accre…
Oct 05, 2009

Searching for Faint Planetary Nebulae Using the Digital Sky Survey

Recent Halpha surveys such as SHS and IPHAS have improved the completeness of the Galactic planetary nebula (PN) census. We now know of ~3,000 PNe in…
There aren't more papers

Request Comment

or Invite via email
You are asking your first question!
How to quickly get a good answer:
  • Keep your question short and to the point
  • Check for grammar or spelling errors.
  • Phrase it like a question
Test
Test description