Ongoing projects

  1. Exposing the origin of transitional disks: I have two ALMA projects from Cycle 0 and Cycle 1 that aim to determine which physical processes create the observed cavities in transitional disks. By resolving the inner disk structure, in both gas and dust, we can observationally distinguish between different disk-clearing mechanisms, for example dynamical sculpting by a planet or particle growth. The ALMA Cycle 0 observations revealed large-scale asymmetries in the dust emission structure, which require large turbulent velocities to drive the observed features in two disks:

  2. Large-Scale Asymmetries in the Transitional Disks of SAO 206462 and SR 21.       Pérez et al. 2014, ApJL 783, L13 (link)

  3. Grain growth studies in proto-planetary disks: As part of the Disk@EVLA collaboration and my thesis, I embarked on an observational program using CARMA, SMA, and VLA, to search for evidence of radial variations in the dust opacity, indicative of particle growth. The analysis of these multi-wavelength spatially-resolved observations provides strong observational constraints on particle growth in protoplanetary disks:

  4. Constraints on the Radial Variation of Grain Growth in the AS 209 Circumstellar Disk Pérez et al. 2012, ApJL 760, L17 (link to ADS)

  5. Characterization of FU-Orionis objects: To improve our understanding of how low-mass stars form we need to study the global properties of disks and envelopes around FU-Ori-like stars. We have characterized the dusty disk surrounding the FU-Ori object PP 13S* using CARMA observations. Recently, my summer student Sam Mellon has been analyzing CARMA observations of molecular gas emission from the observed outflow in this region.

  6. Characterizing the dusty disk around the FU-Orionis object PP 13S*.                    Pérez et al. 2010b, ApJ 724, 493 (link to ADS)

  1. Trying to detect rotational lines from PAHs with the GBT: with my collaborator Yacine Ali-Haïmud, we are exploring the possibility of detecting rotational line emission from specific PAHs in a region of intense Anomalous Microwave Emission (AME). Our GBT observing run is scheduled for March 2014, and here is Yacine’s paper with the prediction.

Some Past Projects

  1. Study of the azimuthal asymmetry in the LkHa 330 circumstellar disk. Isella, Pérez, Carpenter, et al. 2013, ApJ 775, 30 (link to ADS)

  2. Characterization of the ionized circumstellar envelopes of Orion-KL sources. Plambeck, et al. including L. Pérez 2013, Apj, 765, 40 (link to ADS)

  3. Investigating the nature of the transitional disk around Lk Ca15 (Isella, Pérez, Carpenter, 2012, ApJ, 747, 136 (link to ADS)

  4. CARMA Paired Antennas Calibration system, used for calibrating high angular resolution observations (Pérez et al. 2010a, Zauderer et al. 2014 submitted)